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

ENGINE
34
OVERHAUL Flywheel and starter ring gear - inspection
1.Inspect flywheel face for cracks, scores and
overheating. The flywheel can be refaced on
the clutch face providing thickness does not go
below minimum.
Flywheel minimum thicknessA= 40.45 mm
(1.6 in)
2.Inspect starter ring gear for worn, chipped and
broken teeth.
CAUTION: Do not attempt to remove
reluctor ring.
3.Renew starter ring gear if necessary.Starter ring gear - renew
1.Drill a 6 mm (0.250 in) diameter hole at root of
2 teeth....

ENGINE
OVERHAUL35
5.Heat new ring gear uniformly to between 170°
and 175°C (340°and 350°F).
CAUTION: Do not exceed this
temperature.
WARNING: Take care when handling hot
ring gear.
6.Locate ring gear on flywheel with chamfered
inner diameter towards flywheel flange.
NOTE: If ring gear is chamfered on both
sides, it can be fitted either way round.
7.Press ring gear on to flywheel until it butts
against flywheel flange.
8.Allow flywheel to air cool.Flywheel - refit
1.Fit flywheel and locate on 2 dowels....

ENGINE
36
OVERHAUL DRIVE PLATE AND RING GEAR ASSEMBLY
Drive plate and ring gear assembly - remove - Up
to engine nos. 42D00593A and 46D00450A
1.Suitably identify each component to its fitted
position.
NOTE: 4.0 litre drive plate illustrated.
2.Remove 4 bolts securing drive plate assembly.
3.Remove buttress ring and drive plate
assembly.
NOTE: Drive plate assembly is dowel
located.
4.Remove 6 socket head cap screws securing
hub aligner to crankshaft, remove hub aligner
and selective shim; retain shim....

ENGINE
OVERHAUL37
Drive plate and ring gear - inspection
1.Inspect drive plate for cracks and distortion.
2.Renew drive plate if necessary.
3.Inspect ring gear for worn, chipped and broken
teeth.
4.Renew ring gear assembly if necessary.Drive plate and ring gear assembly - refit - Up to
engine nos. 42D00593A and 46D00450A
CAUTION: To prevent distortion to drive
plate when bolted to torque converter,
drive plate setting height must be checked
as follows:
1.Fit original selective shim and hub aligner, fit...

ENGINE
38
OVERHAUL 5.Measure existing shim and, if necessary, select
appropriate shim to achieve setting height.
Shims available:
1.20 - 1.25mm (0.048 to 0.050 in)
1.30 - 1.35mm (0.051 to 0.053 in)
1.40 - 1.45mm (0.055 to 0.057 in)
1.50 - 1.55mm (0.059 to 0.061 in)
1.60 - 1.65mm (0.063 to 0.065 in)
1.70 - 1.75mm (0.067 to 0.070 in)
1.80 - 1.85mm (0.071 to 0.073 in)
1.90 - 1.95mm (0.075 to 0.077 in)
2.00 - 2.05mm (0.079 to 0.081 in)
2.10 - 2.15mm (0.083 to 0.085 in)
6.Fit shim selected, fit hub aligner;...

ENGINE
OVERHAUL39
CRANKSHAFT, MAIN AND BIG-END BEARINGS
Big-end bearings - remove
1.Remove sump.
2.Remove nut and washers securing oil pick-up
pipe to stud.
3.Remove 2 bolts securing oil pick-up pipe to oil
pump cover, withdraw pipe from cover; remove
and discard O ring.
4.Remove oil pick-up pipe, recover spacer from
stud.
5.Suitably identify bearing caps to their
respective connecting rods.
6.Remove 2 bolts securing each bearing cap.
7.Remove bearing cap and bearing shell.
NOTE: Keep bearing caps and...

ENGINE
40
OVERHAUL Big-end bearings - refit
1.Fit bearing shells to each connecting rod.
NOTE: Big-end bearings are available in
0.254 mm (0.01 in) and 0.508 mm (0.02 in)
oversizes.
2.Lubricate bearing shells and crankshaft
journals with engine oil.
3.Pull connecting rods on to crankshaft journals.
4.Fit bearing shells to each big-end bearing cap.
NOTE: If crankshaft has been reground,
ensure appropriate oversize bearing shells
are fitted.
5.Lubricate bearing shells and fit bearing caps
ensuring...

ENGINE
OVERHAUL41
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.Starting at centre main bearing and working
outwards, progressively slacken then remove 5
LH side...

ENGINE
42
OVERHAUL Knock sensor - remove
1.Remove knock sensor from cylinder block.Crankshaft position sensor - remove
1.Remove 2 bolts securing crankshaft position
sensor to gearbox adaptor plate, remove
sensor; collect spacer - if fitted. 

ENGINE
OVERHAUL43
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.
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...