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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-14-2006, 07:55 PM   #1
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Default AC shop question

when you get a AC overhaul new compressor whole nine yards are they supposed to drain some coolant from the resivor tank and radiator?
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Old 11-14-2006, 08:03 PM   #2
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I don't see why they would have to. A/C has it'* own "radiator" and is seperate from the cooling system.

Please explain what happened.
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Old 11-14-2006, 08:27 PM   #3
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2 months ago i had the coolant elbow fixed at the dealership and they filled it up with coolant. i watched it for about a week and no problems they purged or bleed the system well. Now about a month ago my ac compressor basicly blew up. I took it to the shop who fixed it last year and they put a new ac compressor on and in five minutes that one literally blew up. they called and told me that the problem was a pressure sensor. so they put the new pressure sensor and ac compressor on; no problems. today i pop my hood for the first time since and my coolant is no longer in the reservoir tank and is very low in the radiator. i dont think this is a case of the cooling system filling up the engine block and needing more, i think they did something to the car at the shop in which they had to drain my system. they had the car for a week. the ac job is tops a 5 hr job. to really understand my situation go into general chat and read bad ac experience.
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Old 11-14-2006, 08:43 PM   #4
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They may have not burped the cooling system properly. These 3800'* are tricky when it comes to flushing and refilling it.

Top it off, keep an eye on it. At the same time, keep an eye on your oil for coolant.
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Old 11-14-2006, 09:50 PM   #5
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To work on the AC, the cooling system should not be touched. Actually it'* not close enough and had nothing to do with the AC system, unless they replaced your condenser. The condensor is the "radiator looking" part of the AC system in front of the radiator.

Being a 95, have you ever had any issues with your upper intake manifold or lower intake manifold gaskets?

I suspect that the car may start to run bad very soon if this is the upper intake failure.

http://www.bonnevilleclub.com/forum/...e=article&k=38

In the future, please keep posts about the same subject together in one thread. It makes it much easier to follow.
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Old 11-14-2006, 10:43 PM   #6
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thats the thing this is the same subject what im trying to say is two months ago i had a slow coolant leak at the coolant elbow and plenium gaskets and had it fixed at the pontiac dealership; they flushed refilled burped, whole nine yards. Now i kept an eye on the backflow tank for about a week and no change if was fully burped. So no problems with the cooling system; the dealership did a good job. Now heres the seperate job. 2 months later My ac compressor blew up i took it to a different shop not the dealership and they replaced the compressor it took them about a week. That sounds very long for this job. Anyway today i looked under my hood just for a routine visual check and noticed that backflow reservior tank was completely empty and that my radiator was about 3/4 full. Mind you this is the first time looking under the hood since i had the AC job done about a month ago. I think when they were fixing the ac system they did something wrong that effected the cooling system, not sure what they could have done but i dont understand why it was empty. The only reason i mention the dealership job is because i was wondering if it is possible for the system to esstentialy take a hole reservior tank full of coolant after i kept an eye on it for a week and no change? i want to get your guys opinion if you think the shop that did my ac messed up somehow affecting the cooling system or if my cooling tank being empty is related to the dealership job. also i went back today to get my dirt/water shield on the bottom of my car and the maxifuse relay cover they forgot to put these back on. ALL these things are making me question their work. So is there something like a mistake you could do when fixing the ac system that would damage the cooling system causing them to have to drain it or empty some.
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Old 11-14-2006, 10:51 PM   #7
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this is why im so confused, im thnking my coolant should not be low it was fine before it went into the shop for the ac repair and that was about 2 months after the dealership fixed the coolant leak. and since the cooling system and ac system are seperate systems this was another reason why i dont understand why the coolant was low. So i am coming to the conclusion that the shop messed up real bad and never bother'd to fill my system up or did fill it up but never burped it and im pretty sure i dont have another coolant leak i would have noticed it.
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Old 11-14-2006, 11:56 PM   #8
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Quote:
Originally Posted by wf2tm51
So is there something like a mistake you could do when fixing the ac system that would damage the cooling system causing them to have to drain it or empty some.
Well, you do have 2 A/C lines that run right next to the lower radiator hose. Possible they might have *cough* cut one.

As I have said earlier... top it off, keep an eye on it, keep an eye on the oil and check back in with us. Best we can do for now until we can deterimine if it is leaking or not.
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Old 11-15-2006, 12:24 AM   #9
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i toped it off around 7 and checked on the ground under my car around 10:30 and no puddle so thats good for now but how do i know if the coolant is mixed with the oil
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Old 11-15-2006, 12:25 AM   #10
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thanks so far i will check that hose cause i will know if they replaced it because that hose was an original according to my uncle, the family mechanic
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