Pulleys

**Joe Tutela (46448)** · January 24, 2007, 08:34 PM

Re: Pulleys

I GOT 1!! I found the 3921923-BM in the AIM!! its my crant shaft pulley. I still haven't found the other one...

**Joe Lucia (12484)** · January 24, 2007, 11:50 PM

Re: Pulleys

Joe------

The GM #3883263 is not a Corvette pulley, at all. It was used for some 1966-69 light truck applications. Your 3921923 crank pulley was used without any sort of add-on pulley for many Corvette big block applications. This was regardless of how the car was otherwise equipped (i.e. regardless of A/C or PS, etc.).

You mention that the car does not have AIR. That means that someone previously removed it. ALL 1969 Corvettes were originally equipped with AIR.

**Joe Tutela (46448)** · January 25, 2007, 10:41 AM

Re: Pulleys

Thanks Joe. I had originally thought that all the 1969 Corvettes were AIR equipped, but this car has a service replacement engine (casting date 1972), so I guess whom ever replaced it just threw the AIR stuff away. The exhaust manifolds have the AIR holes, but they are plugged with fittings. I asked a local person that runs a Corvette restoration and sales business, and HE told me only the 1969 California cars had AIR...Oh well...This is why I come here to the experts. Thanks again and regards...joe 46488

PS: I guess tha fact that the AIR system is gone won't bode well for judging, but I feel like we (the car and I) are happier without it...jt

**Joe Tutela (46448)** · January 25, 2007, 10:46 AM

Re: Pulleys

One more item? I guess this also explains why the car (before I sent it out for work) had TWO belts from the crankshaft pulley to the water pump? I always thatought that was the original configuration, but now, if I analyze this, that second water pump belt was for the AIR pump?

Thanks again...joe

**Joe Lucia (12484)** · January 25, 2007, 04:01 PM

Re: Pulleys

Joe-----

The person that told you that only California Corvettes for 1969 were equipped with AIR is 100% wrong. That was true for 1966-67 Corvettes. However, for 1968-69, ALL Corvettes had AIR. Period. The fact that you have manifolds with AIR fittings is further testament to the AIR originally being present (assuming that the manifolds are original to the car and I'll bet they are).

I can guarantee you that showing up with a 1969 Corvette without AIR on the judging field will be cause for a significant deduct.

The AIR system does not generate any problems on a Corvette or any other car. That's a wide-spread misconception that dates back to the origins of AIR. I used to think so once-upon-a-time, too. I learned years ago that I was wrong.

**Joe Lucia (12484)** · January 25, 2007, 04:11 PM

Re: Pulleys

Joe-----

All 1969 Corvettes with big block used a 3 groove waterpump pulley except L-88/ZL-1. The latter applications used a 2 groove pulley with a single groove pulley "sandwiched" on the front, so there was, effectively, 3 grooves even on these applications. The OUTER groove was used for the AIR pump drive pulley on ALL applications. It was also used for A/C compressor drive for C-60 applications.

The INNER groove was used for a captive belt between the waterpump and crank pulley for ALL 1969 big block applications (although big block with C-60 used an idler pulley on the "captive" belt).

**Joe Tutela (46448)** · January 25, 2007, 06:50 PM

Re: Pulleys

Joe: Thanks again. I am consistently amazed and appreciative of the information made avaiable as outgrowth from some of my less than erudite questions. I am in the process of assembling the front accessories PS/AC/ALT/ and water pump. I can't WAIT to see how this is all going to look when I am missing one of the components! I am sure I'll have more questions or issues. Deepest appreciation and regards...joe
PS No offense, but I STILL like it better without that BUFF (if I may steal an acronym for big ugly fat fan) on the front of my engine...jt

I LOVE THIS PLACE

Pulleys

Pulleys

Comment

Comment

Comment

Comment

Comment

Comment

Comment