Range Rover P38
26
COOLING SYSTEM
NEW RANGE ROVER
2
FAULT DIAGNOSIS
Symptom - Engine Overheating, continued
POSSIBLE CAUSE
REMEDY
8. Air in cooling system.
8. Check coolant level. Run engine at fast idle (approximately 2,000
rpm) with expansion tank cap off. Top up coolant level with engine
at idle and refit expansion tank cap.
9. Air conditioning condenser fans
not operating correctly or
inoperative.
9.
See AIR CONDITIONING, Fault diagnosis.
10. Temperature gauge or sender
unit giving inaccurate readings.
10. Substitute parts and compare new readings.
11. Coolant leakage across
cylinder head gasket.
11. Carry out cylinder pressure test to determine if pressure is leaking
into cooling system, causing over pressurising and loss of coolant.
Renew cylinder head gasket.
12. Engine oil contamination of
cooling system due to leaking.
12. Renew cylinder head gasket.
See ENGINE, Repair.
13. Coolant contamination of
lubrication system.
13. Renew inlet manifold or front cover gaskets.
See MANIFOLD AND
EXHAUST SYSTEM, Repair. or See ENGINE, Repair.
Symptom - Engine Runs Cold
POSSIBLE CAUSE
REMEDY
1. Thermostat seized in open or
partially open position.
1. Remove thermostat housing and check operation of thermostat.
Renew, if necessary.
See Repair.
2. Temperature gauge or sender
unit giving inaccurate readings.
2. Substitute parts and compare new readings.
3. Viscous fan not operating
correctly.
3. Renew viscous fan unit.
See Repair.
4. Air conditioning condenser fans
operating continuously.
4. Refer to TestBook .