Weird engine Squeal help?

[parkdog]

i just changed all my belts on my 1.6td jetta but it still makes the noise that an old or loose belt would the alternater was rebuilt before i got the car. It does it sometimes when i make a sharp turn. also when im driving if i psh the clutch in it will stop any suggestions?

[rabbitman]

also when im driving if i psh the clutch in it will stop any suggestions?

Sounds like something tranny related.

[Smokey Eddy]

yeah if you hadn't said the part about the clutch i was going to say ... your battery could be dead and the load on your alternator is causing the belt to slide and make a squeal OR if the plastic cover has come loose and it's rubbing on the accessory belt that also can cause squealing.
Also, if you put the timing belt tensioner on backwards it will offeset the belt and it will squeal but i don't think that's the case.


Is there oil in the transmission?

[truckoSaurus08]

You migh have worn pulleys.

[8v-of-fury]

You migh have worn pulleys.

take off your pulleys and rough them up with a wire wheel. When they go smooth they have trouble getting traction on belts and thus they slip and squeal.

[clbanman]

If it is more or only noticeable in 5th gear then I would say it is definitely transmission oil level. 
I have what sounds like a similar issue on my car if I don't keep the alternator belt tight.   It usually starts when raining (belt wet) and if I don't do anything it gets worse until it does it even when dry.   I have noticed that pushing in the clutch or putting the trans in neutral will stop the noise - if I release the throttle.  This is really only because it drops engine rpms to the point where the belt can "grab" the pulley again. 

[Rabbit on Roids]

If it is more or only noticeable in 5th gear then I would say it is definitely transmission oil level. 
I have what sounds like a similar issue on my car if I don't keep the alternator belt tight.   It usually starts when raining (belt wet) and if I don't do anything it gets worse until it does it even when dry.   I have noticed that pushing in the clutch or putting the trans in neutral will stop the noise - if I release the throttle.  This is really only because it drops engine rpms to the point where the belt can "grab" the pulley again. 

all 100% true ^ ^ ^

except that i have to rev my car up to get the belt to quit squeaking. it idles a little high, i imagine every intake gasket leaks.. but it wont catch at low RPMs, i have to rod it to like 5 grand then let off. probably has alot to do with the powerful amp in the trunk..

[burn_your_money]

Is the noise constant?
Does it do it in neutral?
What effect does revving the engine have on the sound?

And as always, my cure all solution, the voltage drop test
http://www.vwdiesel.net/forum/index.php?topic=22321.0

[bajacalal]

If this noise stops when you push the clutch in, I would think it's transmission related or something like the throwout bearing (or whatever it's called in our backwards transmissions). My car has started doing this same thing but the noise stops when it's warmed up or when I push the clutch in and I know the transmission is due for an overhaul.

[parkdog]

the noise isn't constant it does do it in nuetral and it only started doing it when it started to get cold.

[Rabbit on Roids]

check the bearings in your alt. i bet they are getting ready to take a dump.

[parkdog]

ok yeah i thought it might have been the idler pulley but when i checked that it was smooth ive never worked on an alternator before tho.

[parkdog]

ok so upon further inspection i  watch the belts as they are running  the alternator belt is tensioned all the way but it still looks loose when the engine is running  you can see it kinda whip back and forther could this noise be due to that? the lady i bought the car off said the alternator was rebuilt and she said they couldnt figure out the noise so maybe its just the tension? i wont cancel out the suggestion of alternator bearing being the cause tho.

[Rabbit on Roids]

the pulley may be bent a little bit, or out of round. all it takes is a little zing to the pulley and its bent. then the bent spot has more or less tension depending on how it got bent.

[Black Smokin' Diesel]

I would remove all the belts to see if it's coming from the timing belt. You don't want that one to break. The tensioner could be the culprit. Don't run the engine too long as the waterpump isn't spinning. What accessories does the car have? Start by re-installing the belts one by one to help you find the problem.