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Cadillac Repair/'95 Cadillac Deville
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Question
My '95 deville was just in the shop, I had to replace my compressor. When we picked it up our heat and ac was now working which it was not prior. On the first day the car overheated, not a problem we have previously. but the car did sit for a few months before we replaced the compressor. Could this be a problem with the thermostat?
Hello,
The a/c system and the cooling system are two separate entities. A a/c compressor by itself should have nothing to with an over heating event in the cooling system, but then I don't know if the cooling system was compromised for some reason to change the compressor.
The compressor is mounted to the engine and the serpentine belt goes around the pulley as it does the power steering, the alternator and water pump.
I don't really know how without seeing it, but possibly an over heating issue could have developed by not getting the belt around the water pump possibly. The only reason I throw that out is that you did not have a problem before. The compressor was replaced and the belt working the water pump could have a direct correlation to the over heating. Possibly, the belt installation has the pump running backwards and is not cooling the engine. Of course this is just a guess and I don't know, but it gives you something to think about.
Why would you need to change the thermostat out of the blue?
Here is your more dire problem: you have one of those finely engineered aluminum engines and this is not like a cast iron engine. It cannot hold up to any overheating and you are destroying the engine (it's melting) driving it overheated. If you blow out the head gaskets which you will, not worth changing because there are commonly more mitigating issues. All the engines in the junk yards have been over heated and they are junk as well, so you can't go used engine either meaning replacement will cost you more than the car is worth with a brand new engine.
Stop driving immediately and have towed back to mechanic. Something is not right and all you will get is a very costly expense. Look in my archives for over heating on this engine.
http://www.autotheftexpert.com
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| Comment | thank you very much Rob for your insight. I do appericate it. It gives me somethings to look into and I will give all the info to my husband who knows alot more then I do about cars. | ||
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Rob Painter
Expertise
Alarm system questions cannot be answered on this forum. These systems are not what I can answer. Without being physically at the vehicle and not knowing what kind of electrical service has been done on the vehicle, there is no possible way to give an accurate answer over the internet. My expertise is in Ignition/key based anti-theft systems. These issues include GM VATS (resistor chip in key blade) PASSLOCK (MRD)-ignition lock rotation based, no special ignition key and the PKIII Transponder (computer chip in key) systems. These systems are not alarm based and are integral with the starting of the engine. This is why I cannot diagnose alarm problems without physically looking at the vehicle: Alarm systems are a completely different annimal than ignition key/lock based anti-theft system. Many alarm questions come from vehicles 10 years old, and since older, many hands that had been involved over the years.I am an expert in all GM factory (ignition/key based)systems. Alarm system questions pose to many situations beyond my knowledge as to what has been done to the vehicle over the years. Some guy may have actually wired the stereo into the alarm system. Who knows? Over my past 30 years in vehicle wiring repair, I have seen unbelievable wiring disaters done by guys that consider themselves "mechanics." I have seen stereos and alarms intalled using surgical tape. I have seen modules burn up, un-fused circuits, wiring jambed between the doors and even lamp cord used for a starter kill. To answer alarm questions over the internet without examining the vehicle is like asking; What does it take to remove a dent?
Experience
Education/Credentials-ASE certified. 11 years with a GM dealer and 17 years with a repair facility dealing with only the repair of theft recovered vehicles.
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