Engine Overhaul Manual: Crankshaft Inspection | Page 113
ENGINE
OVERHAUL
49
3. Measure each journal for overall wear and
ovality, take 3 measurements at 120
°
intervals
at each end and centre of journals.
Main bearing journal diameter = 63.487 to
63.500 mm (2.499 to 2.52 in)
Maximum out of round = 0.040 mm (0.002 in).
Big-end bearing journal diameter = 55.500 to
55.513 mm (2.20 to 2.22 in)
Maximum out of round = 0.040 mm (0.002 in).
If measurements exceed permitted maximum,
regrind or fit new crankshaft.
NOTE: Ovality checks should be made at
120
°
intervals around each journal.
Crankshaft main and big-end bearings are
available in 0.254 mm (0.01 in) and 0.508 mm
(0.02 in) oversizes.
Crankshaft dimensions:
Bearing journal radius - all journals except rear main
journal A = 1.90 to 2.28 mm (0.075 to 0.09 in).
Rear main bearing journal radius B = 3.04 mm (0.12
in).
Bearing journal diameter C:
Standard = 63.487 to 63.500 mm (2.499 to 2.52 in).
0.254 mm (0.01 in) undersize = 63.233 to 63.246
mm (2.511 to 2.512 in).
0.508 mm (0.02 in) undersize = 62.979 to 62.992
mm (2.509 to 2.510 in).
Bearing journal width D:
Standard = 26.975 to 27.026 mm (1.061 to 1.064 in).
Bearing journal diameter E:
Standard = 55.500 to 55.513 mm (2.20 to 2.22 in).
0.254 mm (0.01 in) undersize = 55.246 to 55.259
mm (2.17 to 2.18 in).
0.508 mm (0.02 in) undersize = 54.992 to 55.005
mm (2.16 to 2.165 in).
CAUTION: if crankshaft is to be replaced,
ensure replacement is correct for engine
being overhauled. Crankshafts are not
interchangeable between 4.0 and 4.6 litre
engines.
1. Check crankshaft spigot bearing for wear,
renew if necessary.
