Team Camaro Tech banner

1 - 15 of 15 Posts

·
Registered
Joined
·
786 Posts
Discussion Starter #1 (Edited)
Hey guys, I don't think I've been on here in years - I've been on two back to back deployments. Im finally back 'home' and hope to get some work done on my Camaro.

68 w/ a 327 w/ PS

Like others, my pulleys dont line up after my rebuild a few years ago.
I just went and pulled the pulleys off and the numbers are:
WP - 3788472
Crank - 3755820BC & 3751232BB
PS - 3941107DE

The only ones that I could find using CRGs list is for the crank pulleys which said it was for a 67 SBC and I just edited this because I found the PS pulley is for a 69 BB and maybe 68 & 69 small blocks. I've searched all over for the other part numbers and drawn a blank. Im sure I'll just need to order new ones that are correct, but can anyone tell me what these pulleys are actually for? So, that leaves me scratching my head about the WP pulley, which is the one that caught my attention as to not being in line w/ the others.
I will have AC (Vintage Air) - so if these pulleys are all wrong (which I assume they are), can you point me in the right direction? I've read that using the Z28 pulleys is a better bet, but might not work out since I will have air.

Thanks guys, and I hope I'll be on here bugging yall again like I was before :)

John
 

·
Registered
Joined
·
786 Posts
Discussion Starter #2
Ok, let me start over since I got no bites on the above post.
I need all new pulleys, and need your help. The pulleys on my car are all wrong so Im starting over.
68, 327 w/ power steering and Vintage Air AC.
First question - can you mix 68 Z28 pulleys w/ standard 68 pulleys - in other words, will the deep groove pulleys work and play well with standard pulleys. This will pose an issue since I have AC and don't have a choice to swap in a deep groove pulley.
Please check out the below list of pulleys and please tell me if Im tracking. I have seen the pulley matrix and the original part numbers - but since I don't have a vehicle listed in the matrix exactly, and original part numbers don't help anyway when buying new pulleys w/ new part numbers from Classic or Year One, Im still stuck like chuck.

If I CANT mix Z28 and regular: (Part #s from Classic Ind)
Crank: G7189 (2 groove, listed as a 67 pulley, but they don't show a 68 2 groove except for the Z28 style) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=G7189&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=21324&productSearchCatalogId=1
Crank Add-on (for AC): G7190 (1 groove, listed for 67 & 68 and as a match for the above crank pulley) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=g7190&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=21325&productSearchCatalogId=1
PS:K1093 (1 groove) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=k1093&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=69146&productSearchCatalogId=5
WP: G8356 (2 groove) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=g8356&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=23170&productSearchCatalogId=1

If I can mix Z28 and regular:
Crank: G7194 (2 groove, listed as 67 & 68 Z28 pulley) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=g7194&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=21329&productSearchCatalogId=1
Crank Add-on (for AC): G7190 (1 groove, listed for 67 & 68 and as a match for the above crank pulley) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=g7190&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=21325&productSearchCatalogId=1
--- OR, K1059 (which is listed as an add-on crank pulley for PS - it says it should be used with G7189, which is a non-Z 2 groove pulley. http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=k1059&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=69151&productSearchCatalogId=1
PS: M1860 (1 groove - says its not for cars w/ AC, so do I stick with the one above?) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=m1860&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=67186&productSearchCatalogId=1
WP:GH1013 (Z28, two groove) http://www.classicindustries.com/controller.cfm?type=product&action=productDetail&partNumber=GH1013&startRow=1&sortBy=1&sortOrder=1&resultsPerPage=10&currentPage=1&productId=115998&productSearchCatalogId=1

I have the correct mounting brackers for my PS pump. However, if you tell me I need X,Y or Z pulleys, and by doing that I need a new bracket for the pump, please let me know so I can order it all at the same time.

Thank you guys, I hope someone will chime in this time.
 

·
Registered
Joined
·
7,795 Posts
The first thing you need to know is that there are pulleys for cars with short water pumps and for cars with long water pumps. There is also different sets between big blocks, small blocks and 6 cylinder engines. That means there are 5 sets of pulleys, and you can not mix them !

'67 and '68 Camaro's have short water pumps.
1969 Camaro's have long water pumps.

To tell which you have, the alternator on short water pump vehicles is usually on the drivers side. Vehicles with a long water pump usually have the alternator on the passenger side.



Your car is a 1968 with a 327. That means short water pump, small block.

Do you need the "correct" GM pulleys ? If not, this web site may be good for you.
http://www.hotrodchrome.com/pulleys.html
 

·
Registered
Joined
·
786 Posts
Discussion Starter #4
TJS69 - Thank you, yes, I didn't mention that I have a short pump. I didn't only cause I figured that would be assumed by the year. I checked out the page you sent, thank you. I'm not as much interested in 'correct', but functional and not really looking for chrome. Probably not too many people in the market for all new pulleys, and Im not real sure how the PO made any of it work. I've never had the car running, but during mock up I noticed the all to common "my pulleys dont line up" problem. That led me to looking up the original numbers stamped on them (my original post) and the fact that they were all wrong except for 3751232 = crank pulley extension.
 

