Car still over heating

JESSY MARIE

MEMBER
2001 BUICK CENTURY
V6
AUTOMATIC
140,000 MILES

Had the water pump replaced, thermostat, just had the entire head gaskets replace, and the car is still over heating within five minutes of having it run you can see the coolant at the bottom of the radiator and there is a steam pocket on the right side by the radiator, I have even went and bought radiator stop leak or fix leak and that seem to work with the car leaking, but it is still smoking and there is still a steam pocket. Would you know what else it could possibly be? The radiator looks brand new.

2 Replies

HMAC300

MECHANIC
48,601 POSTS

Feel the radiator when it overheats feel for cold spots with fans disconnected and engine off. If you feel any cold spots the radiator is no good. As well as loose fins.

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Friday, September 23rd, 2016 AT 12:02 PM

JIS001

MECHANIC
3,408 POSTS

Also make sure you have bled out the system properly. There should be a bleed valve on top of thermostat housing. Attached image. Usually the way I bleed is by using a coolant pressure leak tester. I fill the cooling system and attach tester to radiator fill. Open bleed valve and pump pressure until coolant comes out. Refill system and do it again until coolant just comes out. Refill and run vehicle and verify it is not overheating. Also make sure fans come on as well.

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