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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E60 / E61 (2004 - 2010)

E60 / E61 (2004 - 2010)
BMW 5-Series E60 Sedan was first seen in the Unites States in the fall of 2003 with a 2004 Model Year designation. The E61 wagon followed shortly there after. The E60/E61 5 series is now available as a 528i, 528xi, 535i, 535xi, 550i and a 535xi sports wagon! -- View the E60 Wiki

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  #1  
Old 07-16-2016, 12:45 PM
njlou njlou is online now
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Location: New Jersey
 
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Mein Auto: corvette/528xi
Belt tensioner / pulley replacement

2008 E60 / n52 / 528xi - 62k miles

I discovered that my serpentine belt is becoming misaligned. this seems to be a common problem. It seems that the tensioner wears and causes the issue.
I have done some research on the topic including this forum and found so many differing results.
I intend to replace the idler/tensioner/belt.

For some reason the idler is not often mentioned as a replacement, and torque specs are difficult to find, so here's what I have:

I need -
t60 torx to de-tension the belt
e14 socket to remove the tensioner bolt
a new AL bolt
Tensioner torque= 25nm / 18.5 ft lb + 90degrees
idler bolt torque= 40 nm = 29ft lb

I got the entire kit from AMZN

Do I have the correct parameters??
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  #2  
Old 07-16-2016, 05:32 PM
twh twh is offline
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Location: Fairfax, VA
 
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Posts: 555
Mein Auto: 2006 530xi 6 speed
Quote:
Originally Posted by njlou View Post
a new AL bolt
Tensioner torque= 25nm / 18.5 ft lb + 90degrees
idler bolt torque= 40 nm = 29ft lb
The quoted is correct (for N52, at least).

As I recall, it took me a long time to find at least one of the torque specs and I wrote them down in my Bentley manual.

Don't remember the socket sizes.
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  #3  
Old 07-16-2016, 06:25 PM
njlou njlou is online now
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Location: New Jersey
 
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Mein Auto: corvette/528xi

Thanks for the verification.
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  #4  
Old 07-24-2016, 07:20 PM
BostonJon BostonJon is online now
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Location: Boston, MA
 
Join Date: Jul 2016
Posts: 22
Mein Auto: 2007 E61
Quote:
Originally Posted by njlou View Post
2008 E60 / n52 / 528xi - 62k miles

I discovered that my serpentine belt is becoming misaligned. this seems to be a common problem. It seems that the tensioner wears and causes the issue.
I have done some research on the topic including this forum and found so many differing results.
I intend to replace the idler/tensioner/belt.

For some reason the idler is not often mentioned as a replacement, and torque specs are difficult to find, so here's what I have:

I need -
t60 torx to de-tension the belt
e14 socket to remove the tensioner bolt
a new AL bolt
Tensioner torque= 25nm / 18.5 ft lb + 90degrees
idler bolt torque= 40 nm = 29ft lb

I got the entire kit from AMZN

Do I have the correct parameters??
i will be doing the same thing soon. can you post the link to the kit on amazon?
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  #5  
Old 07-24-2016, 07:40 PM
njlou njlou is online now
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Location: New Jersey
 
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Posts: 934
Mein Auto: corvette/528xi
This is the kit I got from AMZN:
ContiTech ADK0022P Accessory Drive Belt Kit
Price: $87.92 Shipping free with "prime" +tax.

Make sure you get the one for your model.

A good site:

Last edited by njlou; 07-24-2016 at 07:52 PM.
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  #6  
Old 07-25-2016, 09:06 AM
mboat mboat is offline
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Join Date: Dec 2014
Posts: 24
Mein Auto:
FCPEuro is a good site, as well as PelicanParts to find this stuff. Good info on the torque specs, I just did my belt, tensioner and idler pulley on my N52 530i.
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2007 E60- 530i 6MT - Monaco Blau - Beige Dakota leather - Premium, Sport, Cold Weather packages - 2013 CIC Retrofit, 2011 Software, Weisslecht Angel Eye LED's, 18" TSW Bathurst Rotary Forged wheels, 35% Ceramic Tint, and Sport Mode.
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  #7  
Old 07-26-2016, 08:00 PM
njlou njlou is online now
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Mein Auto: corvette/528xi
Update:
I did the replacement today: -Tensioner, pulley, and belt-
A word of advice - remove the fan assembly - it is the only way to go.
The fan is easy to remove but tricky.
I did the job with my brother's assistance in ~2hrs.
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  #8  
Old 07-26-2016, 08:34 PM
BostonJon BostonJon is online now
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Location: Boston, MA
 
Join Date: Jul 2016
Posts: 22
Mein Auto: 2007 E61
Quote:
Originally Posted by njlou View Post
Update:
I did the replacement today: -Tensioner, pulley, and belt-
A word of advice - remove the fan assembly - it is the only way to go.
The fan is easy to remove but tricky.
I did the job with my brother's assistance in ~2hrs.
any advice/pointers on removing the fan assembly?

I just ordered the contitech kit and will tackle this over the weekend if it isnt so bloody hot
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  #9  
Old 07-27-2016, 05:13 AM
twh twh is offline
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Location: Fairfax, VA
 
Join Date: Nov 2015
Posts: 555
Mein Auto: 2006 530xi 6 speed
I left the fan in when I changed mine. Took the fan out in wife's X5 when I did that one.

Figuring out how to get the fan out is all the work

As I recall...

Unhook the big-ass electrical connector.
Move a small hose out of the way - you'll also need a new small hose clamp unless someone has already been there.
Left side (driver's side) there is a thing that flips out about half way down. It sits flush with fan assembly when installed and flips back, pointing toward firewall, when released.
Right side (passenger side), there is a springy thing about half way down. You have to hold it down with a larger size flat blade screwdriver and then pull the assembly up and out.
When you out it back in, make sure the stakes fit in their holes.
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