Having problems with your 1998 Cadillac DeVille ?

My 1998 deville is overheating, I have had the h20 pump replaced last summer, could it be the thermostat or the headgasket? there is no leakage that I see.

Posted / edited by AnonymousUser on : 18-03-2019

Answers :

I assume motor tune or other mechanical condition is not causing the problem.
\015\012Yes, the thermostat is a common cause of overheating - replace the thermostat.
\015\012Check operation of the radiator cooling fans is ok.
\015\012Check the coolant pressure cap is serviceable & of correct rating,
\015\012Ensure cooling system is correctly filled, bleed off any airlocks as necessary,
\015\012Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
\015\012Check radiator cooling core is not blocked internally or externally.
\015\012 If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.
Repair Help & Product Troubleshooting for 1998 Cadillac DeVille

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