Parts CatalogAccessories CatalogTech InfoTech Forums
 
Follow Pelican Parts on FacebookFollow Pelican Parts on TwitterFollow Pelican Parts on InstagramFollow Pelican Parts on YouTubeFollow Pelican Parts on PinterestFollow Pelican Parts on Tumblr
  Search our site:   
View Recent Cars  |  Cart | Project List | Order Status | Help    
 

Get FREE Ground Shipping with the purchase of $75 in qualifying parts!
 

Bookmark and Share

 


Pelican Technical Article:
Replacing Your Drive Belt on your BMW

Nick Czerula

 
Time: 2 hours
Tab: $150
Talent: 
Tools:
Set of sockets, wrenches, screwdrivers
Applicable Models:
325i (2006)
325Xi (2006)
330i (2006)
330xi (2006)
328i (2007-2009)
335i (2007-2009)
Parts Required:
Drive belt
Hot Tip:
Work with a cool engine.
Performance Gain:
Proper engine accessory operation
Complementary Modification:
Inspect and replace pulleys
 
  

  

Check out some other projects in this series: 

Need to buy parts for this project?
Click here to order parts for your BMW from our parts catalog
  
    
BMW E90 models utilize 1 multi-rib engine drive belt.
Figure 1
BMW E90 models utilize 1 multi-rib engine drive belt. The belt may be referred to as a serpentine belt because it snakes around the engine accessories. With your engine cold and turned OFF, inspect your drive belts for wear. The belts should be free from cracks, fraying, glazing and missing chunks. Replace your belt if any of the previously mentioned issues are present or every 4 years. In this article, I’ll go over the steps involved with replacing the drive belts on the BMW E90 models. Be sure to work with a cool engine and remove the key from the ignition.
Large Image | Extra-Large Image
Working at front of radiator support, remove two T20 Torx fasteners from the intake duct.
Figure 2
Working at front of radiator support, remove two T20 Torx fasteners from the intake duct. (green arrows)
Large Image | Extra-Large Image
Working at intake air duct connection on air filter housing, using a small flatblade screwdriver, release retaining tabs on each side and pull duct off.
Figure 3
Working at intake air duct connection on air filter housing, using a small flatblade screwdriver, release retaining tabs on each side and pull duct off. Normally-aspirated engine shown. For turbocharged engines, the duct on the radiator support unscrews the same as the previous step, the duct for the air filter housing is also removed the same way, the air filter housing is in the different spot. Follow duct and release tabs to remove duct.
Large Image | Extra-Large Image
Then, pull intake duct out of radiator support and remove from vehicle.
Figure 4
Then, pull intake duct out of radiator support and remove from vehicle. (green arrow)
Large Image | Extra-Large Image
Next, using a T60 Torx socket on a long handled ratchet, rotate belt tensioner clockwise to release belt tension.
Figure 5
Models equipped with turbo-charged engines: Remove duct that runs across top of radiator to access drive belt. To do this, loosen hose clamp at bottom air filter housing (green arrow). Then rotate hose lock 90° counterclockwise and pull hose off duct. (yellow arrow) Pull duct off air filter housing.
Large Image | Extra-Large Image
This photo shows part of tensioner you insert your Torx bit into the release tension.
Figure 6
Models equipped with turbo-charged engines: Then remove 6mm Allen duct fastener (green arrow) and pull duct (yellow arrow) away from engine enough to remove drive belt. Raise and support front of vehicle. See our tech article on jacking vehicle. Before removing drive belts, mark direction of rotation (if reusing belts) and note installation position.
Large Image | Extra-Large Image
With tension released, pull belt off tensioner pulley, then remove belt from remaining pulleys and remove from engine.
Figure 7
Next, using a T60 Torx socket on a long handled ratchet, rotate belt tensioner clockwise to release belt tension.
Large Image | Extra-Large Image

Figure 8
This photo shows part of tensioner you insert your Torx bit into the release tension. (green arrow)
Large Image | Extra-Large Image

Figure 9
With tension released, pull belt off tensioner pulley, then remove belt from remaining pulleys and remove from engine. With belts removed, inspect pulleys for lateral play or binding. The idler pulley commonly fails, if this occurs the coolant pump will loose the drive belt and engine will overheat. Now is a good time to replace the idler pulley to prevent future problems. See our tech article on idler pulley replacing. To install accessory drive belt, begin by wrapping belt around crankshaft pulley, then over and around power A/C compressor pulley, around power steering pulley, around idler pulley and around alternator. Once the belt is properly installed on all accessories, release tensioner as described earlier and slide belt onto tensioner pulley. Check that it is properly aligned and installed in all pulley grooves correctly. Be careful not to force belt onto pulleys, damage may occur. Release tensioner and check that belt is properly aligned and installed in all pulley grooves correctly. Be careful not to force belt onto pulleys, damage may occur. Start engine and allow to run for less than 30 seconds, shut engine OFF and recheck belt installation.
Large Image | Extra-Large Image
Need to buy parts for this project?
Click here to order parts for your BMW from our parts catalog
Bookmark and Share
Comments and Suggestions:
FrankComments: What are the torque specs on the tensioner and the pulleys for the N54 w/turbo?
April 9, 2014
 Followup from the Pelican Staff: The torque specs will be listed in this repair manual:

http://www.pelicanparts.com/catalog/SuperCat/4412/BMW_4412_TOLBKS_pg1.htm #item0 - Nick at Pelican Parts
 
louComments: I'm just now finding your guides. They are awesome. I'll make sure to spread the word!
July 31, 2013
 Followup from the Pelican Staff:
Thanks for the feedback. Glad we could help. - Nick at Pelican Parts
 
kumarComments: my t60 screw hole is stripped how can i remove it and put belt on?
May 23, 2013
 Followup from the Pelican Staff: You can use a wrench on the fasteners for the tensioner pulley to relieve tension. Once you get the belt off, I suggest replacing the belt tensioner.

Give our parts specialists a call at 1-888-280-7799 and they can help you find the right part.
- Nick at Pelican Parts
 

Check out some other sample projects from the book: 

 

Got more questions?  Join us in our BMW Technical Forums

Or, see what other questions readers have asked about this article...
 Applies to: 325i (2006), 325Xi (2006), 330i (2006), 330xi (2006), 328i (2007-2009), 335i (2007-2009)
  Search our site:   

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location]

Copyright © Pelican Parts Inc.