1990 Plymouth Acclaim 6 cyl Front Wheel Drive Automatic 170000 miles
i was driving home in cold weather and heard a noise and heater stopped working. Blew out cold air, do you think my thermostet went out.I didnt see a lot of steam but my temperature gauge was going crazy.
I discoverd a little antifreeze came out but did not see any hose leaks. Dad told me it probably blew out my radiator cap. What do you think I shoul do?
First be sure the car is full of coolant before worrying about the heater. No coolant in the heater core can cause a no-heat condiditon, and if you temp gauge was going crazy I would start there. What did the noise sound like? Does the sound of your heater blower stay the same if you select cold or hot? The sound of themotor should be a little different when in hot or cold, this will tell if the blend door is working
January, 16, 2009 AT 7:27 AM
To better assist you is your model just an Acclaim or is it a LE or LX?
So you don't see any leaks at all? Is your coolant at the correct level when the car is at operating temperature? Please check it
At operating temperature - heater on full high please check both the heater hoses that go into the fire wall to see if they are both hot or is one hot and one not>
Did you look at your cap - how is it?
Do you see any leaks since the car has been sitting?
Is there any smoke out the tail pipe if so what color?
Is the temp gauge still erratic?
Is there any coolant around your water pump or leaking from it
What are the condition of your drive belts - are they still connected and in good condition?
January, 16, 2009 AT 10:26 AM
The more I think about it since you heard a noise and the temp gauge went a little crazy and the heater stopped blowing hot.I would definitely check your belts. I know I suggested that already by check them all really good. The noise you hear may have been the belt braking and hitting the bottom of the hood or something, then that stops the water pump from turning. Thus no more heater and the temp will go crazy. And then only thing that did not allow you to overheat was the cold outside air.
I may be off here, but definitely check those belts.