If it ain't one thing... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pritch · 03-17-2005, 10:40 PM

It's another. I thought I could see if I could get my motor to light up tonight, but when I went to put on the pulleys and fan and spacer, the bolt holes in my water pump are the wrong pattern.

All my chevy stuff is the correct. My old WP is correct. I don't know if GM used other bolt patterns for other brands, or if the re-man'er screwed up or what. I guess I could drill and tap new holes, but it won't be 'til next week sometime before I'm around a drill press and taps.

Solver · 03-17-2005, 10:49 PM

I have been through the waterpump deal before
seems chevy did make 2 different hole spacings for the water pump.
I picked one up at orielly's parts the other day and it had wrong spacing. took it back and they gave me one that was drilled for either or.
They make 2 different ones . if it's new tsake it back and they will probably exchange for the other type

Longhorn Man · 03-18-2005, 12:44 AM

The short water pump has one bolt pattern, and the long water pump has another pattern. Yet, they didn't chainge anything when they went to reverse flow water pump.

Some are drilled for either or, which can make things even more confusing sometimes when you are trying to get the fan 1/2 into the shroud like it is supposed to be...or trying to keep the fan off the alt belt.,..or any other wild crap that happens up there.

GMC AMI · 03-18-2005, 08:00 AM

I have the a double fan pulley or a single one with both bolt patterns if you can not find one. 10 bucks shipped to you.

danho · 03-18-2005, 11:00 AM

Yep, had the same thing happen to me. If it's new, exchange it. There are 2 bolt patterns on the short water pumps.

Putter · 03-18-2005, 11:11 AM

Screw it....go electric!!! I had the same problem. The fan wouldn't bolt up to the long water pump. Figured..."hey, why not go electric?"

03-17-2005, 10:40 PM	#1
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	If it ain't one thing... It's another. I thought I could see if I could get my motor to light up tonight, but when I went to put on the pulleys and fan and spacer, the bolt holes in my water pump are the wrong pattern. All my chevy stuff is the correct. My old WP is correct. I don't know if GM used other bolt patterns for other brands, or if the re-man'er screwed up or what. I guess I could drill and tap new holes, but it won't be 'til next week sometime before I'm around a drill press and taps. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

03-17-2005, 10:49 PM	#2
Solver Registered User Join Date: May 2000 Location: Storm Lake, Ia Posts: 1,449	I have been through the waterpump deal before seems chevy did make 2 different hole spacings for the water pump. I picked one up at orielly's parts the other day and it had wrong spacing. took it back and they gave me one that was drilled for either or. They make 2 different ones . if it's new tsake it back and they will probably exchange for the other type __________________ 1972 Cheyenne Super 20 LWB-Blue 1972 Cheyenne Super 10 LWB-Black 1972 Cheyenne Super 10 LWB-Red 1972 Cheyenne Super 10 LWB-green 1972 GMC 4x4 LWB-White 1971 Cheyenne 10 LWB-Ochre 1971 Cheyenne 20 Longhorn-Copper 1971 Cheyenne 20 Longhorn-Black 1969 Custom 10 LWB-lt blue 1968 GMC 3/4 ton-green 1968 1/2 ton swb stepside-silver 1967 Chevrolet CST 10 LWB-green 1967 Chevrolet custom 20 LWB-Maroon

03-18-2005, 08:00 AM	#4
GMC AMI Registered User Join Date: Apr 2004 Location: The Other Maine! Posts: 2,236	I have the a double fan pulley or a single one with both bolt patterns if you can not find one. 10 bucks shipped to you. __________________ 1968 Chevy 4x4 307 4 speed

03-18-2005, 11:00 AM	#5
danho Pesemistic Optimist Join Date: Dec 2002 Location: Prineville, Oregon Posts: 227	Yep, had the same thing happen to me. If it's new, exchange it. There are 2 bolt patterns on the short water pumps. __________________ 1972 K20 Cheyenne Super Custom Camper- 4" lift & 35's, built TH350 and 355. Daily driver resto in progress. 1999 Yukon Denali- Wife's ride, hands off.

03-18-2005, 11:11 AM	#6
Putter More Cowbell.... Join Date: Mar 2004 Location: Puckett, MS Posts: 3,569	Screw it....go electric!!! I had the same problem. The fan wouldn't bolt up to the long water pump. Figured..."hey, why not go electric?" __________________ *There once was a member from Puckett.....Who ( fill in the blank blank blank* ) bucket**

03-18-2005, 12:44 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The short water pump has one bolt pattern, and the long water pump has another pattern. Yet, they didn't chainge anything when they went to reverse flow water pump. Some are drilled for either or, which can make things even more confusing sometimes when you are trying to get the fan 1/2 into the shroud like it is supposed to be...or trying to keep the fan off the alt belt.,..or any other wild crap that happens up there.

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