Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Serpentine Belt Replacement
 
Bookmark and Share

Pelican Technical Article:

Serpentine Belt Replacement

Jared Fenton

Time:

2 hours2 hrs

Tab:

$130

Talent:

***

Tools:

T50 Torx driver, screwdrivers, 30mm wrench

Applicable Models:

Porsche 955 Cayenne (2004-10)
Porsche 955 Cayenne GTS (2008-10)
Porsche 955 Cayenne S (2003-10)
Porsche 955 Cayenne Turbo (2003-10)
Porsche 955 Cayenne Turbo S (2006-10)

Parts Required:

New serpentine belt

Hot Tip:

Wait until the engine is cold to replace belt

Complementary Modification:

Replace belt tensioner/pulleys

One of the routine maintenance items that you should perform on your Cayenne is the inspection and if needed, replacement of your serpentine belt. The serpentine belt is driven off of the crankshaft and drives accessories on the engine; the water pump, power steering pump, alternator, and air conditioning compressor. The serpentine belt setup utilizes a spring-loaded belt tensioner pulley that provides the proper tension for the belt at all times, making adjustment unnecessary. This belt should be checked periodically (every 5,000 miles, or when you change your oil).

When inspecting your belts, the one thing that you want to look for is cracks. If you see any cracks at all, you should replace your belt immediately. It's only a matter of time until the belt will snap and possibly leave you stranded.

Replacement of the belt requires removal of the front engine compartment covers, the lower under trays, the front intake duct and also the hoses to the air cleaners. Please see our articles on removing engine compartment covers, removing under trays and also intake manifold removal for more information.

To release tension on the belt, you'll need a 30mm wrench. Rotate the tensioner clockwise to release the tension. You can then peel the belt off the top of the water pump pulley and then off the other pulleys. Tip: If the belt is worn, simply release the tension on it, and snip it with some large tin cutters. You'll then be able to pull it out of the car easily.

Shown here is the telltale sign of a belt on it's last legs, cracks (green arrow).
Figure 1

Shown here is the telltale sign of a belt on it's last legs, cracks (green arrow). If your belt looks like this, you should replace it immediately.

The serpentine belt is held in place by the belt tensioner.
Figure 2

The serpentine belt is held in place by the belt tensioner. Shown here is the boss on the end of the tensioner (green arrow).

Use a 30mm open end wrench on the boss and rotate it clockwise to relieve tension on the belt.
Figure 3

Use a 30mm open end wrench on the boss and rotate it clockwise to relieve tension on the belt. It will take a bit of effort to overcome the pneumatic strut that tensions the belt.

Rotate the tensioner clockwise until it stops.
Figure 4

Rotate the tensioner clockwise until it stops. At this point, the belt will be loose enough for you to carefully pull the belt off the top of the water pump pulley (green arrow). Keep in mind that you may need a helper to hold the wrench back while you remove the belt. Use caution here, as the belt is under a lot of tension. The tensioner can slam back with force if the wrench slips off.

Once all the tension is removed from the old belt as shown here (green arrow), you can simply cut the belt and pull it up and out from the front of the engine.
Figure 5

Once all the tension is removed from the old belt as shown here (green arrow), you can simply cut the belt and pull it up and out from the front of the engine.

Here is the diagram sticker located on the front of the engine compartment.
Figure 6

Here is the diagram sticker located on the front of the engine compartment. This diagram shows you the orientation of the belt for when you install the new one. Based on the location of the belt and the proximity of the radiator fans, it is nearly impossible to get a goodPicture of the new belt fully installed. I would suggest routing the belt over the alternator pulley (green arrow) first, then work the belt over the various pulleys and tensioner until you can lay the belt just in front of the water pump pulley (yellow arrow) as shown inPicture 5. Then rotate the tensioner fully clockwise and slip the belt over the pulley. Of course, this is merely my method of fitting the belt. Your results may vary.

Bookmark and Share
Comments and Suggestions:
rubber boa Comments: I'm replacing the tensioner roller as per your pic of a worn one but can not find a torque amount. can you help me with that. Can't seem to find it in my Porsche manual. Thanks 04 Cayenne turbo
March 18, 2015
  Followup from the Pelican Staff: I don't have that information. If it isn't in the Porsche manual, I can;t think of any other source. - Nick at Pelican Parts  

  Search our site:    

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

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Wed 12/7/2016 02:33:30 AM