The causes for problems not requiring disassembly of the cooling system include the following items:
• Large obstructions in the airflow path of the radiator:
– An add-on auxiliary oil cooler
• Remove or relocate.
– Additional license plates
• Remove or relocate.
– Grille-mounted spare tire
• Remove or relocate.
– Ice, snow or mud in grille
• Remove.
– Fog or driving lights mounted in bumper cut-outs.
• Remove or relocate.
• Engine oil level too high
– Check and drain to proper level.
• Wrong radiator for application
– Install correct radiator.
• Loose, damaged or missing air baffle and seals
– Repair or replace parts.
• Incorrect fuel injection timing
– Adjust timing to correct specification.
The causes for problems requiring disassembly of the cooling system include the following items:
• Incorrect or damaged cooling fan
– Replace with new part.
• Incorrect cooling system pressure
– Check and repair or replace parts.
• Defective water pump (impeller vanes, bearing or seal)
– Replace with new part.
• Plugged radiator tubes
– Remove for flow check and repair.
• Internal engine coolant leaks (cylinder case/cylinder heads/front cover)
– Disassemble, inspect and replace damaged parts.
• Plugged cylinder head coolant passages
– Disassemble, inspect and replace cylinder head.
