head unit shim problem - 2003-04 Mach 1 Registry Owners Club

un gm · 11-07-2009, 10:32 AM

installed a p1sc. my belt keeps jumping one rib towards the motor. took it back to the shop and they said they re-shimmed it. after about 100 miles it has jumped one rib again. i could take the head unit off myself. was wondering if anyone has had this problem or has any advice.

blown03Mach1 · 11-07-2009, 04:58 PM

After more than 23K miles of uses, I have never puked a belt. I did have to place a washer between the bottom head unit bracket and the pulley. Essentially this placed the head unit further towards the rear and the s/c pulley is so close to the valve cover that I dont think I can pass a piece of paper between the pulley and the valve cover.

un gm · 11-07-2009, 07:07 PM

exactly what im seeing. did you install yourself? did the kit come with shims and you still had to add the washer?

blown03Mach1 · 11-07-2009, 09:07 PM

Quote:

Originally Posted by un gm

exactly what im seeing. did you install yourself? did the kit come with shims and you still had to add the washer?

I installed it myself and I thought that the head unit pulley was too far forward so I added the washer to the bottom mount bolt thus kicking the top (the s/c pulley) aft towards the alternator pulley.

Beefy Nugz · 11-08-2009, 11:59 AM

I installed my kit exactly the way the directions said. Then I had to use my own judgment and REMOVE a washer. Double checked directions and it's supposed to be there, but it kept throwing my belt off 2 ribs. After I removed the washer everything lined up better and I've never had a problem since.

1bad4vgt · 11-08-2009, 08:15 PM

If you are using the single shoulder pulley get rid of it.

un gm · 11-09-2009, 04:46 PM

Quote:

Originally Posted by Beefy Nugz

I installed my kit exactly the way the directions said. Then I had to use my own judgment and REMOVE a washer. Double checked directions and it's supposed to be there, but it kept throwing my belt off 2 ribs. After I removed the washer everything lined up better and I've never had a problem since.

so you removed the washer on the bottom bracket?

un gm · 11-09-2009, 04:47 PM

Quote:

Originally Posted by blown03Mach1

I installed it myself and I thought that the head unit pulley was too far forward so I added the washer to the bottom mount bolt thus kicking the top (the s/c pulley) aft towards the alternator pulley.

looks like i have a washer there. you added another?

11-07-2009, 10:32 AM	#1
un gm occasional user Join Date: Oct 2009 Location: Hood cnty TX Posts: 927	head unit shim problem installed a p1sc. my belt keeps jumping one rib towards the motor. took it back to the shop and they said they re-shimmed it. after about 100 miles it has jumped one rib again. i could take the head unit off myself. was wondering if anyone has had this problem or has any advice.

11-07-2009, 04:58 PM	#2
blown03Mach1 8LB YNER Join Date: Mar 2005 Location: Tampa Posts: 5,661	Re: head unit shim problem After more than 23K miles of uses, I have never puked a belt. I did have to place a washer between the bottom head unit bracket and the pulley. Essentially this placed the head unit further towards the rear and the s/c pulley is so close to the valve cover that I dont think I can pass a piece of paper between the pulley and the valve cover. __________________ Just because you're winnin' Don't mean you're the lucky ones TR 2003 (Jezebel) sold Mar 12...

11-07-2009, 07:07 PM	#3
un gm occasional user Join Date: Oct 2009 Location: Hood cnty TX Posts: 927	Re: head unit shim problem exactly what im seeing. did you install yourself? did the kit come with shims and you still had to add the washer?

11-08-2009, 11:59 AM	#5
Beefy Nugz Registered User Join Date: Jan 2007 Location: St. Louis, MO Posts: 531	Re: head unit shim problem I installed my kit exactly the way the directions said. Then I had to use my own judgment and REMOVE a washer. Double checked directions and it's supposed to be there, but it kept throwing my belt off 2 ribs. After I removed the washer everything lined up better and I've never had a problem since. __________________ SOME KENNY BROWN CHASSIS AND SUSP. COMPONENTS 4:10'S MAC LONG TUBES WITH O/R-X AND MAGNA FLOWS. ORANGE BLAST P/P INTAKE W/ SPACER PSR K-MEMBER WITH A-ARMS AND COILOVERS P1SC 9LBS. 422HP - 390TQ 11'S AND COUNTING

11-08-2009, 08:15 PM	#6
1bad4vgt Registered User Join Date: Oct 2006 Location: Huntingtown, MD Posts: 92	Re: head unit shim problem If you are using the single shoulder pulley get rid of it. __________________ 02 GT Built stroker 4V W/F1A procharger T56 6 speed 10.61 @ 131

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)