Discovery I (LJ) V8-4.0L (1996)
Crankshaft: Testing and Inspection
Crankshaft Bearing Inspection
1. Clean crankshaft and blow out oil passages.
2. Support crankshaft front and rear bearing journals on V-blocks, and using a DTI (Dial Indicator), measure run-out on center main bearing.
Maximum permitted run-out: 0.08 mm.
If run-out exceeds permitted maximum, crankshaft is unsuitable for regrinding and should be replaced.
3. Measure each journal for overall wear and ovality.
Main bearing journal diameter: 63.487 to 63.500 mm
Maximum out of round: 0.040 mm.
Connecting rod bearing journal diameter: 55.500 to 55.513 mm
Maximum out of round: 0.040 mm.
If measurements exceed permitted maximum, regrind or install new crankshaft.
NOTE:
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Ovality checks should be made at 120° intervals around each journal.
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Crankshaft main and connecting rod bearings are available in 0.254 mm and 0.508 mm oversizes.