·
Registered
Joined
·
6,217 Posts
John, why don't you check with your local GM dealer using the original numbers you found (Camaros dot org? http://www.camaros.org/pdf/pulleys-68-2007-02-01.pdf). I just bought two 68 Z28 crankshaft pulleys a couple of weeks ago and they were still available. The Z28 pulleys are the deep groove ones by the way. Last three numbers on the crank pulley were 533.
 

·
Registered
Joined
·
7,795 Posts

·
Super Moderator
Joined
·
32,355 Posts
Chevrolet Power Book, 4th Edition, 1980
3858533 Pulley crankshaft, 2 groove, Deep groove
3770245 Pulley, Water pump, 2 groove, Deep groove
3720616 Reinforcement W/P Pulley
9433722 Belt, Fan & W/P, 34 X 3/8

From the engine out, first groove is for crk, w/p, & alt
Second groove is crk, w/p, & A/C
Power steering pulley is an add-on to crankshaft and belt to P/S pump only.

Thanks to you and your family for your time serving. Welcome back, John.
 

·
Registered
Joined
·
2,920 Posts
John first off thank you for your service to our country!

I'd recommend using the items Everett so accurately described, those are used in the 68 Z/28 set up. In addition to that I have a few other short water pump pulleys that might work for you. Yes you can mix deep groove with standard groove, it won't hurt a thing. I'd try for the deep groove set up though myself that's what I run, same as Everett posted.

Crank
3744043 2 groove (I have used this standard pulley with the 3770245 DG WP pulley
3858533 2 Deep groove used with 3770245 wp pulley
3916385 single groove added on to crank pulley for use with power steering

Power steering
3873847 deep groove cast iron Z/28 power steering pulley 67-8 (most were manual steering)

Water pump
3900434 use with 3744043BA per 68 Camaro assy manual
3790356 use with 3744043BA
3770245 2 Deep groove Spec HP solid lifter SBC 63-68 Corvette, 302 Camaro 7 1/8” diameter, small hub, 5/8” pilot hole use with 3858533 crank pulley
3724816 2 Deep groove 59 Corvette
3788472CG Single groove 64 Corvette 7 1/8” diameter
3876846 63 Corvette 327 / 300 hp
3942992 2 Deep groove, large hub, 5/8” pilot hole, rework to large pilot hole
3720616 Reinforcement, small hub, 5/8” pilot hole

Alternator
1970831 68-70 Z/28 deep groove 3.2 inches
3829387 67 Z/28 deep groove 3.6 inches

Good luck with your project!

Dave
 

·
Banned
Joined
·
21,341 Posts
And fwiw, ALL my 350SS pulleys are now on my 496 w/ a S/W/P!

That said, the only acc. I have is just a bolt-on crank P/S pulley and my alt pulley is a stock deep groove GM jobber b/c I bought it thinking that the low groove stock 350SS pulley was allowing my junk301 to throw my alt belt off at rpm!

NOT SO, my alt front bearing was going bad instead!

pdq67
 

·
Registered
Joined
·
786 Posts
Discussion Starter #10 (Edited)
Thank you guys for the kind words and support. 27 out of the last 36 months I've been down range and its great to finally be back home and working on the car.

You guys provided some great info and Im now able to move forward. I dropped an order from GM Parts direct, Year One and am about to drop one for Classic Ind as soon as I can track down one of their discount codes :) (anyone got their latest email? I remember getting one but must have deleted it)

Crank - 2 groove deep / 3858533 GM Parts Direct
Power Steering - deep cast / 3873847 = Q38 Year One
Crank add on - PS deep / 3916385 = 823N Year One
Alternator deep / 3829387 = KW608 Classic Ind
Water Pump - 2 groove deep / 3770245 = GH1013 Classic Ind

Thank you!
 

·
Registered
Joined
·
786 Posts
Discussion Starter #11 (Edited)
Guys - Hopefully this will be helpfull. I accidentally ordered one pulley wrong, but based on everything yall provided and lots of looking in parts catalogs etc - here is what the original GM part numbers cross over to. Some I haven't physically verified (thankfully, that would have meant I ordered the same pulley from two sources), but by reading the descriptions and studying the pics in the catalogs, Im pretty sure its correct.



Hope this helps someone else down the road.
 

·
Registered
Joined
·
2,920 Posts
Thanks for the info John! Hope the project is coming along well.
 

·
Registered
Joined
·
620 Posts
i had a similar issue with my pulley, i had camel hump heads or something and needed a bracket and stuff anyways i actually i a cool speed shop that was at least willing to help me go through several pullies.. its frustrating dealing with catalog ordering at times and having to wait for the darn thing to come in than find out its the wrong part!
 

·
Retired
Joined
·
16,005 Posts
I have 2 of those 3755820 BC pulleys, they go to 67 camaros small block crank and also in 55-57 Vette V8's. They are single groove, 12 hole 1 1/16" center hole. I researched a bunch of pulleys I got in a garage sale about 4 years ago. :) hope this helps.
I printed out the PDF that Camaro Research Group has on their site, its pretty handy. www.camaros.org
 

·
Registered
Joined
·
786 Posts
Discussion Starter #15
Sorry to pull up an oldish thread - just got my 'last' pulley in the mail, Classic PN G1790 and it was actually GM part number 3751232 - not what I needed. Finally figured it all out and ordered Classic PN K1059, which is GM PN 3916385. Grrrrr
So, updated chart -


 
1 - 15 of 15 Posts
Top