Inspection of Crankshaft during Overhaul of V8 Engines 35, 39, and 42
ENGINE
OVERHAUL
49
Crankshaft - remove
1. Remove flywheel or drive plate and ring gear
assembly.
2. Remove timing cover.
3. Remove timing gears.
4. Remove big-end bearings.
5. Make suitable reference marks between each
main bearing cap and cylinder block.
6. Starting at centre main bearing and working
outwards, progressively slacken then remove
10 main bearing cap bolts.
CAUTION: Keep bolts in their fitted order.
7. Remove 5 main bearing caps and bearing
shells, discard shells.
8. Lift out crankshaft and rear oil seal. Remove
and discard oil seal.
9. Remove and discard 5 bearing shells from
cylinder block.
NOTE: Main bearing shells must be
replaced whenever they are removed.
10. Remove and discard cruciform seals from rear
main bearing cap.
11. Remove Woodruff key from crankshaft.
Crankshaft - inspection
1. Clean crankshaft and blow out oil passages.
2. Support crankshaft front and rear bearing
journals on vee blocks, and using a DTI,
measure run-out on centre main bearing.
Maximum permitted run-out = 0.08 mm (0.003
in)
If run-out exceeds permitted maximum,
crankshaft is unsuitable for regrinding and
should be replaced.