99 deville. surge tank that holds coolant and water. i add to it often and check coolant level comes on often too. is that a guaranteed head gasket leak?
A head gasket leak is usually indicated (among other things) by continous overheating of the motor, and subsequent loss of coolant.
It can also be indicated by the presence of engine combustion gas bubbles in the coolant resevoir.
Ensure the coolant system has no external leaks, such as faulty hose/s, radiator etc.
Ensure motor tune or other motor mechanical condition is not the cause of overheating.
I assume the motor is actually running hot.
Check cooling fans are operating ok (as necessary when car warms up):- if not check
1) fuse,
2) relay operation,
3) heat sensor switch.
Check/replace the thermostat,
Check the coolant pressure cap is serviceable & of correct rating,
Ensure cooling system is correctly filled, bleed off any airlocks as necessary when re-filling,
Ensure radiator hose on suction side of waterpump is not collapsing at engine revs above idle (due softening),
If the motor has been severely overheated, the head gasket could be blown - look for combustion gas bubbles in the coolant resevoir.
Testimonial: "thx..my car is not overheating.only had to pull off road once.it does get to 233 sometime."
No,it can be a number of things,it can be a leaking water pump,a leaking radiator,a pin hole in a hose,intake gasket leak,the best thing to do is to fill the cooleant system and let it run till warm and look for a puddle under the vehicle.the water pump is on the drivers side at the end of the valve cover and is run off the small belt u can see there,hope this helps
I want to buy a 99 cadillac deville and I was told it was only a head gasket problem (blown) what other items should I review before purchasing this vehicle. The owner claims she never let the car overheat and had all the maintenance done on the vehicle. Also, is this a common problem with vehicles of this year?
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