90CS Quattro V6-2.8L (AAH) (1994)
Connecting Rod Bearing: Testing and Inspection
CHECKING CONNECTING RODS BEARINGS RADIAL CLEARANCE
NOTE:
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Replace connecting rods only as a complete set.
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Do not interchange connecting rod bearings.
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Always replace connecting rod bearing cap bolts.
1. Mark connecting rod bearing caps with light punch marks (arrow) before removing.
2. Remove connecting rod bearing caps.
3. Clean bearing caps and journals.
4. Place Plastigage over entire width of bearing journal or in bearing shell.
5. Re-install connecting rod bearing cap and tighten to 20 Nm (15 ft. lbs.) only; do NOT tighten further.
NOTE: Do NOT turn the crankshaft or allow it to rotate during the measurement with Plastigage in place.
6. Remove connecting rod bearing caps again.
7. Compare width of Plastigage with measuring scale on package.
Specifications:
New: 0.015 to 0.062 mm (0.00059 to 0.00244 inch).
Wear limit: 0.12 mm (0.0047 inch).