Land Rover V8 engine 4.0, 4.6 litre. Manual — part 8
ENGINE
14
OVERHAUL
TIMING CHAIN AND GEARS
Sump - remove
1. Remove dipstick.
2. Remove 14 bolts and 3 nuts securing sump to
cylinder block and timing cover.
3. Taking care not to damage sealing faces,
carefully release sump from timing cover and
cylinder block.
4. Remove sump.
Timing cover - remove
NOTE: Timing cover, oil pump and oil
pressure relief valve are only supplied as
an assembly.
1. Using assistance, restrain flywheel/drive plate
and remove crankshaft pulley bolt; collect
spacer washer - if fitted.
2. Remove crankshaft pulley.
3. Remove sump.
4. Remove nut and washers securing oil pick-up
pipe to stud.
5. Remove 2 bolts securing oil pick-up pipe to oil
pump cover, withdraw pipe from cover; remove
and discard ’O’ ring.
6. Remove oil pick-up pipe, recover spacer from
stud.
ENGINE
OVERHAUL
15
7. Remove bolt securing camshaft sensor to
timing cover, withdraw sensor; remove and
discard ’O’ ring.
8. Release harness connector from mounting
bracket.
NOTE: New Range Rover timing cover
illustrated.
9. Noting their fitted position, remove 9 bolts
securing timing cover to cylinder block; remove
cover; collect camshaft sensor harness
mounting bracket.
NOTE: Timing cover is dowel located.
CAUTION: Do not attempt to remove oil
pump drive gear at this stage.
10. Remove and discard gasket.
11. Remove and discard oil seal from timing cover.
Timing gears - remove
1. Restrain camshaft gear and remove bolt
securing gear.
2. Remove timing chain and gears as an
assembly.
3. Collect Woodruff key from crankshaft.
ENGINE
16
OVERHAUL
Timing chain and gears - inspection
1. Thoroughly clean all components.
2. Inspect timing chain links and pins for wear.
3. Inspect timing chain gears for wear. Replace
components as necessary.
Timing gears - refit
1. Clean gear locations on camshaft and
crankshaft, fit Woodruff key to crankshaft.
2. Temporarily fit crankshaft gear and if
necessary, turn crankshaft to bring timing mark
on gear to the twelve o’clock position, remove
gear.
3. Temporarily fit camshaft gear.
4. Turn camshaft until mark on camshaft sprocket
is at the six o’clock position, remove gear
without moving camshaft.
ENGINE
OVERHAUL
17
5. Position timing gears on work surface with
timing marks aligned.
6. Fit timing chain around gears, keeping timing
marks aligned.
7. Fit gear and chain assembly.
NOTE: Timing marks must be facing
forwards.
8. Fit camshaft gear bolt, restrain camshaft gear
and tighten bolt to 50 Nm (37 lbf.ft).
Timing cover - refit
NOTE: Timing cover, oil pump and oil
pressure relief valve are only supplied as
an assembly.
1. Clean sealant from threads of timing cover
bolts.
2. Clean all traces of gasket material from mating
faces of timing cover and cylinder block.
CAUTION: Use a plastic scraper.
3. Clean oil seal location in timing cover.
4. Lubricate oil pump gears and oil seal recesses
in timing cover with engine oil.
5. Apply Hylosil jointing compound to new timing
cover gasket, position gasket to cylinder block.
6. Locate tool LRT-12-090 on timing cover and
oil pump drive gear.
7. Position timing cover to cylinder block and at
the same time, rotate tool LRT-12-090 until
drive gear keyway is aligned with Woodruff
key.
8. Fit timing cover to cylinder block.
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