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Re: how to put on a/c compressor
I would refer you to a Haynes or Chilton auto repair manual to find your a/c compressor. It is normally on top of your motor to the left side and has normally a couple of 1 and half inch to 2 inch hoses with pressed hydraulic lines feeding into it. If you are looking for a replacement www.discountparts.com has cheap replacement parts for your BMW. I hope this information helps you!
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if the charge is low the compressor will not run add Freon to low port side with engine running and A/C on. If it is a low charge problem the compressor will turn on and cycle until the low pressure is corrected.
Did you use the proper gauges to measure the high side and low side pressures as you added the 134 (I assume not Freon)? If not, it's possible you put too much 134 on the high side and either you kicked a breaker for the pressure or you just burned up the compressor.
on the evaporator (silver canister looking thing) is a 2 wire plug (pressure switch) pull these and put a jumper wire between them and the compressor will start, if it doesnt there is another problem, be careful not to run compressor very long like this without adequate freon/oil as it can destroy the compressor
On the early 745i's BMW thought it would be a great idea not to have a tensioner for the a/c compressor. You have to first remove the alternator belt, which has a tensioner and requires a T55 torx to release the tension. If you are lucky enough to have a tensioner for the a/c belt, the torx will release this tensioner as well. If there is no tensioner, you can use a shop rag to "walk" the belt off the compressor pulley while turning the crank bolt using a ratchet.. It's sort of like the same processes as replacing a bicycle chain. When you go to put on the new belt, it will seem really short, and may require another set of hands to turn the crank bolt with a ratchet. You will also notice the belt making a stretching noise.
It has to be referring to the compressor for the air conditioner, but that is a very unusual name for it.
On a '97 318, there will often be a loud chatter when the compressor kicks on that is sometimes misdiagnosed as a failing compressor. In reality, most times it is the tensioner pulley on the belt.
pls. check your ac compressor magnetic clutch attached in front of ur compressor if its working/ ac clutch engage when u turn the ac switch on and disengage when u turn the ac switch off/ it normally makes a clacking sound when it engage with the rotation of ur compressor/ if its not engaging it means ur magnetic clutch is stuck up giving excessive load to ur engine thats why it overheats/ it smell burnt because its magnetic coil is fried/ or check cooling system of ur car might be that coolant is empty/ fan is not working/ radiator is clogged or thermostatic valve is stuck blocking coolant flow....