Abstract: A connecting rod has at one end thereof two leg portions formed in forked configuration defining therebetween an intermediate groove having a recess of semi-circular cross section on the inside thereof and having oppositely located bolt insertion holes at the leading ends thereof, respectively. In the other side of the intermediate groove is fitted a block having a semi-circular recess defining a crankshaft bearing hole in opposed relationship with said semi-circular recess of the intermediate groove and having a bolt insertion hole formed therethrough and extending coaxially with each of the bolt insertion holes so as to tighten up and fixedly secure the block between the leg portions by a bolt and nut unit.

Abstract: A suction valve seat lubricating apparatus for a multi-cylinder diesel engine wherein a small amount of lubricant is introduced into a suction manifold and it is carried by the compressed suction air to suction valve seats to lubricate them. A partition wall is disposed within the suction manifold for dividing the same into two chambers. Each chamber has a lubricant supply nozzle connected thereto.

Abstract: A method for the production of sintered powder metal preform employing a novel reduction step. As-water-atomized ferrous metal particles are coated by phenol resins by adding said phenol resins to said ferrous metal particles after heating the metal particles to about 130.degree. C. to 150.degree. C. Resin coated ferrous metal particles are then filled in a mold and compacted under high pressure to produce a compacted green preform sufficient to ensure adequate strength for handling after pressing. The green preform is then heated to a reduction temperature within the range of about 1100.degree. C. to 1250.degree. C. for a time sufficient to achieve reduction of said green preform.

Abstract: A method for the production of sintered powder metal preform employing a novel reduction step. As-water-atomized ferrous metal particles are coated by phenol resins by adding said phenol resins to said ferrous metal particles after heating the metal particles to about 130.degree. C. to 150.degree. C. Resin coated ferrous metal particles are then filled in a mold and compacted under high pressure to produce a compacted green preform sufficient to ensure adequate strength for handling after pressing. The green preform is then heated to a reduction temperature within the range of about 1100.degree. C. to 1250.degree. C. for a time sufficient to achieve reduction of said green preform.