Land Rover 4 0 4 6 V8 Engine Overhaul 3rd Edition Rover Manual

ENGINE
44
OVERHAUL Crankshaft dimensions:
Bearing journal radius - all journals except rear main
journalA= 1.90 to 2.28 mm (0.075 to 0.09 in).
Rear main bearing journal radiusB= 3.04 mm (0.12
in).
Bearing journal diameterC:
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 widthD:
Standard = 26.975 to 27.026 mm (1.061 to 1.064 in).
Bearing...

ENGINE
OVERHAUL45
Crankshaft - refit
1.Clean main bearing caps, bearing shell
recesses and mating surfaces of cylinder
block.
CAUTION: Ensure bolt holes in cylinder
block and main bearing caps are clean
and dry.
2.Fit new upper main bearing shells, with oil
holes and grooves, in cylinder block, ensuring
flanged shell is fitted in centre position.
NOTE: If crankshaft has been reground
ensure appropriate oversize bearing shells
are fitted.
3.Lubricate main bearing shells with engine oil
and position...

ENGINE
46
OVERHAUL
12.Using sequence shown, tighten bolts to:
Stage 1 - Initial torque
Main bearing cap bolts - 13.5 Nm (10 lbf.ft)
Main bearing cap side bolts - 13.5 Nm (10
lbf.ft)
Stage 2 - Final torque
Main bearing cap bolts numbers 1 to 8 - 72 Nm
(53 lbf.ft)
Main bearing cap bolts numbers 9 and 10 - 92
Nm (68 lbf.ft)
Main bearing cap side bolts 11 to 20 - 45 Nm
(33 lbf.ft)
13.Trim off excess material from rear main
bearing cap side seals.
14.Clean seal location and running surface on
crankshaft....

ENGINE
OVERHAUL47
Crankshaft end - float - check
1.Set-up DTI to measure end float.
2.Move crankshaft forwards and zero gauge.
3.Move crankshaft rearwards, record end-float
reading obtained.
Crankshaft end-float = 0.10 to 0.20 mm (0.004
to 0.008 in).
4.Remove DTI.
NOTE: Crankshaft end-float is controlled
by thrust faces on upper half of centre
main bearing shell. If crankshaft has been
reground and 0.508 mm (0.02 in) oversize main
bearing shells are to be fitted, it may be
necessary to machine thrust...

ENGINE
48
OVERHAUL Crankshaft position sensor - refit
1.Position crankshaft position sensor and spacer
- if fitted to gearbox adaptor plate, fit bolts and
tighten to 6 Nm (4 lbf.ft).