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Serpentine belt image/routing
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C6Marcy   
Thu Jul 30 2020, 07:09am
Joined: Jul 11 2020
Member No: #4417
Location: South West
 I have a slightly worn bearing/whining noise coming from my 2008 2.7 serpentine area, the noise increases and decreases with engine revs

Are there any diagrams so I can visualize the area before I start taking the car apart to diagnose

I'm assuming it's the alternator pulley but guessing can get expensive
C6Marcy   
Thu Jul 30 2020, 05:50pm
Joined: Jul 11 2020
Member No: #4417
Location: South West
 Found this in the docs section

The timing belt doc has a great pic of the serpentine arrangement
FraserG   
Thu Jul 30 2020, 11:04pm

Joined: Jan 05 2015
Member No: #2011
Location: Auckland
 Don't ignore the noise. I did and wished I hadn't. The belt failed at speed half way around a fast curve and all of a sudden I had no power steering! It was at that point that I realised how light the steering normally is and how weak my arms are!

Luckily no damage done although it wrecked my holiday weekend and the car went home on the back of a truck.
C6Marcy   
Thu Jul 30 2020, 11:52pm
Joined: Jul 11 2020
Member No: #4417
Location: South West
 Sorry to hear that, do you know which part failed to make the belt come off?
Tjensen   
Sat Aug 01 2020, 01:24pm

Joined: Jul 17 2012
Member No: #954
Location: Bergen
 My belt failed twice: 1. the generator clutch 2. The tensioner. The last one was an error at the garage repairing no 1, failed to check torque for the fastener.
FraserG   
Mon Aug 03 2020, 09:17pm

Joined: Jan 05 2015
Member No: #2011
Location: Auckland
C6Marcy wrote ...

Sorry to hear that, do you know which part failed to make the belt come off?


The belt was squeaking for a while which I was putting off doing anything about until the next service in a few months. The belt broke. Just like fan belts used to when I was a kid.
C6Marcy   
Wed Aug 05 2020, 11:49am
Joined: Jul 11 2020
Member No: #4417
Location: South West
C6Marcy wrote ...

I have a slightly worn bearing/whining noise coming from my 2008 2.7 serpentine area, the noise increases and decreases with engine revs

Are there any diagrams so I can visualize the area before I start taking the car apart to diagnose

I'm assuming it's the alternator pulley but guessing can get expensive


Ended up being the Poly belt deflection pulley/idler

Managed to split the two halves of the pulley and replace the 6303 bearing, cheap fix and tested the OAP in the process

Result
 

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