Page 202
REPAIR INSTRUCTIONS, PART 1
RUNNING CLEARANCE INSPECTION
1. Place a section of Plastigage
®
on the
connecting rod cap bearing and place the
cap and bearing in position on the rod.
2. Apply a light coat of oil on the threads of the
rod capscrews and install the screws.
3. Using a torque angle gauge and torque
wrench, tighten the screws in a cross pattern
according to specification.
4. Remove the screws and cap.
5. Measure the width of the Plastigage
®
stripe.
After determining the clearance, remove the
Plastigage
®
.
6. If the clearance is outside the specification,
correct it as required.
a. If the clearance is less than specified,
check behind the bearing for dirt, chips
or burrs which would prevent the
bearing from seating properly.
b. If the bearing bores and inserts are
clean and undamaged, replace the
inserts with inserts sized to provide the
specified clearance.
7. Install the connecting rod cap to the journal.
Make certain that the connecting rod cap and rod
are properly aligned to prevent bearing and rod
damage. Failure to heed this caution may result in
severe engine damage.
8. Lubricate the screws with clean engine oil.
9. Using a torque angle gauge and torque
wrench, install and tighten the screws in
sequence according to specification.
10. Check the connecting rod side clearance by
inserting a thickness gauge between the rod
and the side of the journal. Check along the
entire parting line area.
262
Figure 262 — Connecting Rod Side Clearance Check
11. The clearance must be within the
specification listed under Fits and Limits in
the SPECIFICATIONS section. If not,
recheck for proper cap and rod alignment.
1. Crankshaft Journal
2. Connecting Rod Bearing
Cap
3. Thickness Gauge
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