9000 Aero L4-2290cc 2.3L DOHC Turbo EFI HO (1997)
Connecting Rod Bearing: Testing and Inspection
With Engine Removed
NOTES:
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Before the bearing clearance is checked in conjunction with the fitting of new bearings, the crankpin out-of-round and taper must be inspected.
Bearing clearance is measured using Plastigage, available in three thicknesses under part no. (45) 30 06 558. Use type PG-1 (green).
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Plastigage strips cannot be used to measure the out-of-round of big-end bearings with the pistons fitted in the block. Use a micrometer instead.
When fitting new bearings, check the big-end bearing clearance as follows:
1. Rotate the crankpin to be measured to about 60° BTDC.
2. Clean the parts to be measured, making sure that all oil and dirt is removed. Position a strip of Plastigage about 6 mm (0.20 inch) to one side of
the crankpin centre-line.
3. Fit the bearing cap, tightening it to a torque of 20 Nm (15 ft. lbs.) and then tighten through a further quarter-turn (through 90°). The crankshaft
must remain absolutely stationary during measuring.
4. Remove the bearing cap. The Plastigage strip should now be adhering either to the bearing shell or to the crankpin.
5. Measure the width of the Plastigage strip using the scale printed on the package and read off the clearance. One side of the package is calibrated in
mm and the other in thousandths of an inch. Measure the strip at its widest point, taking care not to touch it with your fingers.
