Water pump studs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Harold Holbrook · 10-29-2019, 07:05 PM

I need the long studs for my 1971 chevy blazer 350 with A/C . The ones that hold on the clutch fan, spacer . and pulley to the water pump. I would like to have new , but good used ones will do.

Thanks

Andy4639 · 10-29-2019, 08:46 PM

Quote:

Originally Posted by Harold Holbrook

I need the long studs for my 1971 chevy blazer 350 with A/C . The ones that hold on the clutch fan, spacer . and pulley to the water pump. I would like to have new , but good used ones will do.

Thanks

ACE,Lowes and home improvement center will have them. They are 1/4"x20 bolts. Get the lentgh you need, get 4 flat washers and 4 lock washers.

Harold Holbrook · 10-30-2019, 07:01 AM

Thanks

Andy4639 · 10-30-2019, 07:23 AM

Quote:

Originally Posted by Harold Holbrook

Thanks

I live in Garden City SC!

**Boog** · 10-30-2019, 11:41 AM

You can also buy those water pump studs at auto parts stores. I believe the OE ones are fine thread on one end and medium thread on the other end. At least all mine have been.

Harold Holbrook · 10-30-2019, 04:08 PM

Thanks, I need to find out if a AC truck had a spacer. If id did I would need 2 1/2 inch studs. Fine threads 5/16 on the stop end that goes into the pump, 5/16 and medium that goes by the clutch fan.

Andy4639 · 10-30-2019, 05:40 PM

Quote:

Originally Posted by Harold Holbrook

Thanks, I need to find out if a AC truck had a spacer. If id did I would need 2 1/2 inch studs. Fine threads 5/16 on the stop end that goes into the pump, 5/16 and medium that goes by the clutch fan.

I have never seen a AC clutch fan with a spacer. Other than the one built into the clutch fan itself.

**Stocker** · 10-30-2019, 06:19 PM

Quote:

Originally Posted by Andy4639

I have never seen a AC clutch fan with a spacer. Other than the one built into the clutch fan itself.

Yessir, and I wouldn't even consider that to be a spacer. More like the mounting plate for the clutch unit.

Andy4639 · 10-30-2019, 09:06 PM

I'm curious of why you want the studs when a 1/4" -20 bolt will work just as good. If you ever have to change water pumps it a easy swap also without worrying about the studs. Just me though.

Rufas · 10-30-2019, 09:14 PM

Quote:

Originally Posted by Harold Holbrook

Thanks, I need to find out if a AC truck had a spacer. If id did I would need 2 1/2 inch studs. Fine threads 5/16 on the stop end that goes into the pump, 5/16 and medium that goes by the clutch fan.

Factory AC fan clutch does not use a spacer. AutoZone has a 36 piece water pump stud kit for $8.49.

Dorman- Help Water Pump Stud Assortment 36 Piece

**Stocker** · 10-30-2019, 11:50 PM

Quote:

Originally Posted by Andy4639

I'm curious of why you want the studs when a 1/4" -20 bolt will work just as good. If you ever have to change water pumps it a easy swap also without worrying about the studs. Just me though.

A disclaimer -- mine has bolts -- I didn't know about studs until a recent thread here.

It can be a bit of a juggling act getting the bolts, especially the first one, through the fan clutch (with fan attached), then through the pulley, and finally threaded into the water pump flange. Everything is flopping around, there's not much room to work, and the WP flange rotates away from what you thought was a perfect alignment.

With studs, you just slip the pulley on, then the fan clutch flange. Easy peasy. Next time I have mine apart, it's gonna get studs.

Harold Holbrook · 10-31-2019, 07:00 AM

Thanks, I think with an AC truck with a clutch fan it should not have a spacer. and I will by the studs .

Andy4639 · 10-31-2019, 10:00 AM

Quote:

Originally Posted by Stocker

A disclaimer -- mine has bolts -- I didn't know about studs until a recent thread here.

It can be a bit of a juggling act getting the bolts, especially the first one, through the fan clutch (with fan attached), then through the pulley, and finally threaded into the water pump flange. Everything is flopping around, there's not much room to work, and the WP flange rotates away from what you thought was a perfect alignment.

With studs, you just slip the pulley on, then the fan clutch flange. Easy peasy. Next time I have mine apart, it's gonna get studs.

I have had them a part before and yes some times it's a real job getting them started. But I have also had them go right on. The studs though most times will be thrown away with the pump and they are also a pain to install the first time.
I guess it's whatever you like to go with.

10-29-2019, 07:05 PM	#1
Harold Holbrook Registered User Join Date: Dec 2017 Location: Garden City , NY Posts: 490	Water pump studs I need the long studs for my 1971 chevy blazer 350 with A/C . The ones that hold on the clutch fan, spacer . and pulley to the water pump. I would like to have new , but good used ones will do. Thanks

10-30-2019, 07:01 AM	#3
Harold Holbrook Registered User Join Date: Dec 2017 Location: Garden City , NY Posts: 490	Re: Water pump studs Thanks

10-30-2019, 11:41 AM	#5
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,535	Re: Water pump studs You can also buy those water pump studs at auto parts stores. I believe the OE ones are fine thread on one end and medium thread on the other end. At least all mine have been. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

10-30-2019, 04:08 PM	#6
Harold Holbrook Registered User Join Date: Dec 2017 Location: Garden City , NY Posts: 490	Re: Water pump studs Thanks, I need to find out if a AC truck had a spacer. If id did I would need 2 1/2 inch studs. Fine threads 5/16 on the stop end that goes into the pump, 5/16 and medium that goes by the clutch fan.

10-30-2019, 09:06 PM	#9
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: Water pump studs I'm curious of why you want the studs when a 1/4" -20 bolt will work just as good. If you ever have to change water pumps it a easy swap also without worrying about the studs. Just me though. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

10-31-2019, 07:00 AM	#12
Harold Holbrook Registered User Join Date: Dec 2017 Location: Garden City , NY Posts: 490	Re: Water pump studs Thanks, I think with an AC truck with a clutch fan it should not have a spacer. and I will by the studs .



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