1992 Cadillac El Dorado



August, 29, 2007 AT 9:20 AM

Dear Sirs, I bought this vehicle three weeks ago. It had been parked for the past four years. It has 133,000 miles and powered by a 4.9 liter V-8. I put a new battery in it along with a tank full of premium and it fired right up. It runs excellent. The motor is very strong. I then changed the oil with synthetic oil, and replaced the oil filter along with the air filter. I then drove from Las Vegas to Phoenix. The air conditioner did not work, so when I got to Phoenix I checked the fuses and replaced the relays for the blower and A/C compressor. The clutch on the A/C compressor was not kicking on. I then oil charged the system and added freon. It still did not work. I crawled under it and pushed on the electrical connection going to the compressor. It now kicked on. After driving it a mile or so, the engine temp. Read 250 degrees F. I then pulled out the 195 degree thermostat and could only find a 180 degree thermostat for it. I flushed the cooling system and added a 50/50 ratio of anti-freeze to the radiator. I also bought a new radiator cap, and installed it. (16lbs. Cap) throughout driving the next 200 miles, the A/C would come out of the bi-level vents and change to the front windshield vents on its own, all the while it would stop working all together. I would pull over, wiggle the electrical connection goint to the compressor and it would work till I hit a few bumps. It will no longer come on. I pulled the serpentine belt and checked the compressor to see if it froze up. It still spins. Also, my engine temprature would run between 200-232 degress F. I dont have alot of money and my tools are limited. I am miserable driving to and from work, as the daytime temp. Is averaging 110 degrees F. Is there a special anti-freeze called dex-cool that is supposed to be in my radiator? Along with a sealer from Cadillac? It says nothing of the sort under the hood anywhere. I just used Peak. Could this be part of my problem? Also, the clip for the electrical connection going to the comp. Looks as if somebody rigged a different one on. There is also a white plastic thing that both of those wires go through located about a inch from the clip. Is this supposed to be there? If so, what is it and what does it do. I don't know much about cars but it seems to me that the electric cooling fan is not working proper. Is there a way I can check this? As you can probally tell, I have a mess. Working with limited knowledge and funds does not help. Im not stupid, if you explain to me what I should do, I can follow instructions. I will be able to make a donation after the 8th of next month. That is when I will receive my first check. &Quot; PLEASE HELP" Thank you in advance, peevola


2 Answers



September, 2, 2007 AT 12:08 AM

Okay Mr. P

I heard all the problems so here it goes: Coolant: You must use engine coolant approved type for use on aluminum engines and engine supplement 3634621 in cooling system or engine damage will occur. Btw did you bleed the air out of the cooling system.

AC: if you can get it to work dinking around with it-could be bad connections, recheck the relay-not it could be the PCM not commanding the compressor.

Cooling fans not working properly-could be a temperature switch/relay/s or the CTS.

Good Luck



September, 17, 2007 AT 3:26 PM

A 92 doesnt use dex-coolant only 2000 and above

put a new connector on the compressor, sometimes the clutch rubbs the connector, get it from cadillac if it runs when you wiggle it

running in that heat it will run a little hotter, look down in the radiator and see if some of the cooling passages might be clogged

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