Abstract: A cover for a cylinder head of an internal combustion engine having a connecting element for attachment the cylinder head and a sealing element arranged between the cylinder head cover and the cylinder head. The connecting element is associated with a connecting area, and the sealing element is associated with a sealing area. The connecting area and the sealing area are constructed independently of each other and are spatially separated from each other, and the force vectors of the connecting force transmitted by the connecting element and the sealing force transmitted by the sealing element form an angle with each other.

Abstract: A fuel injector having an injection nozzle; an injection valve having a movable pin for regulating fuel flow through the injection nozzle; an electromagnetic actuator for moving the pin between a closed position and an open position respectively closing and opening the injection valve; and a tubular supporting body, which has a central channel for feeding pressurized fuel to the injection nozzle, and houses the electromagnetic actuator, the injection valve, and the pin; the supporting body is formed by joining a one-piece tubular top member housing the electromagnetic actuator and made of high-tensile steel with poor magnetic characteristics, and a one-piece tubular bottom member housing the injection valve and made of a low-thermal-expansion alloy.

Abstract: A flange (3) for sealing an opening (1) of a fuel container (2) of a motor vehicle maintains an electronic component (9) which is arranged on the external side (5) on a carrier (12). The carrier (12) is embodied as a single piece and has a heat-conducting element (13) which can penetrate the wall (4) of a flange (3). The heat-conducting element (13) dissipates the heat which is produced by the electronic component (9) to the inside (7) of the fuel container (2).

Abstract: According to the invention, a sealing disc (16) serves to seal off a fuel injector with respect to an engine block of an internal combustion engine. Said sealing disc (16) comprises an inner opening (24) and a captive securing means (28) for captive retention on the fuel injector. It is proposed according to the invention that the sealing disc (16) has, overall, at least one support layer (30) and at least two sealing layers (32, 34) arranged to each side of the support layer (30), wherein the support layer (30) is made from a stiffer material than the sealing layers (32, 34), and that the captive securing means comprises, at an edge of the inner opening, at least one radially inwardly extending lug-like projection (28).

Abstract: An intake and exhaust tuning system is disclosed. The exhaust system includes a collector slidably mounted within the exhaust fluid path and adjustable by an actuator to change the fluid path length between the collector and the exhaust ports of an engine. The intake tuning system includes a sliding member engaging parallel straight sections of tubes forming the intake system. The position of the sliding member is adjusted to change the length of the intake fluid path. Sealing members suitable for use in the intake and exhaust tuning systems are also disclosed.

Abstract: A seal arrangement for a rotary valve internal combustion engine having a cylinder 1 including a valve port 7 in communication with a combustion chamber 5, the cylinder 1 being rotatable about its longitudinal axis 1a in a cylindrical bore 8 of a valve housing 9, the valve housing having an inlet port 10 and an outlet port adapted to be aligned successively with said valve port 7 during rotation of the cylinder 1 in the housing 9 to enable fluid to flow respectively into and out of the combustion chamber 5. The seal arrangement forms a seal around the valve port 7 between the cylinder and a concentric surface, and comprises a seal element 12 located in a recess 11 in said cylinder, fluid pressure in said valve port 7 acting on said seal element 12 to urge the seal element into contact with the said concentric surface and outwardly from the centre of the port into contact with the periphery 7b of said recess 11.

Abstract: A gasket can include a body adapted to form a seal in an engagement region between two members. A first sealing portion can be formed in the body and define a first plane. A second sealing portion can be formed in the body and occupy a space outside of the first plane. A first transition portion is formed between the first and second portions. The first transition portion defines a first width in the engagement region that is greater than a second width defined in the first and second portion adjacent to the first transition portion.

Abstract: A combustor-to-transition seal (301) includes a spring clip assembly (322, 422, 522) and a first spring metal ring (340, 441) or a ring assembly (440,540) that includes the first spring metal ring (441) and a second spring metal ring (442). Such combustor-to-transition seal (301) provides a first seal (321) and a second seal (331, 531) when at a junction of a combustor (108, 308, 508) and a transition (114, 314, 514). In an embodiment, the first spring metal ring (340) has a plurality of apertures (342) through the ring (340) that provide effusion cooling of the ring (340). The plurality of apertures (342) regulates a flow of cooling fluid to maintain an acceptable temperature of the ring (340). In an alternative embodiment, the second spring metal ring (442) has grooves (446) that regulate a flow of cooling fluid to maintain an acceptable temperature of the ring assembly (440).

