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Can get the serpentine belt to stay on the crankshaft properly

(1999 Chevrolet Monte Carlo)
in Lees Summit, MO on January 17, 2016
Ok my problem is my serpentine belt is off a couple notches on the crankshaft it aligned the right way on the alternator and the water pump and the the other pulley and down the tensioner and even on the crankshaft but when I start the car it is been pulled a couple notches off of the crankshaft it hasn't fallen off it's quite a lot and squeals alot and you know it doesn't seem to be running as well as it should and I'm sure that it's going to break soon if I don't get it to stay on the crankshaft is there something I can do is the crankshaft adjustable or is there some other part that I missing
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Popular Answer
on January 17, 2016
Strongly suspect the belt TENSIONER ASSEMBLY since that's the only part that's not 'rigidly' mounted to the engine! .. Also make sure the water pump pulley does not have any free play in it with belt off as that is the next pulley the belt runs on and if water pump shaft bearing is worn, it can be causing belt *misalignment*.. which IS what's causing the problem you have! .. As usual there is no engine size posted but this should hold true for the 3.1L or the 3.8L engine.
on January 17, 2016
Sorry its who is the 3.1 liter v6 and thanks I will check that immediately because I need the car running if there's anything else you could tell me that would be great but thanks for your input
on January 17, 2016
Check to see how much play is in the tensioner arm and pulley using a screwdriver moving back and forth from engine toward passenger fender... Reverse belt in case the outer edge has been damaged or altered by running off crank pulley.. That belt may have to be replaced if damaged!.. LOOK for any misalignment from pulley to pulley.. Good luck!
on January 18, 2016
Ok I have done what you have said and the only pulley that is misalign is the crankshaft itself and its out further than any of the other pulleys is on the motor so I'm confused I've watched a lot of videos on pulling the crankshaft pulley but I don't need to pull it I need to push it back in but I can't get the bolt boatbroke loose from the crankshaft itself.. is it possible that the crankshaft has gotten pulled out by the motor or the belt because it seems to be in there very very tight and I don't see how that's possible but it's very clear by looking at it that it is out further than the the other pulleys if you can tell me anything else that would be very appreciative this is a nightmare I could take a picture and I will show you but I don't see you anywhere to send photos
on January 18, 2016
Ok, the belt is running off the INSIDE of the crank balancer pulley... The part you need is called a Harmonic Balancer... It is actually two pieces.. There is the 'center hub' and the 'outer ring' with a rubber sleeve between the two.. The outer ring has slipped forward and cannot be realigned in a manner that will be a permanent fix.. The ONLY cure is to replace the Harmonic Balancer.. I will see if I can find a video that shows how it's done, that's much better than reading about it! .. Plus it'll save a bunch of typing... Here is a link to a pretty good video on how to replace the balancer... Copy and paste it to watch: . .
on January 19, 2016
Ok..I did get it into alignment with the other pulleys and that was by taking a piece of wood a 2x4 and a hammer and tapping it back into alignment with the other pulleys it stayed on for quite some time and didn't overheat and I drove it up and down the street still have hardly any pressure all this started was because my pressure in my car has dropped and I can't go any faster than like 30 miles an hour in even less up the hill and I change the spark plugs which in this vehicle is a complete nightmare where you have to pull the engine forward and all kinds of nonsense just to get the spark plugs out which which have been in there for a whilehthe car has 217000 miles on it. So although I know its not permanent and I'm not sure I even how long it will stay on the way it is it did stay on probably not the best idea to do it that way but I was frustrated and pissed off at the time because of getting nowhere so hopefully it will stay on for a little while
on January 19, 2016
Good luck!
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