Question about 2001 Oldsmobile Alero
Start car fine, heater doesnt blow hot unless temp gauge is at halfway point and car is going at least 30 mph, then suddenly stops blowing hot air and temp gauge spikes all way up to red. i have already changed the thermostat.
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Posted on Jan 02, 2017
as long as the engine temperature is normal, i would suspect a clogged heater core, the dex-cool antifreeze is notorious for building up deposits in cooling system. have heater core flushed first to see if it makes any difference
Posted on Nov 16, 2008
It sounds like a thermostat.... $100-$150 repair shop.........$20 part if you do it yourself !
Go to an auto parts store and have them read your codes to determine why the Check Engine Light is on and to confirm any problems. Advanced Auto Parts will usually do this for free!
Did you check the fuses usually located under the dash on the drivers side or under the hood?
Posted on Jan 21, 2009
Head gasket. The reason for the cold then hot readings is the cooling system is getting gas bound by exhaust gases. A simple intake leak would just make you loose fluid, but wouldn't cause the other symptoms until the coolant was very low. Which leads me to, is the coolant full? The head gasket most of the time will not leak coolant into the oil, but instead coolant will go into the combustion chamber, and exhaust gasses will go into the coolant. You don't see any white smoke until the leak gets extreme. Then shortly after that the engine hydro locks from too much coolant in the combustion chamber. There is a tester that will test your coolant for CO gas. That is the proof of a head gasket leak.
Posted on Feb 09, 2009
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