Abstract: Sealing gasket construction for providing a fluid seal intermediate a pair of opposed, mating parts or structures. The gasket includes a metal retainer and a resilient seal element received in a groove formed into the retainer. Such groove is adapted to be fabricated by coining or a like sheet metal stamping or forming process.

Abstract: A shielding component, in particular a heat shield, includes shield components (10, 12, 14) made flat, lying at least partially on top of one another, and connected to one another at least partially along at least one common connecting line (16). Since the shield components (10, 12) at least partially form a gasket (30) by at least one shield component (10) having a projection relative to its remaining superficial extent, a further function in the form of a sealing function is implemented in a heat shield for acoustic and heat insulation.

Abstract: A shielding component, in particular a heat shield, has shield components (10, 12, 14) which are made flat, which lie at least partially on top of one another, and which are connected to one another at least partially along at least one common connecting line (16). Along the common connecting line (16), at least one shield component (14) encompassing another shield component (10, 12) in an overlap (18). Within the overlap (18), the shield components (10, 12, 14) are held at least partially by frictional engagement so as to be displaceable against one another relative to a compensation distance. A rigid connection of the shield components with their individual layers is avoided. Rather, depending on the thermal situation, they can mutually slide off one another.

Abstract: A sealing system, in particular for sealing multi-part exhaust gas pipes for an internal combustion engine, with at least a first flange part (9) and a second flange part (11) that guide a heat flow (5) and that border between them a receiving space (33) for at least one sealing element (29, 31), is characterized in that the flange parts (9, 11) that are adjacent to one another in each case form a ring flange (13) that extends outward, facing away from the heat flow (5) and running transversely to the latter, in which the faces (15, 17) of the flange parts (9, 11) that are adjacent to one another form a chamber to some extent of the receiving space (33) of the sealing element (29, 31).

Abstract: A gasket (200) includes a metal substrate (202) that has a first opening (204) and a second opening (216) formed therein. A first sealing bead (208) substantially surrounds the first opening (204). A second sealing bead (220) substantially surrounds the second opening (216). A leak conduit (230) is formed in the metal substrate (202) in an area (228) between the first sealing bead (208) and the second sealing bead (220), such that a leak-flow (316) of a first fluid from the second opening (216) past the second sealing bead (220) is routed away from the first sealing bead (208).

Abstract: A metal gasket formed from a suitable iron-nickel chromium alloy includes at least one embossment that exhibits essentially full functional recovery at temperatures exceeding 1000° F. and including in the range of 1100° F. to 1600° F. or more and which is made from sheet material that is work hardened and strengthened by cold rolling, or a combination of cold rolling and precipitation hardening, without any post embossment heat treating that would act to further harden the material. Suitable iron-nickel-chromium alloys include those comprising, by weight, greater than 18% nickel; greater than 14% chrome and 0.1-10% of at least one element selected from the group consisting of Mo, Ti, V, Al, Co, Nb, Ta and Cu, with the balance being substantially Fe, wherein the gasket sheet alloy has a deformed microstructure.

Abstract: A gasket assembly and method of manufacture thereof provides a plurality of discrete, interconnected capsule beads spaced from one another. A sealant material is disposed in the capsule beads, such that when the capsule beads are ruptured under an applied clamping force, the gasket material is released from the capsule beads.

Abstract: A seal member seals a gap between upper and lower cover members of an engine cover of an outboard motor. The seal member includes a supporting portion and a sealing portion integral with the supporting portion. The supporting portion has such a high spring modulus that the supporting portion is not plastically deformed with a load is applied to the supporting portion when the upper cover member is locked to the lower cover member. The sealing portion is hollow and has such a small spring modulus that the sealing portion can readily flex into close contact with the upper and lower cover members so as to provide an improved seal between the upper and lower cover members.

Abstract: A fuel injector for the direct injection of fuel into the combustion chamber of a mixture-compressing internal combustion engine having external ignition includes a valve housing formed by a nozzle body, and a seal which seals the fuel injector from a cylinder head of the internal combustion engine. The seal has a sleeve-type design with a structured cross section and extends across the axial length of the nozzle body.

