Links Below: Cadillac Northstar engines are known for overheating. This Deville had a slow coolant leak & a history of overheating due to a failed water pump. How to diagnose & repair several.. The coolant comes out of the engine, into the upper hose, then down through the rediator, up through the lower hose and past the t-stat into the water pump housing.
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Explore the cooling system diagram for the 2000 Cadillac DeVille and learn how it functions to keep your engine cool and running efficiently.. The Northstar cooling system is different from the usual front-of-the-block water pump and crossovers. This engine uses a water crossover at the rear (driver's end) of the block - attached to ports on the two cylinder block banks and the cylinder heads.
![[DIAGRAM] 1999 Cadillac Deville Cooling System Diagram](https://www.2carpros.com/images/question_images/15327/original.gif "[DIAGRAM] 1999 Cadillac Deville Cooling System Diagram")
