Chris, before you change the comp. find an Indy that will just put a set of gauge's on it and read the pressure's. The low side press. is what your interested in. Depending on the ambiant temp. the pressure should be in the NEIGHBORHOOD of 38-50psi. The 2.08 that they gave you is the capacity of the system NOT the pressure. 2.08 Lbs of R134A is how much GAS should be added to a COMPLETELY empty and vacumed A/C system. If the A/C system is full of gas, you should have 38-50 psig low side and I'm GUESSING 150-200 psig high side. If these #'s are close, then you have a "Control System" problem!! If these #'s are way off, then you have a sealed system problem. Hope this helps.
Awesome, thank you for those figures, they are about to come in very handy. I am planning on taking it this week to a shop that only specializes in AC repair, and I will ask them for the high-side and low-side readings and will report back to you when I get them.
I think I will also ask them to record the readings at idle and the readings at, say, 4000rpm. That will narrow it down, if it is a compressor-clutch problem. In fairness, it does work better at higher rpm's so that might be the case. Same end result, though...I don't think anybody sells a clutch without a compressor so I'd still have to replace the whole thing.
I have got to do something, for sure. It is now officially summer in Florida and it's between 95-105 degrees every day. The car is pretty much undriveable as it sits, unless you are going somewhere where you don't mind showing up completely soaked in sweat-stains.
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"Veni, Vidi, volo in domum redire." (I came, I saw, I want to go home.)
Chris, The one thing I didn't mention is these #'s are at ABOUT 75degrees ambiant temp. The HOTTER it is, the higher the pressure will be. Not a lot higher,but higher. From your description, It ALMOST sounds like you have a leak somewhere, and the evaporator is ICING up from lack of a FULL charge. Let us know what the Indy finds.
Vehicle: 95 sl500, AMG front brakes, AMG exhaust, AMG 18's, H&R Sport Springs, K&N's - 03 xjs
Location: cheery hell
Posts: 567
Man o man here i go. Nice thread Kinda tugs at your heart strings.
I to am starting to go down the REPLACE everything that has to do with the AC system. Last year My coolant ran out and i let it go over the winter cause the Stealer said i had a leak in my compressor and not to worry and get it fixed next summer. So today i took it to my indy, NOT THE STEALER, and get a charge and the leak is actually in the Hose from the dryer. 560 just for the hose. the dryer is not so bad as for cost. Next week its all gonna go down. Thanks for this post cause it helps that others have felt the pain!
Man o man here i go. Nice thread Kinda tugs at your heart strings.
I to am starting to go down the REPLACE everything that has to do with the AC system. Last year My coolant ran out and i let it go over the winter cause the Stealer said i had a leak in my compressor and not to worry and get it fixed next summer. So today i took it to my indy, NOT THE STEALER, and get a charge and the leak is actually in the Hose from the dryer. 560 just for the hose. the dryer is not so bad as for cost. Next week its all gonna go down. Thanks for this post cause it helps that others have felt the pain!
I wish mine were just a hose. My compressor really does appear to be the problem. I have deferred dealing with it for the time being because I have a lot going on, but I will replace it before summer's out.
The indy did the same thing the dealer did, and just hooked it up to the pressure guages and told me everything's fine. Except it's not, and it doesn't work right. These people get so short-sighted, you know? I don't care what the guage says, I only care that it won't freakin' cool the car.
But the compressor's the only thing it could be at this point, since I already replaced the expansion valve and the receiver drier, I already had all the sensors gone through and ruled out icing, and there aren't any leaks or anything anywhere else (dye test). I also had it evacuated and recharged twice, and was there watching it personally, to make sure the oil charge was done right, so it's not that either. It just has to be the compressor.
Vehicle: 95 sl500, AMG front brakes, AMG exhaust, AMG 18's, H&R Sport Springs, K&N's - 03 xjs
Location: cheery hell
Posts: 567
compressor is easy in my eyes. Seems like u did all the hard stuff. I am waiting for "OK so the hose and dryer is replaced Now there is a leak in the compressor." I do trust my indy guy. I had my evaporator changed out when i bought the car not on my dime either, dealership. ANOTHER GREAT STORY VERY VERY happy about that. So i THINK i can sleep well that that will not need any work.
compressor is easy in my eyes. Seems like u did all the hard stuff. I am waiting for "OK so the hose and dryer is replaced Now there is a leak in the compressor." I do trust my indy guy. I had my evaporator changed out when i bought the car not on my dime either, dealership. ANOTHER GREAT STORY VERY VERY happy about that. So i THINK i can sleep well that that will not need any work.
Those evaporators are notorious for springing leaks, so it's good you got that out of the way already. I think you will be all set now, but still...shame on that dealer for trying to take you for $1k on a new compressor when it was just a rubber hose. I swear, doing business with some of those guys is like walking through a snake pit.
Before you guys go spend your $$ on compressors etc.
Have short the temp. sensor on the drier color RED it controls the aux. fans.
If you are happy, then replace it with a GREEN color one.
And think about all the money I have saved you.
Regards.
aam.
Vehicle: 95 sl500, AMG front brakes, AMG exhaust, AMG 18's, H&R Sport Springs, K&N's - 03 xjs
Location: cheery hell
Posts: 567
funny u should mention the Aux fans cause they are not working correctly either. That is next on the list after the ac pieces. gonna start with the aux fan fuses though.
I had AC problems in my 94 SL500 as well. What I ended up doing was to get the Nippon part number off my compressor and see if any other cars where using the same setup. Well, it turns out that a 1994 Grand Cherokee and a 1995 Vette ZR-1 uses the same compressor. I then went on E-Bay, bought a rebuildt compressor for $39,-. I had to use the main shaft from my original compressor, but otherwise they where identical. Mounted it, filled the system and it has worked for three years without a glitch. Being in Las Vegas we see 110 on a daily basis and the car is coool.. The one thing I never got to was the light bulb for the temp indicator. I took the controller out but could not see any bulbs to be replaced.
I had AC problems in my 94 SL500 as well. What I ended up doing was to get the Nippon part number off my compressor and see if any other cars where using the same setup. Well, it turns out that a 1994 Grand Cherokee and a 1995 Vette ZR-1 uses the same compressor. I then went on E-Bay, bought a rebuildt compressor for $39,-. I had to use the main shaft from my original compressor, but otherwise they where identical. Mounted it, filled the system and it has worked for three years without a glitch. Being in Las Vegas we see 110 on a daily basis and the car is coool.. The one thing I never got to was the light bulb for the temp indicator. I took the controller out but could not see any bulbs to be replaced.
What were your symptoms before you replaced the compressor?
Linear Mode
