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Old 10-13-2011, 03:16 PM   #1
mikeson
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I think it is AC compressor but have to ask.

Hi guys,

I drove car and feel car is weaker and turned off my CD to hear if there some noise.
after a few miles, when I stop at light, RPM drop very lower and up, it is more like up and low and up,..kind of very unstable.
So I turn off my AC and car runs very normal.

After I park, I turn car again. as soon as I turn AC, car rpm drop with grounding noise, so I step gas little bit then Big noise come and car shut off itself.

I turn AC off and turn car again, car drive normal but as soon as I turn AC, car died.

So I need AC compressor, right?
Hum,..

Thank you guys.
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Old 10-13-2011, 03:22 PM   #2
benzedid
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looks more like a relay problem. try pulling codes before going for a new AC compressor.
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Old 10-13-2011, 03:29 PM   #3
mikeson
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No code yet.
But I could hear mechanical grinding noise before car shut off itself.(when I turn on AC)
My belt is new and visually there is nothing wrong in engine room.

Where is the relay?

Anyway, thank you.
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Old 10-13-2011, 03:40 PM   #4
mikeson
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I did it again turned on to see how it goes.
It is like as soon as I turn on AC, something is holding AC compressor so that makes engine shut down. Bad. I won't do it again.

Anyway,... tried read code but no code.
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Old 10-14-2011, 04:16 AM   #5
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ok. last thing before we assume that compressor is faulty. how u checked for the compressor gas? mine used to be a little faulty coz it was like only 45% full. check that first. if u get nothing after that, then here is an AC replacement DIY http://forum.e46fanatics.com/showthread.php?t=681935
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Old 10-14-2011, 08:03 AM   #6
mikeson
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Thank you so much.
Until yesterday AC was freezing and last night when I checked it again(wife turns and I watched the compressor), as soon as turned ac button, it stop spin, and it made engine shut down.

Yes, it is compressor. And I'll do it DIY and let you guys know after I replace it.
thank you again.
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Old 10-17-2011, 12:04 PM   #7
mikeson
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Update.

I replaced mine to used ac compressor. it just came compressor(just little clean oil came out from holes)

As other people said, I went to shop to drain my ac gas, then drive home to replace the compressor. It was not difficult. but you need a 6mm hex socket.
And I replace rubber seal ring(just 2 on compressor)
Although to change a drier was recommend, I didn't change it. Anyway, my car is old.

After I just replace the AC compressor, I went to shop and vacuum and refill the gas.
Now it is cold again. NICE. I drove about 60miles this weekends with AC on and no problem so far. It is cold AC again.

However, I just find out that I have to fill compressor oil into the compressor before I replace. which I didn't.

And now I'm little worry about it and don't know what to do.
Should I reopen and fill oil and change the drier or just drive one or 2 years.
Hum,...
Anyway, it has no noise, nor problem so far.
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Last edited by mikeson; 10-17-2011 at 12:05 PM.
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Old 10-17-2011, 12:12 PM   #8
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get that oil inside before it screws up ur compressor again! u reminded me of my AC compressor. i should check for the oil too.
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Old 10-17-2011, 12:36 PM   #9
mikeson
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Hum,

However, when I check my old compressor last night to see how much oil come out, there is not much oil came out.
I put upside down(hole is down) for 2 min. and just very little oil came out from the hole and mostly of oil kept inside.
I think unless you turn the compressor, oil is not come out. And assuming that one I just replaced has oil kept inside as well.

Let see how it goes. I'll just drive as is for while.

Anyway, thank you so much for advise.
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Old 10-17-2011, 01:13 PM   #10
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Quote:
Originally Posted by mikeson View Post
Hum,

However, when I check my old compressor last night to see how much oil come out, there is not much oil came out.
I put upside down(hole is down) for 2 min. and just very little oil came out from the hole and mostly of oil kept inside.
I think unless you turn the compressor, oil is not come out. And assuming that one I just replaced has oil kept inside as well.

Let see how it goes. I'll just drive as is for while.

Anyway, thank you so much for advise.
WTF... you ask for help you get help. so instead of taking the help to keep you from having to do the same thing or deal with the same problem or even worse, you go ahead and drive with it not being seviced right. its not a cheap civic, its a bmw, even if its old, proper maintance and work will keep it running great for a long period of time. dont cheap out or be lazy, do it right. take some time to do it right to save you headaches later on or even more money.
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Old 10-17-2011, 03:09 PM   #11
mikeson
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Originally Posted by BMW-330CI View Post
WTF... you ask for help you get help. so instead of taking the help to keep you from having to do the same thing or deal with the same problem or even worse, you go ahead and drive with it not being seviced right. its not a cheap civic, its a bmw, .....


From my research,
http://www.amp.su/files/denso/A_C_Co..._2009_2010.pdf

THis is what I find. and posting if someone need it as reference.
A (new Compressor) - comes 4.22 fl Oz oil,
B (remaining in old Compressor) - 1.76 fl Oz oil,
Oil amount to remove from new Compressor - 2.46 fl Oz oil,

So used one comes with 1.76 and if I lost some, still amount of lose is very little. And also when I recharge a R-134A gas, it refill with oil as well.

And if it last one or 2 years, I'll be happy.
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Old 10-17-2011, 04:06 PM   #12
BMW-330CI
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Quote:
Originally Posted by mikeson View Post
From my research,
http://www.amp.su/files/denso/A_C_Co..._2009_2010.pdf

THis is what I find. and posting if someone need it as reference.
A (new Compressor) - comes 4.22 fl Oz oil,
B (remaining in old Compressor) - 1.76 fl Oz oil,
Oil amount to remove from new Compressor - 2.46 fl Oz oil,

So used one comes with 1.76 and if I lost some, still amount of lose is very little. And also when I recharge a R-134A gas, it refill with oil as well.

And if it last one or 2 years, I'll be happy.
why would let it go out after 1-2 years? just do it and that way it will last way longer than that. i didnt read the diy so if its alot of work i can understand the delay but if not take a day just to do it anyway.
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