Crank pulleys.

[Sport/Truck]

What are you running for crank pulleys? The one on my truck was added after the PO put power steering on. it’s not inline with the water pump & alt.
I went to the wrecking yard looking for something but didn’t find anything. Anyone have suggestions?
It needs to be a 3 grove to work.
s/t

[hyarbour]

I think Summit sells crank pulley shims.

[k2c1959]

Originally Posted by Sport/Truck

What are you running for crank pulleys? The one on my truck was added after the PO put power steering on. it’s not inline with the water pump & alt.
I went to the wrecking yard looking for something but didn’t find anything. Anyone have suggestions?
It needs to be a 3 grove to work.
s/t

you probably have the wrong pulley, depending on if you have a short shaft or long shaft on your water pump. I have a 79 350 in my 67 and i bought an aftermarket 3 groove billet crank pulley and everything lined up fine. just made sure it was for a long water pump.

[67ChevyRedneck]

^Yep. I ran into this problem when adding my vintage air set-up.

Basically, the groove closest to the balancer should be AGAINST the balancer if you have a short water pump set up (which is what you would want if you have factory power steering).

If your pulley groove closest to the balancer is about an 1" away from the balancer, it's for a long water pump.

This is a pic of a long water pump set up.

The second is hard to see, but my new SWP set up, the pulley groove is against the balancer.

[67ChevyRedneck]

Also, the third groove is kind of an add on. Trucks that came with the two groove pulley had the power steering pulling is an add on that goes over and inside the two groove pully (at least the ones I've seen have).

You're probably having a hard time finding the pulley at a yard because all 73+ trucks used a long water pump. You'd need to find an original swp set up.... or go to Jegs or ebay...

[mrein3]

Originally Posted by 67ChevyRedneck

Also, the third groove is kind of an add on. Trucks that came with the two groove pulley had the power steering pulling is an add on that goes over and inside the two groove pully (at least the ones I've seen have).

You're probably having a hard time finding the pulley at a yard because all 73+ trucks used a long water pump. You'd need to find an original swp set up.... or go to Jegs or ebay...

Amen! I had a heck of a time with the pulleys the PO stuck on my truck. I kept snapping alternator mount bolts. I never got it straightened out until da-burb sold me a crank pulley off of an original setup.

Scan the parts board. People jump fast on AC brackets when somebody posts that they are parting an AC truck. After that dust settles ask if you can buy the crank pulleys. You may as well get the waterpump pulley too. That way you know you got a matched set.

[Sport/Truck]

It’s a short water pump & the pulley is against the Harmonic balancer. The first grove needs to be 5/8inch from the face of the harmonic balancer to match the water pump pulley.
Can someone double check this measurement for me?
If I shim this out I’m concerned that it will throw off my power steering alignment.
I’ll get a picture up tonight.
Thanks.
s/t

[Gray Ghost]

67CRN is right....the one I have has two pulleys, then a spacer and then a third pulley. That said my alt is off a bit and it makes it squeal...gotta fix that someday.

[67ChevyRedneck]

Is it possible you have the wrong water pump pulley? Does it look like the one in my second pic?

Does your truck have A/C? Is the upper pulley single groove or double?

Is your power steering off a 73+ truck or 68-72?

[Sport/Truck]

It’s a single pulley water pump pulley and it seems original. I’m sure the only thing that was changed was the bottom pulley, to accommodate the power steering. I don’t know what the power steering is off of, but the brackets that were used for the power steering pump were incorrect. I have the correct ones now. I plan on replacing the pump before I get this on the road. I can specify for a correct pump then. What should I ask for? (The engine is out at the moment)
s/t

[Scott68-93-97]

Not the best pic but I used all the 76 and newer brackets and accesorys and everything lined up even being bolted to the older style harmonic damper

[Scott68-93-97]

It sounds like the crank pulley was designed for use with the long style pump

If you dont mind paying for shipping I'll give you my original pulleys (what I have left)

[Sport/Truck]

Originally Posted by Scott68-93-97

It sounds like the crank pulley was designed for use with the long style pump

If you dont mind paying for shipping I'll give you my original pulleys (what I have left)

Thanks for the offer Scott, I don’t mind paying and may just take you up on the offer.
But can you measure from your Harmonic Balancer to the middle of your first belt?
BTW- I thought the inner most pulley is for the alternator? Maybe this has something to do with your alternator being on the Passenger side?
s/t

[prg machine]

I am in the same boat. I posted about stock pulley set up. I am probably going to the yard soon to scrounge stuff up. Could end up going Summit.

[Sport/Truck]

thanks, Matt that is exactly what I need. I have some pictures of my old pulley system, but it was nothing near correct. I have all the
original brackets now.
s/t

[68Stepbed]

Glad I could help. If you need any more help or any parts, let me know. I've done been through this battle, so I'm willing to help in any way possible.

[Sport/Truck]

Originally Posted by 68Stepbed

Glad I could help. If you need any more help or any parts, let me know. I've done been through this battle, so I'm willing to help in any way possible.

Is your first belt (center) 5/8 from the face of the Harmonic Ballancer?
This would help me determine if the water pump pulley is correct.
s/t

[skokie]

Just curious but what kind of belts are those?

[67ChevyRedneck]

Originally Posted by skokie

Just curious but what kind of belts are those?

