Timing belt sounds like crickets

[Colt45]

Have an awful sound coming from the belt area, pulled the crankpulley, belts and timing cover and started it up to see whats up.. everythings still torqued down and the belts not rubbing anywhere. Timing belt, B-Belt, waterpump, idler/tensioner pulleys and tensioner are all new (100km's old) tried re-adjusting the tension and still have this noise, its not the crankpulley, cuz its off right now. Anyone hear this b4? I can't seem to pinpoint where the noise is coming from.. definatly the belt area, mid to upper block.

Heres what it sounds like Wave file

 

[Colt45]

oh yeah, its a 91 turbo motor

 

[DarthBulk]

I couldn't connect to your sound file, but I had a cricket sound coming from the belt on a previous car I owned. It was because an accessory pulley was misaligned (turned at a light angle in comparison to plane made by the belt loop). This caused the belt to continuously squeal against that pulley. The way to fix it is to align the pulley correctly...maybe by loosening your accesories, then torquing them back down tight while holding it in alignment. That assumes that the bearings are still good in all your rotating accessories

 

[Colt45]

I don't have any accesory pulleys attached though..The waterpump pulley/belt isn't even on, neither is the crankpulley.. any other ideas?

 

[steve]

The tensioner arm itself? Did you check and grease its pivot point?

Steve

 

[Colt45]

I just checked the tensionor arm and everythings okay with it. Put it back together.. Squeeking came back about 15mins later, does this everytime i tear down the timing side then put it back.. any other ideas??

 

[DarthBulk]

It's possible your timing belt is squeaking against your idler or tensioner pulley.
Here is something a mechanic showed me to do, when checking for a squeaky belt. He would take a crayon, and draw with it on the back side of the belt that he suspected was squeaking (he did it while the belt was running, but I wouldn't do that). For example, if you suspect that your timing belt is squeaking against the tensioner or idler pulley, you draw with the crayon on the back side of the belt...this coats it with wax, which will make any squealing due to misalignment of the idler or tensioner pulley go away. If the squeaking goes away, then you know where it was coming from. Then you just try to align your pulleys better.
This is just an idea you might want to try...

 

[luv2rallye]

Could your crank angle sensor be rubbing?
Or idler or tension pulley bearing be sqweeking under load?

 

[Colt45]

I'll try the crayon and see if the wax stops it at all

It could be the idler or tensioner pulley, how would i narrow it down though? They are both new. As far as missalignment, they both just bolt in.. where/how could i align them?

How would i check the crank angle sensor? Is it not on the other side of the engine away from the belts? I'm really stumped on this one, but wanna get it taken care of to prevent it from developing into something worse, mabey i'm just paranoid

 

[luv2rallye]

A cricket sound is almost always the TB idler or tensioner pulley. If you have access to a stethoscope put it on each one when running to find out. Or the crayon idea sounds good. Or remove the belt and spin each one. Perhaps you got a new faulty one. Or if you didn't use factory parts, I've ALWAYS seen problems with after market TB idler and tensioner pulleys. They never are exactly the same and the TB shifts position (and rubs against things). Also did you replace the B belt idler pulley? The crank angle sensor is probably not your problem but it is located next to the crankshaft spocket (the circular metal shim that goes around with the sprocket goes thru it).

 

[WhiteCloud]

I bet you need a new tensioner pulley. If the part on the outside that rotates is failing, it could squeak. Usually on timing belt jobs you replace both the auto tensioner and the tensioner pulley as well as the belt.

 

[steve]

The crank angle sensor is probably not your problem but it is located next to the crankshaft spocket (the circular metal shim that goes around with the sprocket goes thru it).

Not on a '91 4G63T. Only has a CAS on the intake cam.

Steve

 

[Defiant]

I don't have any accesory pulleys attached though..The waterpump pulley/belt isn't even on, neither is the crankpulley..

What? Is this still on the stand, or what?

 

[Colt45]

I'll try out the stethascope, mabey it'll narrow it down for me, all the pulleys, belts, tensioners were mitsu parts, yes the b-belt is new also.

No it's not on an engine stand, i pulled the cover and just put the huge crank sprocket bolt back in, leaving all pulleys off, can't run it to long since the waterpump belt isn't hooked up.

The belt does skate back and forth on the intake cam and idler pulley less then an 1/8th of an inch, none of the belt ever walks off the pulley or gear.. it shouldn't walk at all though right? The cam gears arn't noticeable warped, but i geuss it could be a possibilty?

 

[Colt45]

Well, still stuggling with this problem, kinda paranoid about even driving the car in fear of something giving out. Any other ideas what it coule be? I'm thinking its related to the walking of the belt, but not sure whats causing that. It is real minimal, is this normal? Or should there be no visible left/right movement of it with the engine running. I'm still new to these engines and seems they are picky about eveything, so i followed every step exactly how it should be, but something wasn't good enough.

This noise is always at a slower rate then the engine itself also

 

[luv2rallye]

A small amount (<= 1/16") of TB left-right movement is ok. Don't know what your noise is but a cricket noise is almost always a bearing. You said you replaced the tensioner and idler pulleys but did you replace the B belt idler pulley?

 

[Colt45]

Yes, thats new also.. thats why i'm so confused, everything on that side of the engine that is belt related is new