Engine Reconditioning Overview & Tips
For your 1929-1955 Chevrolet Straight Six Engine

December 17, 2001
Edited by: James W. Burnes

Part IV: CONNECTING RODS, BEARINGS, and PISTON REPAIR

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The pin is locked in the connecting rod by a clamp screw. Be sure this screw has good threads and contains a lockwasher under its head before tightening as pin might become loose and score the cylinder wall and may also cause piston breakage.

PISTON RINGS

When an engine is fitted with new rings, the ridge at the top ot the cylinder should be removed with a ridge remover.

Check the new rings in the smallest diameter of the cylinder (about 2 in. from the bottom).

Ring gap for both compression and oil control rings should be .005 -.015 in. Rings should be checked for side clearance in the piston grooves (.0015 - .003 in. for compression rings and .002 -.0035 for oil rings). Lubricate rings before installing and use ring compressor. (see fig. A5, A6 )

 

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Read Part I, overview of the straight six engine

Read Part II, engine removal and reinstallation

Read Part III, cylinder block and rod/piston assembly

Read Part IV, Connecting Rods, Bearings, and Piston

Read Part V, Camshaft, Crankshaft , and Bearings