Abstract: A combustion engine includes a cylinder head and a cylinder crankcase having a cylinder bore and a coolant duct formed therein. The coolant duct is disposed adjacent the cylinder bore and is a cooling system component. A cylinder head gasket is provided between the cylinder head and the cylinder crankcase. The coolant duct has a coolant duct upper end and is open toward the cylinder head gasket at the coolant duct upper end. The cylinder head gasket has a side facing the cylinder crankcase when the cylinder head gasket is installed. The cylinder head gasket has a channel formed on the side of the cylinder head gasket that faces the cylinder crankcase. The channel is in a flow connection with the coolant duct and is part of the cooling system.

Abstract: A plastic component, usable in a combustion engine, is made by forming an elastomeric seal onto at least one support element. The support element, complete with the seal, is placed in a cavity or fixture of a plastic injection mold, and the plastic component is created only by forming plastic material onto the support element. The finished plastic component with the molded-on seal is removed from the cavity.

Abstract: A seal (301) has a first surface capable of contacting a valve cover (101) over a first fluid while a second surface, opposed to the first surface, is capable of contacting a seal seat (303). The seal (301) also has a third surface capable of contacting a sensor (201) disposed in a second fluid, while a fourth surface, opposed to the third surface, is capable of contacting the seal seat (303). The seal (301) is capable of separating the first fluid from the second fluid while preventing the first fluid and the second fluid from leaking out of the valve cover (101).

Abstract: A gasket includes a first plate formed of a plurality of first plate pieces. Each plate piece has at least one combustion chamber hole therein, and a device for connecting the first plate pieces together. The first plate pieces are arranged such that the first combustion chamber holes are aligned in series and two first plate pieces situated adjacent to each other are connected through the connecting device.

Abstract: Compositions and methods for coating surfaces of MLS gasket layers are disclosed. The process includes applying a coating precursor on at least one surface of one or more of the layers, and curing the coating precursor by exposure to radiation. Disclosed coating precursors include those containing an acrylated oligomer and a photoinitiator, which can polymerize in response to ultraviolet or electron beam radiation.

Abstract: An exhaust manifold has a head flange constructed for receiving at least two exhaust pipes arranged side-by-side, and includes spaced apart first and second longitudinal flange portions. A mounting assembly is provided for sealingly securing the exhaust manifold to a cylinder head of an internal combustion engine and includes a mounting rail formed with a shoulder which laps over the first longitudinal flange portion and contacts the first longitudinal flange portion in a spring-elastic manner. Plural screw fasteners at least indirectly clamp the second longitudinal flange portion to the cylinder head.

Abstract: A multi-use gasket assembly includes at least two lobes each having a fluid-conveying opening with an associated axis. Four mounting holes are formed in each of the lobes about the openings. The gasket has symmetry across a plane of symmetry containing the axes of the openings.

Abstract: A three-prong integrally formed resilient seal for sealing the juncture of three gasketed members. The seal has a common region having an embedded strain distributor of stiffer material than the remainder of the seal which is integrally formed, preferably by insert molding as a one-piece member.

Abstract: A sealing-enhancing coating for a gasket or a portion of a gasket includes flaky particles of chemically exfoliated vermiculite, at least 90% by weight of the particles having a thickness of no more than 30 microns, and no dimension greater than 1 mm. The particles form 10 to 90 wt. % of the coating. The coating also includes 50 to 10 wt. % of an organic polymer binder which when formed into a film 1 mm or less in thickness and heated to 300° C. in free air for 24 hours either does not decompose or decomposes leaving a residue of at least 20% by weight of film.

Abstract: A metallic gasket having a first seal line SL1 arranged in a manner to encircle the peripheral edge of an exhaust gas hole 3, a second seal line SL2 arranged along the outer peripheral edge of a base plate 2, and full beads 6, 7 formed each in a convex cross-section by bending the base plate 2 along both seal lines. Elastic sealing material 8 to 11, the height of which is substantially equal to the height of a convex portion of the beads, are fixed to the convex portion and a flat surface continuous to the convex portion. The elastic sealing material on the flat surface is so arranged as to cover up to the opening mouth position of the exhaust gas hole 3 or a peripheral edge position of the base plate 2 and, furthermore, elastic material parts 12, 13 are filled in a concave portion of the bead on the reverse side of the convex portion. This structure of the gasket leads to cost reduction and enables the gasket to maintain a stable sealing performance for a long period of time.

