Sound from engine bay when AC is ON

Reply Subscribe

Thread Tools

Search this Thread

04-24-2017, 05:41 PM

#11

lcc014

Contributors

Thread Starter

Join Date: Aug 2004

Location: Quincy, MA, USA

Posts: 1,103

Likes: 0

Received 0 Likes on 0 Posts

My Ride: E60 530i

Model Year: 2004

Engine: M54

After replacing both AC and Accessories belts on last Saturday. "AC On" noise is still there. I did try to listen to any noise in front of car with hood open, I could not hear any special noise similar to the one heard inside when driving (accelerating/decelerating). No squeaking sound when AC is ON.

Could it be AC tensioner pulley making noise when AC is ON during acceleration/deceleration ?

Thanks.

Reply Like

04-24-2017, 08:52 PM

#12

E60Japanese

New Members

Join Date: Jan 2015

Location: Japan

Posts: 356

Likes: 0

Received 1 Like on 1 Post

My Ride: E60 2006 sedan auto

Did you check the condition of all the belt wheel bearings while you had the belts off?

Reply Like

04-25-2017, 04:28 AM

#13

lcc014

Contributors

Thread Starter

Join Date: Aug 2004

Location: Quincy, MA, USA

Posts: 1,103

Likes: 0

Received 0 Likes on 0 Posts

My Ride: E60 530i

Model Year: 2004

Engine: M54

Quote:

Originally Posted by E60Japanese

Did you check the condition of all the belt wheel bearings while you had the belts off?

NO, I did not do that. I will do that soon to check, at a minimum, checking AC pulley bearing with AC belt off.

Thanks.

Reply Like

08-10-2017, 06:18 AM

#14

lcc014

Contributors

Thread Starter

Join Date: Aug 2004

Location: Quincy, MA, USA

Posts: 1,103

Likes: 0

Received 0 Likes on 0 Posts

My Ride: E60 530i

Model Year: 2004

Engine: M54

Noise/Sound is fixed

I replaced all 2 tensioners (AC & Serp.) along with idler pulley. No more noise/sound from engine bay when AC is ON. It is now back to "new" car sound