Abstract: In accordance with the present invention, the heater provides a core plug having one open axial end and one closed axial end to define a hollow housing. During installation, the closed end of the housing is secured into an engine core bore, such that at least a portion of housing projects inwardly of the bore and is immersed in engine fluid. Independently, a heating element, adaptable to an external power supply, is releasably inserted inside the hollow housing. Heat is therefore conducted directly through the housing directly to the engine fluid and the engine itself. A quick-release retaining member is installed to retain the heating element within the housing while still allowing free rotation of the heating element therein.

Abstract: In accordance with the present invention, a cartridge-style heater received into a bore in an engine block is provided with a quick-release retaining member that attaches to the heater about its outer circumference. A pair of spaced legs and an arm extending from a center portion define the retaining member. The pair of legs frictionally engage the heater while permitting heater to rotate within the bore relative to the member even if the member is fixed to the engine. The rotation also permits the retaining member to rotate about the sleeve to align the retaining member to a predetermined attachment location on the engine independent of the orientation of the heater within the engine bore. This invention provides flexibility in the orientation of the heater to receive an electrical connector from an external power supply and attachment of the heater to the engine regardless of the engine configuration or vehicle model, thereby improving installation, serviceability, and use of the heater.

Abstract: In accordance with the present invention, a cartridge-style heater received into a bore in an engine block is provided with a quick-release retaining member that attaches to the heater about its outer circumference. A pair of spaced legs and an arm extending from a center portion define the retaining member. The pair of legs frictionally engage the heater while permitting heater to rotate within the bore relative to the member even if the member is fixed to the engine. The rotation also permits the retaining member to rotate about the sleeve to align the retaining member to a predetermined attachment location on the engine independent of the orientation of the heater within the engine bore. This invention provides flexibility in the orientation of the heater to receive an electrical connector from an external power supply and attachment of the heater to the engine regardless of the engine configuration or vehicle model, thereby improving installation, serviceability, and use of the heater.

Abstract: In accordance with the present invention, the heater provides a core plug having one open axial end and one closed axial end to define a hollow housing. During installation, the closed end of the housing is secured into an engine core bore, such that at least a portion of housing projects inwardly of the bore and is immersed in engine fluid. Independently, a heating element, adaptable to an external power supply, is releasably inserted inside the hollow housing. Heat is therefore conducted directly through the housing directly to the engine fluid and the engine itself. A quick-release retaining member is installed to retain the heating element within the housing while still allowing free rotation of the heating element therein.