tfringo

Hi, I have a smog pump I am restoring. I am looking for the long bolts that attach the pulley through the large spacer into the pump. Could have RBW or SBC or possibly TR head stamps and lock washers. There could be other head stamps that I am not aware.

Also have question about the black plastic fan. In about May of 72, were they using the square blade fan or the angled off blade fan? Thanks, Terry

tfringo

Bump it up. Thanks

toylman

Hi Terry, As you know the NCRS tech guide says the white fan was used on early 1972 production, then the black. I have a 7801149 stamped 14021S that has the black fan. I also was fortunate to buy for my '70 an original white fan, hoses, no AL pulley, spacer, and bolts which are TR's. Also, N bolts may be correct as well, but I am not sure.

tfringo

Do you have the bolts or are you just saying they are TR or N head stamps?

My pulley has the AL stamp after the part number. This system had a May June ish birthday.

tfringo

I pretty much have a complete smog system for a May June car including exhaust manifolds and injector tubes that go into the manifold. Just need a few things to make it complete.

Need the pulley bolts (do you know what head stamp they used). Need the short hose and possibly 2 of the 2/72 smog clamps.

Do you know if black fan was square blade or angled blade?

No, I'm not familiar withe 1972 cars. Thanks, T

tfringo

Bump

VETTEHEAD9

I have the bolts you need, $75.00 for the 3 free shipping. That date was not the square tip or whit fan.

tfringo

Thanks for responding. Would love to have them but wife just lost her job. All my play money is frozen.

I could trade for them. Do you need anything smog related ( I have a few things). I have some 68/69 stuff. Voltage regulators and horn relays.

Lots of little stuff.

Thanks

tfringo

I thought the square tip black fan came after the white fan. When was the square tip fan used?? Thanks

tfringo

I could do $30 for the bolts plus $2.50 shipping that be best I could do. Thanks.

toylman

The N's were supplied with a restored system I purchased dated for my Jan '70 LT1. It came with an repro fan AL pulley. My recent purchase for the hoses, No AL pulley, spacer fan and TR bolts from the son of a '70 LT1 owner.

tfringo

If you get a chance, could you send pictures of the bolt heads to tfringo@aol.com. Thanks!

toylman

pics sent

toylman

Square edge Fan dated May 20, 1972

1972corvette454

Did the 72 Corvette's 454 with May date codes also come with a white fan?
When did GM switch to Black Fans?

tfringo

Pictures appreciated. I do all sorts of things to clean up the pumps. I degrease them by soaking them in water and purple power. Then I scrub with alumibright. I also use naval jelly and a stainless brush. Sometimes steel wool. I just keep working on them untill they start showing a nice surface. I try anything, no particular order. Naval jelly works good but takes time. A fine wire brush on a wheel works but need to break it in on something else. Be careful or it will cut into the aluminum.

1972corvette454

Smog Pumps.
Did the 72 Corvette's 454 with May date codes also come with a white fan?
When did GM switch to Black Fans?

tfringo

Based on information I'm getting, I would say "no." But there are exceptions to everything almost. If putting a system together, I would lean towards black with square blades. But, being a big block might be the difference. You never know. But there is no difference in the pumps. I would consider the date of the pump more than build date of car. Maybe an early pump found its way onto a later car.

I would be careful changing something on what appears to be an original car.

tfringo

Bump myself......

tfringo

Bump