100CS Quattro Wagon V6-2.8L (AAH) (1992)
Crankshaft: Testing and Inspection
ORIENTATION OF CRANKSHAFT BEARING CAPS
Main bearing cap -1- is at the oil pump end (front).
Main bearing cap -4- is at the flywheel end (rear).
NOTE:
^
Bearing shells must be reinstalled in their original location and orientation.
^
Always label the bearing shells according to their installed position before removing.
^
NEVER interchange used bearing shells.
CHECKING AXIAL CLEARANCE
1. Install a suitable dial indicator with holder tool No. VW 387, or equivalent, on oil pump and set indicator against crankshaft counterweight.
2. Press crankshaft against dial indicator by hand.
3. Set dial gauge to zero.
4. Press crankshaft away from dial indicator and read gauge.
Specifications:
New: 0.07-0.23 mm (0.0027-0.0091 inch).
Wear limit: 0.25 mm (0.0098 inch).
CHECKING RADIAL CLEARANCE
NOTE: Radial clearance is measured using a suitable range of Plastigage.
1. Remove crankshaft bearing cap.
2. Clean bearing shell and crankshaft journal.
3. Place Plastigage on crankshaft journal over entire width of bearing, or in bearing shell (arrow).
4. Install crankshaft bearing cap with bearing shell and new bolts.
5. Tighten to 60 Nm (44 ft. lbs.) plus 1/2-turn 180°.
NOTE: Do NOT turn the crankshaft or allow it to rotate during the measurement with Plastigage in place.