OK guys here I go again. Ever since I put on the 3.125 pully I have noticed the belt moving back and forth on the tensoiner pully (about 3mm or so) The belt jumped the trk last saturday and shredded. I have the SC off again (4th time in the past year) and have noticed that there are different width shimms between the charger and the mounting bracket (2 are about 3mm, 1 is about 2mm and 1 is 1 mm). I was wondering, those who have the 3.125, have you had alignment problems? are you using any shims? if so what mm width are they? Should the shims be all the same width? Any help would be most appreicated.

 

i have no shims at all. also, your tensioner should not be wiggling. check the torque on that bolt or the bearing.

 

Each car is differnt and each alignment issue is different...you have to find out what works well with your car....somebody had to have added those shims to even everything out, but didnt end up being right since your shedding belts still...find out whats alligned wrong and add shims according to that

I would try NO shims and see how that looks...get underneath, on top and look at it...take it for a nice easy ride close to home...maybe just idle it for alittle bit

when I added a New dler pulley to my setup it ended up not lineing up correctly to the alternator and was all angled wrong...I siwtched back to the old pully and it wound up being fine

You have to find out what evens everything up and go with it...
It gonna take some trial and error but your gonna have to do it, if keeping the blower is worth it to you

 

iansw hugs his V1 bracket.

<again>

 

Hey Ian, feeling better? Too bad I didn't see you at the GG meet.

Basevoid, I've got the 3.125" on and I've had my shims on since I started out with the 3.60" back in Oct, 2000. The belt should not even move at all on the tensioner pulley. Somethings flexing probably?

Another thing crossed my mind: Has the 3.125" pulley shifted positions? If its not snug on the spindle it too can move back and forth. That happened to me with my 3.33" pulley when it shifted all the way over to the mounting plate.

 

OK, got it all back together with no shims, looks good at the tensioner pully, but there is about 1/4inch difference at the idler pully (compared to the tensioner,which is riding about 4 mm from the outside edge). The belt rides about 2mm away from inside edge of idler. My guess is to pull it all apart again and put 3 or 4 spacers at the front side of the charger to pull the belt more to the middle of the idler. Any chance that the pully on the alternater could somehow be misaligned?

 

Hang on, basevoid...I made that mistake a long time ago by loading all of the shims to one side. You have to keep the 3.125" pulley in a parallel plane to the other pulleys. Spread the shims evenly around all of the major posts. I have one shim on posts #4, 8 and 12 I believe.

 

i may be wrong but it doesnt sound like alignment issues. if the belt is wiggling back and forth its loose. what kind of pulleys do you have. i had some serious aligment issues but solved it by changing the tensioner pulley to a wider metal lexus pulley without rails, trouble free ever since.

 

Here's some pics I took when I still had the 3.33".
Notice the shift of the 3.33"? The right hand pic is what the pulley position should be at.



Here's how bad it had shifted over. It was rubbing against the #5 bolt

 

by any chance do you have the correct belt size on for that pulley.

 

3.25" to 3.125" = Gates belt K060705

 

I have the correct size belt, the charger pully has no play in it. It is running where it should be on the tensioner pully, but it is very close to the inside edge of the idler pully.

 

Does the belt stay that way consistantly or does it still move around?

 

if thats the case maybe you have too many washers on the idler to make it stick out so far. which idler pulley do you have. i changed to a huge lexus pulley and it gives me plenty of space for the belt. try taking off a washer or two on the idler pulley to see if it brings it back in.

 

Well, i'm not using any washers on the inside of the idler pully. So, I pulled off the sc again and put some washers on. I put some thicker ones on holes 11,12,13 and graudually dropped down to a very skinny washer on hole 4. The belt is now running steady, close to the outside edge of the tensioner and right in the middle of the idler. The alignment seems to be holding under boosted runs and looks good. I know it makes sense to use all the same washer thickness but this way has seemed to work.

 

you got to do what works. there is no science to this and if different size washers worked then thats the answer. i hope your issues are fixed becasue this can be a pain in the butt. once you solve this it should run right from now on.