Serpentine belt keeps falling
 

Hello out there, I have a problem with my serpentine belt falling off. I replaced the tensioner, though belt is still falling off, it is also making a sqeaky noise though can't figure out where it coming from, I wanna say from the crankshaft pulley, but not sure. Anyone had similar problem? Please help...

I've seen this issue before the belt is just a shade to long and or the tensioner is not extending fully. I have had Goodyear belt on now for 5 years but had to go thru two belts to get the correct length.

Is it possible the tensioner is not on right?

The belt drives the alternator and the A/C, so there are the other 2 places to look for noises.

I forgot to mention, I recently swapped out motors for a 2007 2.2 Malibu motor, would the belt size change? I asked for one for the hhr.

Yes it could be different, ask your parts counter guy

Agree

Oh, I forgot to mention........?

Well guys the Malibu belt didn't work, and bought another hhr belt and also didn't work

It sounds like you have a belt alignment problem. If the belt pulleys are not in align with each other the belt will make noise and or will ride to one side until it jumps off.

Use a good flashlight and look down from the top and you will see one of the pulleys out of alignment. It don't take much to cause problems.

You changed the engine with a Malibu. Maybe the a/c bracket or the crank pulley is different.

Hey Mmgsxr750,

I know you're reaching out to the incredibly helpful DIY community here, but if you'd like to have this issue looked at by your local Chevrolet dealership, we'd be happy to assist with that. Just send us a PM with your VIN, mileage, preferred dealership and contact information and we can share your situation (including the Malibu motor) with them. They would then contact you to set up a service appointment.

Let me know if this is something you'd like me to proceed with.

Geoff G.
Chevrolet Customer Care

I wonder, if the crank pulley was left on the Malibu engine, and the A/C and the alt pulley are from the HHR, could it be that a smaller belt is required? Do you have the original HHR crank pulley to measure the diameter or the circumference to see if it matches the Malibu pulley?
I hope I got that correct.

I did a little research a found aftermarket crank pulleys are the same from Malibu to hhr but if you look up a Delphi a/c compressor the Malibu is cs20063 and the hhr is cs10077.

I wonder if the a/c clutch is different?

So my question would be did you reuse the hhr a/c compressor for the install?

What about alternators? I have a feeling the Malibu would be different.

Good point. I looked that up and there are two different part numbers for hhr and Malibu

So then the alt pulley may be the culprit!

I'll Check on that, thanx guys

Let us know !

Well fellas it turns out the ac compressor was missing 2 bolts, and it was starting to lean to the side. I guess the mechanic who did the engine swap didn't put all the bolts on. Just started running it today, hopefully this was the cause of the belt coming off, thanx for the help though guys

Glad to here you got it figured out. Sound like an easy repair.