Having problems lining up the pulleys - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Brock · 08-13-2008, 09:53 AM

I'm having my brother-in-law put the motor/tranny in my '68 stepper and we are having some issues. The motor is a 307 originally from a '70 (I think) fleetside, the guy I bought the motor from snagged the water pump (I can't complain I paid $20 for a running 307

). The problem is that the crank/water pump/alt pulleys aren't lining up. I think the first problem was that the water pump we tried was a corvette (1/4 inch shorter than the reg which is about right since it was about half a belt off). But now he says he swapped pumps and its still off. Any Ideas? This guy has 30ish years turning wrenches professionally so its not lack of knowledge. I'm just looking to see if there is a trick we might be missing?

sneakysnake · 08-13-2008, 10:55 AM

Man you can get into a hornets nest when it comes to mixing and matching pulleys. I dont know all the configurations and if you throw in 73+pulleys it just complicates things. I know there is a short water pump and a long and the pulleys dont all enterchange. I suggest look for a motor that has a simular set up to yours and measure and match the pulleys.

chevy_mike · 08-13-2008, 11:25 AM

Agreed, you can have short or long water pumps and the pulleys are different between those two. You really can't mix and match. Everything (pump, pulleys, brackets) needs to be either short or long pump style.

67ChevyRedneck · 08-13-2008, 11:30 AM

Quote:

Originally Posted by chevy_mike

Agreed, you can have short or long water pumps and the pulleys are different between those two. You really can't mix and match. Everything (pump, pulleys, brackets) needs to be either short or long pump style.

Yup, I learned all that crap the hard way when I installed my vintage air A/C kit and I tried to mix and match stuff, ended up getting a short water pump and all short WP pulleys as even the pulleys are different. You can click my vintage air install thread in my signature so see some of what I had to do. Read posts 9, 10 and 11 and check out the pics in that thread.

Huck · 08-13-2008, 01:36 PM

The 67-72 small block v8 trucks all used a short water pump. If you have any local salvage yards, look for a 67-72 chev-gmc and the altinator will be on the drivers side with the short water pump. Grab the pulleys and you should be good to go.

d10s69c10 · 08-13-2008, 01:45 PM

Wow i worked on this today.
yeah i have the same issue on my 69, motor is 84 or somthing...

From the crank pumps in about a 1/4 i used some 1/8 washers to get it closer since im not using a mech fan. and that got the alternator,waterpump crank fairly lined up. now my issue is that my power steering is 1/4" tucked behind the crank pully.

i got a complete set of pullies on my big blouck (serpentine) im gonna give them all a look over see if i can make somthing work there. ill keep you posted.

08-13-2008, 09:53 AM	#1
Brock upgrading to an older model Join Date: Aug 2007 Location: Sacramento, KY Posts: 346	Having problems lining up the pulleys I'm having my brother-in-law put the motor/tranny in my '68 stepper and we are having some issues. The motor is a 307 originally from a '70 (I think) fleetside, the guy I bought the motor from snagged the water pump (I can't complain I paid $20 for a running 307). The problem is that the crank/water pump/alt pulleys aren't lining up. I think the first problem was that the water pump we tried was a corvette (1/4 inch shorter than the reg which is about right since it was about half a belt off). But now he says he swapped pumps and its still off. Any Ideas? This guy has 30ish years turning wrenches professionally so its not lack of knowledge. I'm just looking to see if there is a trick we might be missing? __________________ 68 stepside, short-box, multi-colored (for now)

08-13-2008, 10:55 AM	#2
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	Re: Having problems lining up the pulleys Man you can get into a hornets nest when it comes to mixing and matching pulleys. I dont know all the configurations and if you throw in 73+pulleys it just complicates things. I know there is a short water pump and a long and the pulleys dont all enterchange. I suggest look for a motor that has a simular set up to yours and measure and match the pulleys.

08-13-2008, 11:25 AM	#3
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: Having problems lining up the pulleys Agreed, you can have short or long water pumps and the pulleys are different between those two. You really can't mix and match. Everything (pump, pulleys, brackets) needs to be either short or long pump style. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...

08-13-2008, 01:36 PM	#5
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	Re: Having problems lining up the pulleys The 67-72 small block v8 trucks all used a short water pump. If you have any local salvage yards, look for a 67-72 chev-gmc and the altinator will be on the drivers side with the short water pump. Grab the pulleys and you should be good to go.

08-13-2008, 01:45 PM	#6
d10s69c10 Built 4 Speed Join Date: May 2008 Location: Geneva FL Posts: 619	Re: Having problems lining up the pulleys Wow i worked on this today. yeah i have the same issue on my 69, motor is 84 or somthing... From the crank pumps in about a 1/4 i used some 1/8 washers to get it closer since im not using a mech fan. and that got the alternator,waterpump crank fairly lined up. now my issue is that my power steering is 1/4" tucked behind the crank pully. i got a complete set of pullies on my big blouck (serpentine) im gonna give them all a look over see if i can make somthing work there. ill keep you posted. __________________ 1969 C/10 Short Box: 496/T-56 in worx. "To Be Old And Wise, First You Must Be Young And Stupid"



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