Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > 5 Series DIY

5 Series DIY
Knowledge Is Power! ~ The place for do-it-yourself threads on a variety of topics. Start a thread describing a particular job (oil change, cooling system overhaul, brakes, shocks and springs, etc.) or search for one you need help with!

Thread Tools Display Modes
Old 07-07-2010, 11:05 AM
Nasir Nasir is offline
Registered User
Location: NY
Join Date: Jul 2007
Posts: 91
Mein Auto: 2000 528i
Talking AC Makes loud Noise?

Hey guys! Longtime no talk because I had no problem with my 2000 528i.
Now as we have severs hot weather in the East, when I am using AC, it sounds very loud and abnormaly noisy. My son has the same car but it does not make this much noise when his AC operates.
Some one said I may need coolent/oil in the compressor? I have never heard about this. Is it true? Any idea guys?

Last edited by Nasir; 07-07-2010 at 11:11 AM.
Reply With Quote
Old 07-31-2010, 01:40 PM
Fleetman's Avatar
Fleetman Fleetman is offline
Officially Welcomed to the 'Fest
Location: Thomasville, Pa
Join Date: Jul 2010
Posts: 230
Mein Auto: '11 X5 35d & 98 Cherokee
There is probably a good chance it is low on refrigerant. The refrigerant carries the lubricating oil through the system so if there is a refrigerant leak there will also be a resultant oil loss.....both of which will cause a noisy compressor. I suggest not using the ac and have a tech look at it (soon) before the compressor completely fails. As a reminder, the ac compressor will also run anytime "Defrost" is selected. A failed compressor can get expensive to repair as usually you have to replace the compressor, drier, and, most times, the condenser as they are near-impossible to thoroughly clean. Unless you have a very good understanding of refrigeration and possess the proper equipment (gauges, vacuum pump, etc) this is not normally a job for the DIY'er.
Reply With Quote

See More Related BMW Stories

Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > 5 Series DIY
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -7. The time now is 08:51 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
© 2001-2015 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms