Recent Service Or Accident Repair:
Determine if any recent service has been performed on vehicle that may affect the cooling system. This may be:
- Engine adjustments (incorrect timing)
- Slipping engine accessory drive belt(s)
- Brakes (possibly dragging)
- Changed parts. Incorrect water pump or pump rotating in wrong direction due to belt not correctly routed
- Reconditioned radiator or cooling system refilling (possibly under filled or air trapped in system).
- Service to electrically controlled viscous fan clutch
NOTE:
If investigation reveals none of the previous items as a cause for an engine overheating complaint, refer to DIAGNOSIS AND TESTING .