Range Rover. Manual — part 125
LAND ROVER V8
3
FAULT DIAGNOSIS
2. ENGINE OIL COOLING SYSTEM
Symptom - Engine Oil Overheating
POSSIBLE CAUSE
REMEDY
1. Air flow through oil cooler
matrix restricted or blocked.
1. Apply air pressure to engine side of radiator to clear obstruction. If
mud or dirt is evident, carefully use a hose.
2. Blocked or damaged oil cooler
or pipe/hoses restricting engine
oil flow.
2. Check for visual damage and renew components where necessary.
3. Oil cooler relief valve seized in
closed position.
3. Remove and check relief valve. Renew, if necessary.
3. GEARBOX OIL COOLING SYSTEM
SYMPTOM - Gearbox Oil Overheating
POSSIBLE CAUSE
REMEDY
1. Air flow through oil cooler
matrix restricted or blocked.
1. Apply air pressure to engine side of radiator to clear obstruction. If
mud or dirt is evident, carefully use a hose.
2. Damaged oil cooler or
pipe/hoses restricting gearbox
oil flow.
2. Check for visual damage and renew components where necessary.
3. Vehicle being driven in wrong
gear.
3. Advise owner/driver accordingly.
NOTE: Critical warning messages relating
to the complete cooling system are
displayed on the message centre in the
lower section of the instrument pack, should a
fault occur in any of the separate systems.
LAND ROVER V8
1
REPAIR
COOLANT - DRAIN AND REFILL
Service repair no - 26.10.01
Drain
WARNING: Do not remove expansion tank
filler cap when engine is hot. The cooling
system is pressurised. Personal scalding
could result.
1. Raise the vehicle.
WARNING: Support on safety stands.
2. Remove expansion tank filler cap to assist
draining.
3. Position container beneath radiator.
4. Remove plug from base of radiator. Allow
coolant to drain.
5. If system is only being partially drained, continue
at Refill.
6. Reposition container. Remove LH cylinder block
drain plug. Allow coolant to drain.
NOTE: Do not remove RH cylinder block
drain plug.
7. Clean drain plug threads. Apply a coating of
’Loctite 577’. Refit plug to block. Tighten
securely.
26
COOLING SYSTEM
NEW RANGE ROVER
2
REPAIR
Refill
8. Ensure sufficient coolant solution is available.
See LUBRICANTS, FLUIDS AND
CAPACITIES, Information.
9. Inspect radiator drain plug ’O’ ring, renew if
required.
10. Fit drain plug to radiator. Tighten to
Max 6 Nm
(4 lbf.ft)
11. Remove safety stands. Lower vehicle.
12. Disconnect radiator bleed hose at the radiator.
13. Blow through hose to clear any residual coolant.
Reconnect hose.
CAUTION: If radiator bleed hose is not
cleared of coolant, air may become
trapped at top of radiator during refill,
leading to subsequent engine overheating.
14. Fill expansion tank until coolant is level with
base of neck.
15. Start engine, continue filling at expansion tank
until coolant level stabilises at the ’COLD
LEVEL’ marking.
16. Run the engine until the thermostat opens (top
hose becomes warm).
17. Stop engine, allow to cool.
18. Check coolant level, top-up as necessary.
19. Refit expansion tank filler cap.
RADIATOR
Service repair no - 26.40.04
Remove
1. Disconnect battery negative lead.
2. Raise the vehicle.
WARNING: Support on safety stands.
3. Drain cooling system.
See this section.
4. Release clips securing upper cooling fan cowl.
Remove cowl.
5. Release top hose from radiator.
6. Release expansion tank hose from radiator.
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