Car Questions
RepairPal is your advocate for car care advice and guidance

Why would coolant come out of reservoir when temperature gauge just above middle

(1999 Oldsmobile Cutlass)
in Duluth, MN on August 13, 2013
I have replaced the coolant temperature sensor. The cooling fans do not come on. Have checked all fuses and relays related to the cooling fans. Have disconnected the temperature sensor while car running, both fans cotme on high. when reconnect the coolant sensor the fans stay on low, once car is turned off coolant sensor connected and restarted the fans do not cycle through and come on. I have heat. Help please
Ask a Question
Displaying 4 answers & 0 comments
Popular Answer
of Greg's Orange Auto on August 14, 2013
poss radiator cap is bad
Sign in to reply
on August 14, 2013
You need to stop driving the car. Tbone1980 is correct. Depending on how severely you have overheated the engine will determine the course of repair.
Sign in to reply
on August 14, 2013
There is a test for that before you do anything! Contact a repair shop and ask if they can do a COMBUSTION LEAK TEST, that will accurately tell if any CO is entering the cooling system, have this test performed FIRST! Also the thermostat on this engine is a pain to change, bet it has never been done! Now I assume this is the pushrod engine and not the SOHC 3.1 offered in the Cutlass/Supreme?? One more thing, have you replaced the coolant fill cap? If not do so and make sure this NEW 'threaded' cap is tight. Temp. Just above 1/2 WAY, is not HOT. Fans might come on if all this is corrected!
Sign in to reply
on August 13, 2013
unfortunately these engines are known for bad intake manifold gaskets, the coolant in the block is being over pressurized by exhaust gasses escaping into the coolant system, You will need to have the intake gaskets replaced but you may also want to replace the head gaskets as well as they may have been damaged form overheating, but first start with the easient thing and change the thermostat first,if problem continues then proceed to the head and intake gaskets...
Sign in to reply
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
This one is a doozy! help!!! the car in the winter had great heat, no problems. then when it warmed up i noticed the...
My car seems to start to overheat when in traffic, i recently replaced the coolant reservoir with new one because of ...
Didn't find what you were looking for?