Troubleshooting - Toyota Land Cruiser 1988 Repair Manual

C0-2
COOLING SYSTEM
-Troubleshooting
TROUBLESHOOTING
Problem Possible cause Remedy
Page
Engine overheats Fan belt loose or missing Adjust or replace belt
CH-3
Dirt, leaves or insects on radiator or Clean radiator or condenser
condenser
Hoses, water pump, thermostat housing,
Repair as necessary
radiator, heater, core plugs or head gasket
leakage
Thermostat faulty Check thermostat
C0-9
Ignition timing retarded Set timing IG-11
Fluid coupling faulty Replace fluid coupling
Radiator hose plugged or rotted Replace hose
Water pump faulty Replace water pump
C0-4
Radiator plugged or cap faulty Check radiator
C0-10
Cylinder head or block cracked or plugged Repair as necessary
NOTE: The thermostat on the 3F-E engines is equipped with a by-pass valve essential to the cooling system.
Therefore, if the engine tends to overheat, removal of the thermostat will adversely effect cooling efficiency.