Land Rover V8 engine. Manual - part 11
ENGINE
30
OVERHAUL
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. Starting at centre main bearing and working
outwards, progressively slacken then remove
10 main bearing cap bolts.
6. Remove 5 main bearing caps and bearing
shells, retain bearings with their caps.
7. Lift out crankshaft and rear oil seal. Remove
and discard oil seal.
8. Remove 5 bearing shells from cylinder block
and retain in their fitted order.
9. Remove and discard side seals from rear main
bearing cap.
10. Remove Woodruff key from crankshaft.
Crankshaft - inspection
1. Clean crankshaft and blow out oil passages.
2. Support crankshaft front and rear bearings on
vee blocks, and using a DTI, measure run-out
on centre main bearing.
Maximum permitted run-out = 0.08 mm.
If run-out exceeds permitted maximum,
crankshaft is unsuitable for regrinding and
should be renewed.
3. Measure each journal for overall wear and
ovality.
Main bearing journal diameter = 58.409 to
58.422 mm
Maximum out of round = 0.040 mm.
Big-end bearing journal diameter = 50.800 to
50.812 mm
Maximum out of round = 0.040 mm.
If measurements exceed permitted maximum,
regrind or fit new crankshaft.
NOTE: Ovality checks should be made at
120
°
intervals around each journal.
Crankshaft main bearings are available in
0.254 mm and 0.508 mm undersizes. When fitting
0.508 mm undersize bearings, centre main
bearing, which controls crankshaft end-float, has
thrust faces increased in thickness by 0.254 mm.
Therefore if 0.508 mm undersize bearings are
fitted, 0.127 mm must be machined off each
thrust face of centre main bearing journal to
maintain correct radius.