Camshaft, Lifters and Push Rods: Description and Operation

The nodular iron camshaft is supported by six journals directly in the aluminum block. A thrust plate located in front of the first bearing, and bolted to the block, controls end play. A dual roller chain is used to drive the camshaft. The chain is enclosed by a cast aluminum cover. This cover holds the oil pump, the front crankshaft seal, provides front oil pan closure, oil filter and water pump mounting.

Conventional type hollow push rods, retainers and valve stem locks are used.

The valve train includes roller tappet assemblies, aligning yokes and yoke retainer.







Roller tappet alignment is maintained by machined flats on tappet body being fitted in pairs into ten aligning yokes. The yokes are secured by a self contained screw and washer assembly.