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


(1999 Oldsmobile Cutlass)
in Fairfax, VA on August 18, 2009
I just got a 99 cutlass. It has 150,000 miles on it. The temperature gague shows it going almost, but not in, the red. The thermostat was replaced, the coolant system was flushed, and the mechanic said the pressure test didn't show anything, but it still looks like it is running hot. Any ideas?
Displaying 5 answers & 1 comment
Popular Answer
on August 18, 2009
Check the radiator and the radiator fan operation. Have the shop use an infrared temperature gun to determine that the engine is actually running hot, it could be a gauge or sensor problem too. Good Luck, let us know what they end up finding out!
Sign in to reply
I agree with Laurenceg. I would also ask a shop to check that the radiator is not internally restricted, check that the cooling fan is operating correctly and do a "block check" (which is a chemical check to test for the presence of carbon monoxide in the cooling system which would only be present in the case of a blown or slightly blown head gasket). Would love to know what turns out to be the problem.
Sign in to reply
on March 11, 2011
i agree with u on this one Patrick i also have a 1999 cutlass had the same problem did the same thing as this guy change thermostat had system flushed worked for 3 dayz then boom busted gasket and coolant leaking everywhere.
on January 16, 2010
check to make sure the fans on the radiator are working. they should kick on once it heats up. mine just went out and i'm trying to figure out whats wrong
Sign in to reply
on March 11, 2011
check the radiator for blockage or debris. always a good thing to do. i also have a 1999 cutlass. had same problem. so i would go with patricks theory on this issue and get the head gaskets checked. cuz mine blew out and was fortunate to not have coolant get in to the oil.
Sign in to reply
on May 04, 2015
I have a 1999 cutlass as well. I bought the car from a friend at 92,000. It currently has 93,xxx. From the time i bought it the Radiator lamp was on constantly. I recently just replaced the Thermostat about 1 month ago and the light continued to stay on. And now this morning the engine over heated to the point my temp warning light went out. The werid thing is that i stopped and turned off the car out of panic and when i started it back up the temp started to decrease and then increase again but finally increaseing after about 1mile of me trying to make it back home. Any suggestions on what might be the problem
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.
I have a 2003 chrysler sebring convertible and when i got it it would overheat so i replaced the thermostat both head...
There is no sign of overheating0-gauges looks fine
Didn't find what you were looking for?