Abstract: Gaskets are placed in joints between adjacent nonferrous metal engine members of a water-cooled engine for an outboard motor, such as a cylinder block, a cylinder head, a crankcase, a mount case and an oil pan, to seal the joints. Each of the gaskets has a base member formed of a stainless steel. The surfaces of the base member are coated with electrochemical corrosion preventing films formed by applying a liquid containing flakes of an aluminum alloy or a zinc alloy and a silicate resin in films and baking the films of the liquid. The electrochemical corrosion preventing films are coated with sealing films formed by applying a liquid containing aluminum flakes and a silicate resin to the electrochemical corrosion preventing films and baking the films of the liquid. The gaskets are prevented from electrochemically corroding despite potential difference between each gasket and the adjacent engine members.

Abstract: A sealed cover assembly for a fluid-containing cavity of an engine includes a cover including a fluid-containing wall with a peripheral edge having a sealing surface adapted to oppose a corresponding sealing surface of the engine, and a plurality of mounting openings in the peripheral edge; a reaction pad adjacent each of the openings and disposed at the peripheral edge on an opposite surface of the sealing surface around a perimeter defining the cover; a brace disposed against the reaction pad around the perimeter defining the cover; and mechanical fasteners extending through the reaction pad and the brace for securing the cover to a mating edge of the engine cavity, the fasteners when engaged providing substantially equal compression forces on the reaction pad via the brace and supporting the cover sealing surface with a predetermined gap from the cavity mating edge for engagement with a compliant sealing material disposed between the surfaces.

Abstract: A crankcase is coupled to a lower end face of a cylinder block of an engine and includes first and second case halves coupled to each other in a plane perpendicular to joint surfaces of the cylinder block and the crankcase. A U-shaped seal groove is defined in one of the joint surfaces of the case halves. Enlarged recesses are made at opposite ends of the seal groove. A bar-shaped seal member having enlarged end portions formed at opposite ends thereof is mounted in the groove such that the enlarged end portions are filled in the enlarged recesses. Thus, it is possible to ensure accuracy of the positioning of the bar-shaped seal member without the need for a high level skill; thereby, reliably sealing portions of intersection between the joint surfaces of the cylinder block and the crankcase and the joint surfaces of the case halves of the crankcase.

Abstract: A gasket having a gasket plate formed with an aperture. An annular flange provides a stopper seal around the aperture. The flange has spaced areas of varying thickness. The gasket is formed by punching an opening in the gasket plate inwardly of an annular array of bolt-holes. An annular portion of the plate surrounding the opening is folded back to form the flange and place it in surface-to-surface contact with the plate. The areas of the flange adjacent to the bolt-holes are compressed a greater amount than areas of the flange more remote from the bolt-holes.

Abstract: A combustion gas seal for injectors having the function to prevent the leak of a combustion gas when the injector is mounted on a cylinder head of an engine, wherein the seal is made of a resin and the entire surface of the combustion gas side end of the seal is exposed to the pressure of the combustion gas. The seal exhibits improved sealing performance together with improved soundproofing effect.

Abstract: A flat gasket for sealing off a region, especially for sealing off a region bordered by a cylinder head cap, includes an elastic material that effects the sealing function and at least one pass-through region for passing through a conductor such that the conductor can extend, in the mounted condition of the flat gasket, from outside the region to be sealed off into the interior of such region. The flat gasket also includes a shaped tongue connected to the pass through region and extending into the region to be sealed off, the shaped tongue having opposed flat sides and being deformable at least vertically relative to the plane of the seal, and the tongue supporting on its flat sides at least one conductor guiding- and/or conductor securing-element.

Abstract: A cylinder head gasket comprising a gasket plate for an engine in which at least one first coolant cavity is formed in the engine block adjacent to the cylinder head gasket, with the gasket plate comprising coolant passage openings via which the first coolant cavity is connectable to at least one second coolant cavity formed in the cylinder head of the engine; for improved cooling of the engine the cylinder head gasket comprises at least one flow conducting element for the coolant protruding from the gasket plate, the at least one flow conducting element being of such configuration and being joined to a coolant passage opening of the gasket plate in such a way that the flow conducting element forms a flow path with the coolant passage opening and is designed so as to engage in at least one of the first and second coolant cavities and to generate a directed flow of coolant at the outlet end of the flow path.

Abstract: A heat shield and gasket assembly has three members including a first heat shield, a second heat shield, and a gasket. Each of the members has a flange portion and the flange portion of the gasket is sandwiched between the flanges of the two heat shields. The flange portion of the gasket is thinner than the flange portions of the heat shields. The thinness of the gasket flange permits it to engage threaded assembly fasteners without compromising the thread integrity of the fasteners.

