(1970 Olds 442 with automatic transmission)
Hi everyone:
Was leaving for the Olds Nat'ls in Nashville early tomorrow and have been working on my car all week. The car starts and idles great, but when I press the accelerator and the engine revs up, I have a loud "roar" coming from the front of the engine that I can't find. I would guess the problem would be mechanical as the driveshaft and and trans don't move in Park. The fan turns clear of the shroud and is not hitting it.

Here's the list of things I did on the car this week: New transmission pan, speedometer gear at transmission, trans filter and new modulator. New distributor cap and new spark plugs, (I have electronic ignition module so no points). Oil and filter change.

Any ideas?
Thanks in advance,
Frank in Florida

 

It may sound too simple, but could it be the clutch fan? They are supposed to make a loud roar when they you just start the car up. Revving it would make it louder. If it were the clutch fan, the noise would fade within a few minutes.

 

Ed:
It WAS the clutch fan. I picked another one up as I left town and put it on the car the next day on the show field. Thank you for answering.
Frank