Having problems with your 1998 Cadillac DeVille ?

Keeps running hot replaced the water pump and the thermostat

Posted / edited by AnonymousUser on : 11-12-2017

Answers :

The Northstar engine in this model is bad to blow head gaskets. Pressure from a cylinder will overpressure the coolant system and all the coolant will blow out. When that happens the engine will overheat. I fixed mine but it cost about $1500 in parts and tools and 5 weeks. If your coolant level is fine, check your fans and your radiator. One fan will come on when the AC is on or around 230 degrees F I think-They are designed to run hot.
Repair Help & Product Troubleshooting for 1998 Cadillac DeVille

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