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3 Groove Pulleys - Stumped

chevyaddict

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Jun 12, 2002
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894
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Tucson, AZ USA
Corvette
1990 Convertible
Hi all;
I'm a bit stumped. I'm looking in the eckler's catalog and on ebay and no one sells any 3-groove crank pulleys for my 68. Now, I had it off yesterday (I put in a new harmonic balancer because mine was shot). It "appears" that it is a 2-groove with a single groove on top of it because you could get the single groove to shift a bit but I couldn't get it to separate. Same deal on the water pump pulley. I have a 2-groove with a single groove that is separate that goes on top of it. Like a dork I didn't take it off and when I was taking the harmonic balancer off it caught the bottom of the water pump pulleys and bent them. AND my crank pulley is still out of round so I need to replace them all. What is stumping me is this 3-groove thing because nowhere can I find it obviously mentioning this configuration. The car is a PS and AC car, that is why there are three pulleys. Can anyone help?
 

chevyaddict

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Joined
Jun 12, 2002
Messages
894
Location
Tucson, AZ USA
Corvette
1990 Convertible
WAIT!

Ok, I finally did find a PS pump crank pulley - single groove... but again I couldn't get mine to separate... can someone just confirm for me that there is indeed two separate crank pulleys in my case - a 2-groove and then an additional single-groove????
THANKS!
 

korvettekarl

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Nov 24, 2003
Messages
472
Location
Las Vegas, NV
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2017 Grand Sport 90 ZR1 57 Bel Air
That is correct. They tend to be difficult to find. I do believe the chevy dealer in town had it, but was VERY pricey.
 

chevyaddict

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Joined
Jun 12, 2002
Messages
894
Location
Tucson, AZ USA
Corvette
1990 Convertible
That is correct. They tend to be difficult to find. I do believe the chevy dealer in town had it, but was VERY pricey.

Tell me about it! I did find one on ebay used... but I don't want to buy a used pulley. UGH. I did look more closely in Ecklers and it appears there is the single groove pulley - its gonna cost me over $200 to replace these! OUCH!!!!!!!
thank you!!!!!!!
 

KANE

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Joined
Mar 2, 2002
Messages
3,244
Location
KY
Corvette
Dark Blue 1982 Trans Am(s): Polo Green 1995 MN6
Ok, I finally did find a PS pump crank pulley - single groove... but again I couldn't get mine to separate... can someone just confirm for me that there is indeed two separate crank pulleys in my case - a 2-groove and then an additional single-groove????
THANKS!

They do come apart... it just takes a little "umph" sometimes.

Good luck!

chevyaddict said:
Tell me about it! I did find one on ebay used... but I don't want to buy a used pulley. UGH. I did look more closely in Ecklers and it appears there is the single groove pulley - its gonna cost me over $200 to replace these! OUCH!!!!!!!
thank you!!!!!!!

Used pulleys aren't bad unless they are warped or otherwise trashed.

Is the crank's powers steering pulley the same as water pump's smog pulley?- I don't know. If so, I have one that I just took off and I'd let it go for half what you quoted above. I took it off because I don't need it with my TPI system.
 
V

vmrod

Guest
SOB!!!! I can't believe $200!!!!

I had installed new chrome pullies on my car last year. I either gave away the old pullies to someone building a dragstrip car, or threw them out. Had I known, I owuld have put them on EBay! :eyerole
 

korvettekarl

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Joined
Nov 24, 2003
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472
Location
Las Vegas, NV
Corvette
2017 Grand Sport 90 ZR1 57 Bel Air
If you're not in a hurry I may be able to find some in my pile of stuff. Just get me a measurement of each grooves outside diameter and overall depth. If I have them they are yours for the cost of shipping.
 

craig32

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Joined
Sep 30, 2004
Messages
482
Location
PA
Corvette
1981 repainted black coupe
OK, I'm in the right thread now. . .I have a 3 groove crank set, a single inside of two, 7-3/4" diameter, OVERALL, not calipered at the bottom of the groove, with pn 458530CA - and a 2 groove crank pulley, 6-3/4" diameter, no pn that I can find. The 2 groove pulleys seem to have the same projection as the 3 groove set, as they are the same as the two outermost. If you can use either of these, let me know. I see now you need water pump pulleys, I didn't look at them!!!

