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1990 Oldsmobile Cutlass A/C

Tiny
SETH.CORDES
  • MEMBER
  • 1990 OLDSMOBILE CUTLASS
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 141,000 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.
Wednesday, May 20th, 2009 AT 10:31 PM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
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.
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Wednesday, May 27th, 2009 AT 7:19 AM
Tiny
SETH.CORDES
  • MEMBER
  • 9 POSTS
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?
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Wednesday, May 27th, 2009 AT 9:44 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
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.
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Wednesday, May 27th, 2009 AT 1:18 PM
Tiny
SETH.CORDES
  • MEMBER
  • 9 POSTS
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?
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Thursday, May 28th, 2009 AT 10:10 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
The heater core won't cause the engine to overheat.

Let me know how things go after the radiator is replaced.
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Thursday, May 28th, 2009 AT 10:12 AM
Tiny
JUSTDON
  • MEMBER
  • 150 POSTS
Since the fan is now wired to a switch, it may also be a good time to replace the relay.
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Wednesday, June 3rd, 2009 AT 12:14 AM
Tiny
SETH.CORDES
  • MEMBER
  • 9 POSTS
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.
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Friday, July 3rd, 2009 AT 7:48 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
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.
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Friday, July 3rd, 2009 AT 7:59 PM
Tiny
SETH.CORDES
  • MEMBER
  • 9 POSTS
I will check the compression and service the tranny. And see how that does. Thank you for your input.
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Saturday, July 4th, 2009 AT 2:59 PM
Tiny
SETH.CORDES
  • MEMBER
  • 9 POSTS
I did the compression test 1- 98psi 2-100psi 3-102psi 4-99psi 5-100psi 6-101psi. That seems good I looked and it said all should be 100 psi. I had my tranny serviced and the car stays cool the temp light wont come on but when I shut the car off after driving for awhile it is boiling or bubbling in to the reserve coolant tank. What dose that mean?
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Tuesday, July 14th, 2009 AT 5:44 PM

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