I don't remember the name, but they look just like mine and I got them from Advance

[68Stepbed]

S/T here's my setup now. It should help to see what you need. I have a 2-groove wp pulley for a short water pump and a 3-groove crank pulley. My old setup in the pictures above were taken before the restoration. I had(I believe) a 2-groove wp pulley and a 2-groove crank pulley. The crank pulley had two peices. The crank pulley that turned the Water pump and alt. was directly aginst the balancer. The second piece of the crank pulley was basically an add on extension to work the power steering. Your crank pulley has three grooves. The one directly against the balancer should drive the wp and alt. The middle groove will be for A/C if you have it. The outside should drive the p/s.

I wouldn't be able to tell if you have the correct wp pulley just by seeing it. I'll try to check my old pulley in a little while to get dimensions for you. I'll try to see how long and deep the wp pulley should be. The oulley is at my dad's place, so I'll have to check it in a few minutes. Meanwhile, here some of my current setup.

Originally Posted by skokie

Just curious but what kind of belts are those?

They are Dayco TOP COG. They are the only kind of V-belt I will buy. Don't buy cheap stuff. You get what you pay for. My brother learned this lesson with his truck. He went to Auto Zone and told them he needed new belts. They automatically gave him the cheap ones. They haven't stopped squealing after a year.

[Sport/Truck]

Originally Posted by 68Stepbed

S/T here's my setup now. It should help to see what you need. I have a 2-groove wp pulley for a short water pump and a 3-groove crank pulley. My old setup in the pictures above were taken before the restoration. I had(I believe) a 2-groove wp pulley and a 2-groove crank pulley. The crank pulley had two peices. The crank pulley that turned the Water pump and alt. was directly aginst the balancer. The second piece of the crank pulley was basically an add on extension to work the power steering. Your crank pulley has three grooves. The one directly against the balancer should drive the wp and alt. The middle groove will be for A/C if you have it. The outside should drive the p/s.

I wouldn't be able to tell if you have the correct wp pulley just by seeing it. I'll try to check my old pulley in a little while to get dimensions for you. I'll try to see how long and deep the wp pulley should be. The oulley is at my dad's place, so I'll have to check it in a few minutes. Meanwhile, here some of my current setup.






They are Dayco TOP COG. They are the only kind of V-belt I will buy. Don't buy cheap stuff. You get what you pay for. My brother learned this lesson with his truck. He went to Auto Zone and told them he needed new belts. They automatically gave him the cheap ones. They haven't stopped squealing after a year.

Do you have any information on the pulleys in your last pictures / part #s? Are they hard to keep clean?
s/t

[68Stepbed]

Originally Posted by Sport/Truck

Do you have any information on the pulleys in your last pictures / part #s? Are they hard to keep clean?
s/t

S/T those pulleys I bought at a performence shop. Summit sells them also. They are about $40-45 a peice. You can get them in polished or machined finish. Mine are machined finish. I've never had much trouble keeping them clean. You can also paint them for a nice custom look. I painted the set I had on my 86. It's the last pic. I also have a decnt shot of my new aluminum pulleys.

Originally Posted by Sport/Truck

Thanks for the pictures Matt. I’ll check the other pulleys when I get home. I can quite make out if the pulley is 5/8 form the table I looks like it could be, but the angle is a little off for me to see for sure. The pulley on the bottom is the one that goes against the harmonic balancer?

The bottom pulley actually almost butts completly against the balancer. It sits about 1/16" of an inch off the table because it has a lip that slides into the balancer hole to keep it lined up. I've reposted this pic so you can see where it sat against the balancer. You can tell the way the paint is rubbed off. The second pic you can copy and blow up to see how close it is against the balancer.

[Sport/Truck]

Originally Posted by 68Stepbed

S/T those pulleys I bought at a performence shop. Summit sells them also. They are about $40-45 a peice. You can get them in polished or machined finish. Mine are machined finish. I've never had much trouble keeping them clean. You can also paint them for a nice custom look. I painted the set I had on my 86. It's the last pic. I also have a decnt shot of my new aluminum pulleys.




The bottom pulley actually almost butts completly against the balancer. It sits about 1/16" of an inch off the table because it has a lip that slides into the balancer hole to keep it lined up. I've reposted this pic so you can see where it sat against the balancer. You can tell the way the paint is rubbed off. The second pic you can copy and blow up to see how close it is against the balancer.

$45 each? I did a search on summit, and the ones I found $100 +! If anyone has a good source LMK.
If you could put a tape measure against the face of your harmonic B, and tell me what the measurement is to the center of the first belt. (I need 5/8) in one of your pictures it look like it could be...but a mounted measurement will be best.

I also checked my water pump pulley. It was within a 1/16 of your measurement. So I think it's ok.
s/t

[68Stepbed]

You can also check out Alan Grove. They have all dimensions listed on their site so you can determine what you need.

[68Stepbed]

OK my wp pulley dimensions are:
2 13/16" tall
5 13/16" wide
GM part #3995646 AH

Crank pulley dimensions are:
2 1/16" tall with ps pulley (this dimension will only be about 2" if installed to balancer)
6 3/4" wide
Single crank pulley for wp and alt part # 3755820 BC
ps pulley part # 3751232 BB