Ideas on belt jumping

[fleebag]

Been battling the serpentine belt walking forward. Just converted to new tensioner and all pulleys seem to be lined up. Using 8 rib belt now since I keep having issue. This shows me revving it to around 4500. The belt walk fwd real quick.
All advice welcome


http://vid20.photobucket.com/albums/...psba7b1e22.mp4

[stevieturbo]

It's always one of two things. Alignment or tension.

A lack of both.

[fleebag]

Thanks and I think something with alignment. Belt is super tight and just installed new tensioner. For odd reason it jumps at the crank and all other pulleys it stays to the rear.

Maybe a stupid question but since my block is an LSX iron block is that any different than LS3 block as far as Harmonic Balancer? Would the offset be different for that shortblock setup?
If I run the 8 rib belt on the 10 rib crank once it jumps to the center I am fine. Then I can rev past 5k and belt doesn't move again at least not yet lol.

[stevieturbo]

If the belt isnt getting damaged and you arent experiencing slip, then I'd just run it and not worry too much about it. If the belt is happy running in that position, just let it do so.

[lbheat]

Which tensioner did you install? I put on jre super tensioner and i still get slip. Belt is tight so idk might be my tensioner, that thing moves way to much while driving at different speeds.

[SannerRacing]

Is that a innovative west balancer ? If it is I tried one and it shreades the ac belt after about 20 miles are so. Sent it back three times to have it checked out and still did it so I put the stock balancer back on and no problems.

[fleebag]

Yes it's an IWest 10OD. I did not get the heavy duty hub option so now I will remove and check it over.

[Warhorse]

Originally Posted by fleebag

Yes it's an IWest 10OD. I did not get the heavy duty hub option so now I will remove and check it over.

Did you ever find the problem with the belt moving to front of crank pulley?
I have a 10 rib set up and the last few months belt has started jumping ribs front ward and shredding ribs as it goes. It started this after being perfect for 13K miles with same setup. I have now been changing pulleys, idlers , power steering pumps, alternators, new HD Lingenfelter Tensioner, hardened bolts, etc. It has always had the Innovative West crank balancer 10%OD. Has anyone ever experienced this? Everything has been replaced EXCEPT crank balancer. All pulleys are in perfect alignment and nothing is visibly wrong with crank balancer.
Has anyone ever experienced crank walk to the extent that would cause this?
I just replaced the air conditioner (stretch to fit) belt last night and another new Green Stripe Micro V 10 rib belt and first pull 2nd -3rd with nitrous moved belt forward a rib again. Once it does this the belt is no longer any good. This time I noticed my NEW air conditioner belt was also walking forward. Hell, I've spent 1.5K on belts alone in 4 months. Would I have not experienced total engine failure before crank could have moved anywhere near enough to be the cause of problem?

[Unreal]

Laser alignment first, then replace or check tensioner.

I run a 10 rib IW west on my setup and it has never caused an issue. What has is the PS pulley out of alignment, the blower pulley out of alignment, the tensioner idler out of alignment. You need to get a gates laser system and align everything perfect.

[Warhorse]

Originally Posted by Unreal

Laser alignment first, then replace or check tensioner.

I run a 10 rib IW west on my setup and it has never caused an issue. What has is the PS pulley out of alignment, the blower pulley out of alignment, the tensioner idler out of alignment. You need to get a gates laser system and align everything perfect.

Alignment spot on all. Is there any chance the crank balancer is going bad. If so, could it even cause this problem? I'm to a point of burning car to ground.

[stevieturbo]

If it was going bad and causing misalignment then yes.

But that goes back to alignment.

Either that or tension problems.

[Unreal]

When you laser aligned it did you calibrate the tool at 8-9ft? The normal 2-3ft they suggest isn't far enough.

If you didn't do that, then you can't say alignment is spot on.

[SannerRacing]

On mine I only had issues with the AC belt tearing up. Alinment was perfect and still derailed so we put a belt on that was a half inch shorter and its been on ever since.

[Warhorse]

Originally Posted by stevieturbo

If it was going bad and causing misalignment then yes.

But that goes back to alignment.

Either that or tension problems.

Have replaced Lingenfelter HD tensioner with a new LPE one. (Same tensioner)
Crank Balancer appears to be turning without any front/rear wobble or movement.
All ribbed pulleys (Power Steering pump, alternator, blower drive and tensioner) were all aligned to the crank pulley. Once all ribbed pulleys were aligned, Water pump pulley, Idlers (Idler located on TVS slider adjustment, idler between crank and alternator and 100mm Idler between tensioner and crank were all installed and either shimmed or spacers milled to provide equal clearance at belt sides (belt rides in the middle between sides)

Has anyone ever had an IW 10% OD crank balancer go bad? Not trying to point fingers at any component manufacturer, just looking for answers. Every thing will wear over time. Seems to be the only component NOT changed or removed. Just cant seem to see any abnormal movement from it. Further, it is the only thing in common with the 10 rib belt setup and air conditioner belt where I noticed it also has moved forward in one 2nd-3rd gear pull after both belts were replaced new just minutes before test run.