5. If the clearance is excessive, replace the piston pin.
If a new pin does not resolve the clearance problem,
replace the connecting rod.
Connecting Rod Crankshaft Bearing End
NOTE
Measurements of all components should be
taken with the components at normal room
temperature.
1. Using an inside micrometer, measure the connecting
rod crankshaft bearing bore.
2. Compare the bore measurements with the "Engine
Mechanical Specifications".
3. Replace the connecting rod if the bore is out of
specifications. DO NOT recondition the connecting
rod.
Reference: "Piston and Connecting Rod Assemble: ".
Piston and Connecting Rod Assemble
Reference: "Piston, Connecting Rod, and Bearings
Cleaning and Inspection: ".
Special tool
EN 46121 Connecting Rod Guide Pin Set
EN-46745 Piston Pin Clip Remover/Installer
Piston and Piston Pin Installation Procedure
NOTE
• The arrow located on top of the piston
must point toward the front of the engine.
• The connecting rod is non-directional and
may be assembled/reassembled to the
piston in either direction.
1. Lubricate the piston pin bores in the piston and the
connecting rod with GM prelube lubricant GM P/N
1052367 (Canadian P/N 992869) or equivalent.
2. Assemble the piston and piston pin to the connecting
rod. Properly orient the piston when reusing a
marked connecting rod.
3. Align the piston pin bore with the connecting rod pin
bore.
4. Slide the piston pin into the piston and the
connecting rod.
Engine Mechanical:
1D-175