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Serpentine Belt Keeps Being Tossed

diambo4life

Well-known member
Joined
Jul 7, 2013
Messages
315
Location
Edmond, Oklahoma
I am at my wits end about this. Everything looks ok but as soon as I make a 2nd gear pull, out goes the belt. The harmonic damper is not separated and both water pump and alternator pulleys are facing the right direction. Used two different belts with the same outcome. Loosening or tightening the belt has not made a difference. What else should I look for that I am overlooking? /ubbthreads/images/graemlins/banghead.gif /ubbthreads/images/graemlins/banghead.gif /ubbthreads/images/graemlins/banghead.gif /ubbthreads/images/graemlins/banghead.gif
 

strokin4dr

Well-known member
Joined
Aug 30, 2005
Messages
2,770
Location
Savannah, GA
Mitsubishi alternator in stock location?
 

transparentdsm

Well-known member
Joined
Jul 27, 2011
Messages
3,690
Location
Cherry Hill, NJ
^ this. I have a Jay racing relocation kit on my car and the kid I got it off had the shims backwards and the belt would walkvevery time I went about 3k rpm.
 

diambo4life

Well-known member
Joined
Jul 7, 2013
Messages
315
Location
Edmond, Oklahoma
The pulleys are oriented correctly with the dish side facing the engine. Stock AZ alternator. Stock location. /ubbthreads/images/graemlins/mad.gif /ubbthreads/images/graemlins/dunno.gif Visually, there was no misalignment. I currently have it taken apart to fix a leaking crank seal.
 
Last edited:

GSTwithPSI

Well-known member
Joined
Jan 1, 2012
Messages
3,460
Location
SoCal
It's gotta be an alignment issue, or damaged pulley.

You should be able to get a dial indicator on the crank and alternator pulleys to check for wobble. You can usually eyeball the water pump pulley and see if it's out of round.

I suppose the water pump could also be a potential cause. Check to see if its bearing is tight.

I'd probably remove the PS and water pump pulley sandwich and make sure the stack is good to go. If one of the pulleys isn't seating correctly, or is bent, you'll have an issue. If there's corrosion of the face of the water pump mounting flange, that could cause problems with the pulley stack not seating flush.
 

thomcasey

Well-known member
Joined
Sep 24, 2014
Messages
907
Location
Indianapolis, IN
Also, the rebuilt alternators sometimes have a different pulley than stock
 

diambo4life

Well-known member
Joined
Jul 7, 2013
Messages
315
Location
Edmond, Oklahoma
The crank is wobbling. Engine is coming out. What is weird, the car is running perfectly. I figured it out after the crank seal kept springing a leak. It was very obvious then. Oh well....Thanks for the help.
 
Last edited:

diambo4life

Well-known member
Joined
Jul 7, 2013
Messages
315
Location
Edmond, Oklahoma
You can say that. /ubbthreads/images/graemlins/uhh.gif I have a spare crank. Just hoping my pistons/rods are ok. /ubbthreads/images/graemlins/dunno.gif Like I said, the car runs perfectly and if it was not throwing the belt, I would have never guessed this was happening. /ubbthreads/images/graemlins/shocked.gif
 

iceman69510

Turn Right Racing
Staff member
Joined
Mar 5, 2001
Messages
10,964
Location
Michigan
Sure it is not just the crank pulley separating?
 

Defiant

Well-known member
Joined
Sep 7, 2012
Messages
162
Location
Houston, TX
/ubbthreads/images/graemlins/ooo.gif /ubbthreads/images/graemlins/crazy.gif /ubbthreads/images/graemlins/shocked.gif daaaamn
 

FlyingEagle

Staff member
Joined
Mar 5, 2005
Messages
1,635
Location
THE Ottawa
That was absurd. To the point of lack of noise, considering what happens when things are out by thousands, not by whole numbers ...
 
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