Craig
 

chevyaddict

Well-known member
Joined
Jun 12, 2002
Messages
894
Location
Tucson, AZ USA
Corvette
1990 Convertible
OK, I'm in the right thread now. . .I have a 3 groove crank set, a single inside of two, 7-3/4" diameter, OVERALL, not calipered at the bottom of the groove, with pn 458530CA - and a 2 groove crank pulley, 6-3/4" diameter, no pn that I can find. The 2 groove pulleys seem to have the same projection as the 3 groove set, as they are the same as the two outermost. If you can use either of these, let me know. I see now you need water pump pulleys, I didn't look at them!!!

Craig

I'll be home later this evening and will measure them. :) THANKS!
 

Art Jett

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Joined
Mar 25, 2004
Messages
366
Location
Azle Tx.
Corvette
1977 TPI 383 stroker, 700R-4/ 2002 6 spd.
Dawn, I have the ones that came off my 77 L48. (crankshaft) I think they might be the same. If so and you are interested I would part with them for $50.00 + shipping from N. Tx. I've already bead blasted them and painted them gloss black. I went with an underdrive aluminum one from Summit. I also have the water pump pulley cause I went with an electric water pump. My car has a/c and p/s. E-mail me at ajett@coiltubingservices.com if you're interested. :beer Art
 

chevyaddict

Well-known member
Joined
Jun 12, 2002
Messages
894
Location
Tucson, AZ USA
Corvette
1990 Convertible
Dawn, I have the ones that came off my 77 L48. (crankshaft) I think they might be the same. If so and you are interested I would part with them for $50.00 + shipping from N. Tx. I've already bead blasted them and painted them gloss black. I went with an underdrive aluminum one from Summit. I also have the water pump pulley cause I went with an electric water pump. My car has a/c and p/s. E-mail me at ajett@coiltubingservices.com if you're interested. :beer Art
Hi Art - thanks but those are different - they won't work unfortunately. :(
 

chevyaddict

Well-known member
Joined
Jun 12, 2002
Messages
894
Location
Tucson, AZ USA
Corvette
1990 Convertible
OK, I'm in the right thread now. . .I have a 3 groove crank set, a single inside of two, 7-3/4" diameter, OVERALL, not calipered at the bottom of the groove, with pn 458530CA - and a 2 groove crank pulley, 6-3/4" diameter, no pn that I can find. The 2 groove pulleys seem to have the same projection as the 3 groove set, as they are the same as the two outermost. If you can use either of these, let me know. I see now you need water pump pulleys, I didn't look at them!!!

Craig

Well, I've assessed things and the ones I have aren't too too bad..... so I think I'm gonna run with them for awhile. I'm hinky about putting used parts back on a car if I can buy new, so I think I'll just save up and buy new ones. Thanks SO MUCH for taking time to look for me though!!! :) :beer
 

Evolution1980

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Joined
Feb 25, 2002
Messages
4,302
Location
Cleveland, Ohio
Corvette
ZZ4, 700R4, Steeroids rack & pinion, VB&P Brakes
Have you considered seeing if March has a suitable underdrive pulley set? Check here for a start...
 
B

bubba2711

Guest
OK, I'm in the right thread now. . .I have a 3 groove crank set, a single inside of two, 7-3/4" diameter, OVERALL, not calipered at the bottom of the groove, with pn 458530CA - and a 2 groove crank pulley, 6-3/4" diameter, no pn that I can find. The 2 groove pulleys seem to have the same projection as the 3 groove set, as they are the same as the two outermost. If you can use either of these, let me know. I see now you need water pump pulleys, I didn't look at them!!!

Craig
What engine, year, model is this 458530ca pulley off of? I'm from team chevelle and this my first post here. :w
Thanks in advance. Ron.
 

craig32

Well-known member
Joined
Sep 30, 2004
Messages
482
Location
PA
Corvette
1981 repainted black coupe
Ron, I have no idea where they came from. I took a bunch of engines apart and saved some stuff and got rid of others. Probably 60's something, I had a 67 El Camino engine in my 57, and I had a 69 327 I took apart - could be from either one of those. It seems like I had a couple other cars I bought for parts, but don't think they had engines in them. Sorry I can't be of more help!

Craig
 
B

bubba2711

Guest
Pulley

Thanks craig. I thought it was small block from the small center opening.
 
B

bubba2711

Guest
:JWell it's a non issue now that i'm sending them back to the previous owner.:D
 

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