Question about 1994 Oldsmobile Cutlass Supreme

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94 cutlass supreme is overheating,all fluids are fine. I did have someone tell me i need 3 motor mounts replaced. could this be an issue of the car overheating?

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  • Oldsmobile Master
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Over heating can be caused by a faulty thermostat and or weak water pump and dirty radiator and old antifreeze or the radiator fan now working when at idle but should not over heat when driving. Service the cooling system if it has never been serviced before. Replace the thermostat, buy some radiator flush to clean out the radiator and heater core. Just follow the instruction and replace the antifreeze and make sure it's a 50/50 mix water/antifreeze. If you not sure how to mix it 50/50 you can buy them 50/50 premixed. Water boils at 100'C so you need antifreeze mixed with it but antifreeze does not have the same heat transfer as water so you cannot run 100% antifreeze cause it does not transfer heat fast enough and you over heat. Good luck and hope this helps. Keep me posted, Be glad to help, once you service the cooling system and your still over heating, then we look at the water pump.

Posted on Jun 16, 2009

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  • Oldsmobile Master
  • 14,036 Answers

Bad engine mounts will put strain on cv joints.replace the thermostat.also check to see if coolant fans are working. run a jumper wire from battery to coolant fan .use another wire for ground .or you can go to salvage yard get the same coolant fan wire connector so you wont short out something.if fan work.your coolant temperature sensor is bad or relay.you can check coolant temperature sensor with scanner .if your engine is 190.degrees your scanner will show if your sensor reading the same.if coolant sensor reads 60 degrees and your engine is hot.sensor is bad.now you can check coolant fan relay hooking relay terminal 86 to battery and terminal 85 to ground. if it click its working if not replace it.

Posted on Jun 16, 2009

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