Abstract: A gasket includes an intermediate layer having resilient sealing beads flanked by stopper beads. The three-layer gasket, particularly designed for heavy duty racing engines, provides a relatively robust cross-section in web-areas between cylinder bore apertures. A thin bottom layer includes wrap-around flanged portions extending about cylinder bore edges of the intermediate layer to partially overlap cylinder bore aperture areas of that layer. The flanged portions include a plurality of waves to increase forces to generate the seal. A thin top layer overlies the intermediate layer, as well as the overlapping portions of the bottom layer. In one described embodiment, the overlapping portions are limited to cylinder bore edges between cylinder bores. As a between-engine-overhaul indication of engine health, the top gasket layer is adapted via plastic deformation to form a permanent indentation in an aluminum cylinder head to signal excessive engine operation.

Abstract: A cylinder head gasket that includes a body that has holes stamped through it and is then coated with an encapsulant before assembling armor to the body of the gasket. A topcoat is coated over the body and armor. The encapsulant is preferably an epoxy primer and the topcoat is preferably a silicone.

Abstract: A multi-layer metal gasket includes at least on active layer and at least one shim layer having aligned combustion holes. The shim layer has annular portions surrounding the combustion holes and tab portions projecting radially outwardly from the annular portions surrounding the combustion holes. The annular portions underlie associated sealing beads of the active layer. The tab portions each have a radially extending neck region and a set of lateral bend tabs supported at the end of the neck region and projecting laterally outwardly thereof. The bend tabs project through an associated set of laterally spaced mounting windows formed in the active layer and are bent back toward one another to secure the shim layer to the active layer.

Abstract: A gasket embedding an ion sensor 5 used for sealing a cylinder head to a cylinder block of an engine which is intervened under pressure between the cylinder head and the cylinder block, the gasket having a detection function of the condition in a combustion chamber. The gasket comprises a metal sheet in which a bore seal is formed at a ring-like bead structure and of an insulation seal layer coating at least the upper surface and the lower surface of the metal sheet so as to include the bead structure. An ionic current detection electrode is formed so as to project into the combustion chamber from the insulation seal layer and further a lug projecting outside from the periphery of the insulation seal layer is served as an ionic current introduction electrode of the sensor.

Abstract: In order to provide a cylinder head gasket, comprising at least one beaded gasket sheet, which comprises at least one combustion chamber opening and a bead, which may be vertically deformed and surrounds the combustion chamber opening, and at least one deformation limiting means adjacent to the bead, which can be produced simply and with low material usage and which is flexible with respect to the arrangement and configuration of the deformation limiting means, it is proposed that the deformation limiting means comprises at least one deformation limiting element disposed on a deformation limiting sheet of the cylinder head gasket, said element having at least one reinforcement region, which is located at a distance from the combustion chamber opening and is formed by separating a region of the deformation limiting sheet along a separating line and subsequently bending this region out of the plane of the deformation limiting sheet.

Abstract: A cylinder head gasket includes a main gasket body having at least one cylinder opening, a wire sealing ring, and a metal armoring ensheathing the wire sealing ring. The metal armoring has a first annular flange portion extending beyond the cylinder opening in overlying relation to a first main surface of the main gasket body, a second flange portion opposite the first flange portion having a size no greater than that of the cylinder opening, and a curved portion joining the first and second flange portions. The cylinder opening is notched to receive lock tabs of the second flange portion through the main body, after which the metal armoring is rotated to offset the lock tabs from the notches to lock the armoring and sealing ring within the cylinder opening.

Abstract: An MLS cylinder head gasket includes a relatively thick intermediate layer having resilient sealing beads flanked by stopper beads. The stopper beads limit compression of the sealing beads, which surround combustion cylinder bore apertures. The three-layer gasket, particularly designed for heavy duty racing engines, provides a relatively robust cross-section in web-areas between cylinder bore apertures. A thin bottom layer includes wrap-around flanged portions extending about cylinder bore edges of the intermediate layer to partially overlap cylinder bore aperture areas of that layer. A thin top layer overlies the intermediate layer, as well as the overlapping portions of the bottom layer. In one described embodiment, the overlapping portions are limited to cylinder bore edges between cylinder bores. As a between-engine-overhaul indication of engine health, the top gasket layer is adapted via plastic deformation to form a permanent indentation in an aluminum cylinder head to signal excessive engine operation.

