ASP Pulley On A 3G Alternator?

93tealstang · Apr 7, 2005

This is really making me mad. I've tried several times to put an ASP overdrive pulley on my 3G to help charging at idle. I've done this with a few different pulley combinations and I have the same problem everytime. I have a a loud, high pitched sound whenever I first start the car up and that's the only time I hear it. I figure it has to do with the alternator pulley somehow because that's the only time it makes the sound. I've tried two different belts and still have the sound. I would really like to know what causes this because it's starting to be annoying.

5spd GT · Apr 7, 2005

I'm going to "subscribe" to this because I have a overdrive ASP pulley waiting to be put on my 3g Alternator...

04sleeper · Apr 7, 2005

I run one on my car and several freinds cars as well and have no problems.

I would check the clearence between the pulley and alternator housing to see if it is touching. It is a very close fit.

93tealstang · Apr 7, 2005

93tealstang · Apr 8, 2005

Ok, so I even tried a stock 2G pulley on the alternator and it still made the sound. It seems if I go any smaller than the stock 3G, I have this sound. WTF???

Stang8URMPRT · Apr 8, 2005

I installed the overdrive pulley and I have the EXACT same problem... a very high pitch squeek when I start the car, but I know it's because I need a 1/2 inch shorter belt. Look at the "range" on the belt tensioner... I'm sure it will be either out of range, or very close... needing a shorter belt... I'm gunna buy one soon, when funds become available... Workers Comp blows and pays s h i t.

5spd GT · Apr 8, 2005

I get a squeel with my belt with the stock 3g pulley on my paperformance alternator (don't know if the pulley size is different?).

I wonder if you have the improper belt length or something which is being "pro'ed and con'd" with the different size pullies.

04sleeper · Apr 8, 2005

5spd GT said:
I wonder if you have the improper belt length or something which is being "pro'ed and con'd" with the different size pullies.

Could be a possibility.

GroverDill · Apr 8, 2005

remove belt and start.

go from there.
also too uch belt dressing can make them squeal.

93tealstang · Apr 9, 2005

I've tried two different belts and ofcourse two alternator pulley's with no luck. I'm always within range according to the tensioner. I'm at dead center or a little to the left. I barely can slip the belt under the tensioner when I have it the whole way open. I just can't believe it's my belt slipping since it appears to be tight enough. The sound it makes sounds like a very sharp, and high pitched blow off valve.

Start the car without a belt? Is that possible? And exactly what does belt dressing mean?

93tealstang · Apr 9, 2005

TTT, for those few un-answered questions.

GroverDill · Apr 9, 2005

yes you can start the car with no belt, do go drivinge around but you will be fine.

belt dressing is a spary on sticky stuff to help improve traction of the belt and lessen squeals.

Mustang5L5 · Apr 9, 2005

I have the ASP on mine and it's fine.

Does it squeel with ANY pulley on it or just the ASP??

It may be the bearings in the alternator squealing...or it could be the tensioner pulley squeeling.

Squirt a little WD-40 into the tensioner and see if it squeals.

mackey · Apr 9, 2005

Running an overdrive pulley? I had 2 alternators go bad because of the engine over revving at the track. Not a good experience seeing the track is 40 mins away.

Mustang5L5 · Apr 9, 2005

If you run underdrive crank pulleys it evens out close to stock.

I did the calculations once on my March pullies with the ASP overdrive pulley and found it within 10% of stock RPM.

93tealstang · Apr 10, 2005

Mustang5L5 said:
I have the ASP on mine and it's fine.

Does it squeel with ANY pulley on it or just the ASP??

It may be the bearings in the alternator squealing...or it could be the tensioner pulley squeeling.

Squirt a little WD-40 into the tensioner and see if it squeals.

It squeeled even with a stock 2G pulley. Squeels anytime I run a pulley that's smaller than the stock 3G. I'll try the WD-40 though just to see if its the tensioner.

04sleeper · Apr 10, 2005

Mustang5L5 said:
If you run underdrive crank pulleys it evens out close to stock.

I did the calculations once on my March pullies with the ASP overdrive pulley and found it within 10% of stock RPM.

You are correct.

I just took my pulley off to sell the car because I had to put back the stock pulleys to run the smog pump.

If anyone needs one let me know.

Mustang5L5 · Apr 10, 2005

93tealstang said:
It squeeled even with a stock 2G pulley. Squeels anytime I run a pulley that's smaller than the stock 3G. I'll try the WD-40 though just to see if its the tensioner.

Are you sure it's coming from the alternator??

93tealstang · Apr 10, 2005

Mustang5L5 said:
Are you sure it's coming from the alternator??

95% sure it has to be. Only makes the sound with smaller alternator pulley's. I never have had this sound untill a I started swapping pulley's.

93tealstang · Apr 10, 2005

I'd try to make a video if I was certain someone on here would host it for me.

ASP Pulley On A 3G Alternator?

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ASP Pulley On A 3G Alternator?

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