Thanks but that isn't it. Brakes have been check and and are good.

Is the torque from acceleration twisting the engine enough so a pulley is rubbing?

I had this happen on my '75 where the power steering pump pulley was rubbing on the cross-frame under the pulley.

Interesting. How did you confirm thats what it was?

I could see some shinny on the outside of the pulley.  The pulley sits in a bit of a well in that part of the cross-frame, and it is quite close to begin with.

We put a shorter belt on the PS pump, which then caused the alternator belt to be too close to the shaft of the PS pump, so we changed the pulley on the alternator to a double pulley, and moved the belt to the outer part of the pulley so the belt ran in front of the PS pulley (at least that is the way I think I remember it. . .).

Fan hitting the shroud...

Joel Adams
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I will definitely check that out and thanks. 

Thanks but thats not it. I know that sound from experience unfortunately....lol

Here's a possibility. Check the fan mounting hub, and pulley to the waterpump. It may be loose. Mine runs very close to the waterpump. The torque on it may be enough to flex it to rub.

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Thanks so much for replying but I am sure it is not that. It seems to be coming from underneath the car but you know how car noises are, you think they are coming from someplace and it ends up being somewhere else. I saw some stuff on the interent that it could be the universal joints which I am going to check out this weekend along with a couple of other possibilities.

Check you engine mounts. A broken mount will reposition your engine on acceleration causing something to rub that you otherwise don't hear.

Jan Gerhart

Something I forgot to mention before, but I've seem many times...check the harmonic balancer on the engine. If the rubber ring(elastomer, actually) between the outer ring and the center of the hub is deteriorated, it can allow the outer ring to spin out of position, and scrape/rub on the timing cover. Sometimes they will also vibrate, since the balancer is out of whack, but not always. Just a thought....

Joel Adams
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My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"