Abstract: A metal gasket for an internal combustion engine is formed of a metal plate including a base portion extending substantially throughout an entire area to be sealed, at least one hole formed in the base portion, a curved portion extending from the base portion, and a flange extending from the curved portion and disposed on a part of an upper surface of the base portion. A coating member is deposited on the flange facing the base portion and/or the base portion facing the flange. The coating member is formed of a non-thermoplastic coating material to operate as a surface pressure regulating member between the flange and the base portion to thereby regulate a surface pressure at the flange.

Abstract: In an engine having a rocker member adapted to rock about an axis intermediate the rocker member and a pushrod extending from a lower body to an upper body and engaging an end of the rocker member, a gasket for sealing the lower body to the upper body is provided. The gasket includes a sealing portion adapted to substantially seal at least a portion of the upper body to the lower body, and a pushrod support portion extending outwardly from the sealing portion adapted to engage the pushrod. At least a portion of the pushrod support portion engaging the pushrod is constructed from a material that is softer than the material of the pushrod.

Abstract: A sealing system for an internal-combustion engine is provided in which a lubricating-oil-carrying space particularly an oil catching space, is separated by wall elements from adjoining space sections, which wall elements have elastic sealing elements for sealing off the spaces. For the compensation of sealing gap tolerances, a sealing element is provided which has at least two sealing arms which come to rest on the space wall to be sealed off. Despite larger sealing gap tolerances, a secure oil-tight separation of spaces is thereby provided.

Abstract: A casing cover (1, 10, 20) for an internal-combustion engine, particularly valve covers or oil pans, for being mounted detachably and fluid-tight to the engine block (5, 13, 21), having a peripheral edge that is profiled to receive an elastomer seal (3, 12) at the edge (2, 11) of the casing cover (1, 10, 20). The cover is provided with an axial extension (7, 14) that is oriented in the direction of the engine block (5, 13, 21) and is disposed at an inner portion of the edge (2, 11) of the casing cover (1, 10, 20). The extension is positioned to project axially beyond the sealing surface (4, 15), an engine block wherein the casing cover is inserted so the casing cover is at least positioned correctly on the engine block.

Abstract: An improved keeper for positioning ring seals is provided. The keeper includes a substantially planar sheet defining upper and lower surfaces. Projecting through the planar sheet are one or more holes configured for affixing corresponding one or more ring seals. The keeper further includes one or more nodes which extend outwardly from the planar sheet beyond the dimensions of the mating surfaces between which a sealed joint is obtained. The one or more nodes identify the position and number of holes constructed for receiving corresponding ring seals.

Abstract: A fuel injector for the direct injection of fuel into the combustion chamber of a mixture-compressing internal combustion engine having external ignition includes a valve housing formed by a nozzle body, and a first sealing ring which seals the fuel injector against a cylinder head of the internal combustion engine. The first sealing ring tapers conically at a radially outer side in a flow direction of the fuel and cooperates with a second sealing ring, which tapers conically at a radially inner side counter to the flow direction of the fuel.

Abstract: One part of an assembly has one wall with a face-end groove in which a rubber-elastic seal is disposed. In the unstressed state, the seal protrudes past two groove cheeks of the groove. The groove cheek toward the outside is provided with a luglike protrusion while the groove cheek toward the inside has a lesser height than the groove cheek and is wedge-shaped in cross section. The protrusion of the outside groove cheek together with the seal forms a sealing device, whose action in the stressed state is based on the one hand on the plastic deformation of the protrusion on a face of a second part and on the other on the high pressure of the seal in the groove.

Abstract: A plug and seal assembly for use in an automatic transmission provides a fluid coupling interface between transmission components to facilitate the passage of fluid. One plug design has a cylindrical body with a terminal edge at one axial end. A seal is joined to the plug at the terminal axial edge and extends both radially inward and radially outward relative to the terminal axial edge. This single seal design provides leak protection between the plug and transmission housing and between the plug and a tube inserted through the plug. Another plug design has a radially extending flange at one end of the cylindrical plug body. An outer seal annularly disposed about the radial flange prevents leakage between the plug and the surrounding transmission parts. An inner annular seal is disposed within the cylindrical body of the plug and prevents leakage between the plug interior and a fluid conveyance tube inserted through the plug.