when i start my car the AC compressor shakes rapidly and is very loud as well as the bracket for it! can anyone tell me what the problem is!im young and sont know much about it!thanx for any help!

 

try tightening all the bolts that hold down the bracket. it could be that a nut or bolt is loose. and while your at it, check the rest of the bolts on your accessories like your alternator, power steering pump and water pump.

 

i tried tightening everything and everything seems to be down tight. im confused it just started up yesterday and i didnt want to drive it much and it just went crazy this morning!

 

then it could be the bearings. take it to a shop and ask them if thers excess play in the bearing, i cant tell you from here, its a feel type thing. if you wanna try yourself, remove the belt, and shake the pulley around and see if its makin noises and moving alot, and compare it to your waterpump or your alternator to see what it should feel like.

EDIT: are your exhaust bolts tight? mayb its an exhaust leak your hearing...or mayb its another accessory, how sure are you that its the compressor?

 

im pretty sure its the ac compressor its shakin an excessive amount i've never seenit do this before theres nothing else visible that i can tell is making other noise!

 

alright well then if no bolts are loose, and its nothing else, then its your bearings. take the compressor belt off and shake the pulley around a bit. if its excessively moving, then replace the pump.

 

These cars always do that. Mine has done it since new, to some extent; as have lots of others with the same complaint.

Its caused by the natural pulsating sort of action as each cylinder in the compressor (there are 4) compresses. The belt goes alternately slack and tight, and the whole thing resonates as a result. It usually quits when the RPMs get up past 1100 or so.

The fundamental problem is that the brackets are weak. Leaving parts off, or incorrect assembly, makes it DRAMATICALLY worse. Typical parts that get left off include the brace that goes from the top of the BIG bracket back to the intake next to the carb (aftermarket intakes ), and the one that bolts to the 2 front exh man bolts (improperly installed headers ).

There was an add-on bracket that became available in about 85, that went from the rear of the big bracket, back to one of the center exh man bolts.

Best place to start is by making sure that EVERY bracket and EVERY bolt is present.

 

Supplement

 

ok there was a bolt loosing and i got that tightened up! but when i started my engine there is a piece on the ac bracket that looks lke there is a coil incased in it or maybe a heavy duty spring?can anyone tell me what this part is cause this is whats loose and shaking!it is actually also attched tot he smaller pulley next to the ac compressor!what is this?

 

that is the tensioner pulley used to keep the serpintine belt tight if your have that set up... which has a big spring and a pulley on a lever to pull slack out of the belt and a little movement on that is normal

 

ok thank you i have to replace that and possibly the ac compressor!