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skiingj 09-10-2010 06:18 PM

WK Serpentine belt & Puley HELP!!
Need some help.
My í05 WK 5.7 Hemi serpentine belt broke today. I installed a new one but it keeps coming off the water pump. Checked everything is seated correctly. The only thing I can find is one of the pulleys has a grove in it. I have pics but it looks like I can't attach them yet... Iím not too mechanical so I appreciate anyoneís help!

robpp 09-10-2010 06:34 PM

Re: WK Serpentine belt & Puley HELP!!
1 Attachment(s)
from 2007 manual....should be same:


NOTE: When installing accessory drive belt onto pulleys, make sure that belt is properly routed and all V-grooves make proper contact with pulleys.

1. Position the drive belt over all pulleys except for the water pump pulley .
2. Rotate tensioner clockwise and slip the belt over the water pump pulley.
3. Gently release tensioner.

skiingj 09-10-2010 06:54 PM

Re: WK Serpentine belt & Puley HELP!!
3 Attachment(s)
Thanks for the reply. Item #6 in your pic looks like it should be totally smooth but mine has a grove worn into it which I think may be he cause of the belt being pushed back two notches on the water pump (item #7).

Each time I re-seat the belt I restart the Jeep and the belt slips back a couple notches on the water pump.

I can now attach pics which I think I just did. Fingers crossed!

maxst2 09-10-2010 07:03 PM

Re: WK Serpentine belt & Puley HELP!!
Looks like you need a new tension pulley. That's really worn.

robpp 09-10-2010 07:09 PM

Re: WK Serpentine belt & Puley HELP!!

Originally Posted by maxst2 (Post 266409)
Looks like you need a new tension pulley. That's really worn.

x2 on that. that groove is NG.

head to NAPA. no need to overpay at the stealer.

skiingj 09-10-2010 07:16 PM

Re: WK Serpentine belt & Puley HELP!!
Thanks for the help! What kind of tool removes it? Looks like a tool that is star in shape.

maxst2 09-10-2010 07:40 PM

Re: WK Serpentine belt & Puley HELP!!
Looks like Torx to me.

skiingj 09-10-2010 09:03 PM

Re: WK Serpentine belt & Puley HELP!!
Just replaced the pulley and it still jumps two groves towards the engine. Not a clue. Made appointment with the stealership tomorrow afternoon. Any ideas before I take it in? Thanks again for the responses!!!

robpp 09-10-2010 09:15 PM

Re: WK Serpentine belt & Puley HELP!!
are ALL the pulleys spinning freely????

skiingj 09-10-2010 09:40 PM

Re: WK Serpentine belt & Puley HELP!!
Yes they all look fine. Just after starting it jumps two groves. It appears to run fine but I'm not sure how long that will last since it is off a couple groves. I may try and replace the tension pulley if I can figure out how it comes off and if I can find one tonight.

The water pump was replaced in March. Everything lines up and looks straight until you start the Jeep then the belt jumps and looks crooked. I've double checked the belt path and everything looks fine....


Redrubicon2004 09-10-2010 11:04 PM

Re: WK Serpentine belt & Puley HELP!!
Can you try with a straight edge to see if all the pulleys are lined up? Sounds like you have a pulley riding on a bent shaft or something that isnt in line with the others.

You should be able to find the problem before taking it to a dealer. If you really put your mind to it, you should be able to solve this issue. Try pulling the fuel pump fuse and crank the engine over a few times. You might be able to see what is going on. (might have to run the engine for a couple seconds to run the fuel out)

On stuff I cant figure out, I ask a buddy to stop by and look at things....Some times you need another set of eyes to see the obvious.

skiingj 09-11-2010 12:54 AM

Re: WK Serpentine belt & Puley HELP!!
Redrubicon2004 - Thanks! I just can't figure it out. Everything appears to line up. The auto parts store did not have the tension pulley and they thought they could only order the whole Serpentine Tension arm with pulley. Which is covered under my extended warranty... But since that arm is so far downstream from where it is coming off the water pump and the tension appears tight I'm not sure that is the problem. I'm not very automobile mechanical and have exhausted my patience/ability. Need to wait a year or two before I give in and get the next Jeep a WK2. Iím in the Sacramento, CA area if anyone is nearby. I make a mean Mai Tai!

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