1990 Oldsmobile Cutlass a/c

seth.cordes · Posted at Wed May 20, 2009 7:31 pm

Air Conditioning problem
1990 Oldsmobile Cutlass 6 cyl Front Wheel Drive Automatic 141000 miles

i filled my car with 134b refriderant and the car over heated when i drove the next time did i use the worng kind of refriderant. or could it just be my thermostat. my heat also takes a very long time to kick in.

Jacobandnickolas · Posted at Wed May 27, 2009 4:19 am

Recharging the AC had nothing to do with the car overheating. If the cooling fan comes on and the car still overheats, chances are you have a bad thermostat or a plugged radiator.

seth.cordes · Posted at Wed May 27, 2009 6:44 am

i replaced the thermostat it was stuck open. flushed and filled the system. the fan dose not come on so i hard wired it to a togle switch and it turns on and seemed to keep car cool but the next morning i had a big puddle of coolent on the floor the whole sytem drained out. and the radiator has a very big crack on the bottom. if i buy and replace the radiator with a new one will that solve my problem?

Jacobandnickolas · Posted at Wed May 27, 2009 10:18 am

If the radiator is cracked, it will need replaced regardless. However, if it didn't overheat before the coolant leaked, a new radiator should take care of the problem.

seth.cordes · Posted at Thu May 28, 2009 7:10 am

i will replace the radiator and get back to you about it. a friend of mine has told me it could be the heater core also, would that efect the temp of the engine?

Jacobandnickolas · Posted at Thu May 28, 2009 7:12 am

The heater core won't cause the engine to overheat.

Let me know how things go after the radiator is replaced.

justdon · Posted at Tue Jun 02, 2009 9:14 pm

Since the fan is now wired to a switch, it may also be a good time to replace the relay.

seth.cordes · Posted at Fri Jul 03, 2009 4:48 pm

i have changed the radiator and the coolant. it overheats with about a half hour of driving. the transmission fluid is very dark looks a lot like oil. would that help the motor stay cool if i change that. also when it over heats the temp light dose not come on for awhile but i can here it boil in to the reserve tank before it gets to hot. thank you for your input it has helped a lot so far.

Jacobandnickolas · Posted at Fri Jul 03, 2009 4:59 pm

You've done it all. The only other thing I can think if is a bad head gasket. Have you ever checked compression to make sure you don't have a weak cylender?

As far as the transmission, it won't cause the engine to overheat, but you should have it serviced.

seth.cordes · Posted at Sat Jul 04, 2009 11:59 am

i will check the compression and service the tranny. and see how that does. thank you for your input.