2 Groove Water Pump Pulley - The 1947 - Present Chevrolet & GMC Truck Message Board Network

clemsonteg · 02-20-2015, 04:42 PM

I have been on the lookout for a 2 groove water pump pulley for a future conversion to AC. I haven't had much luck finding a factory pulley. I found this one on fleebay http://pages.ebay.com/link/?nav=item...d=390662151388 but I'm not sure if I should trust it. Has anyone purchased this one or one like it? I don't care for the chrome, but I figured I could paint it.

clemsonteg · 02-25-2015, 11:46 PM

Also, it looks like my current pulley is 7" and several of they pulleys I am finding are 6.25-6.5. Will the smaller pulley size be a problem?

clemsonteg · 02-26-2015, 11:26 AM

Here is a photo of my current setup. I think I have something a little goofy going on with my power steering. I am hoping that I can replace the first crank pulley with a double setup along with the water pump pulley and keep the 2 outside pulleys so I can use the outermost one for my power steering. I am not really sure what's up with the spare groove or why it lines up the way it does.

72MARIO · 02-26-2015, 01:54 PM

Just a heads up there is a small and large 4 bolt pattern on that pulley.

clemsonteg · 02-26-2015, 02:28 PM

Quote:

Originally Posted by 72MARIO

Just a heads up there is a small and large 4 bolt pattern on that pulley.

Thanks. I believe I measured it at 1.75" and I believe that is the small 4 bolt pattern. I think the large 4 bolt pattern is 2.25", right?

Andy4639 · 02-26-2015, 03:28 PM

My old setup on the 305 TPI motor. Had all the 71 chevy truck pulleys on it though. Just for reference for you.

EARNHARDT#3 · 02-26-2015, 03:37 PM

Quote:

Originally Posted by 72MARIO

Just a heads up there is a small and large 4 bolt pattern on that pulley.

I found that out the hard way! Luckily all I did was redrilled the correct holes between the other holes. Worked out fine and the way it gets sandwiched there's no need to worry about losing strength.

5567Cruiser · 02-26-2015, 03:42 PM

I have a Weiand water pump on my 350 engine and it is drilled for both bolt patterns. I gave up looking for a OEM 2 groover and used a Mr. Gasket 2 groove but it is chrome. Anyway one solution to consider.

clemsonteg · 02-26-2015, 05:09 PM

Quote:

Originally Posted by 5567Cruiser

I have a Weiand water pump on my 350 engine and it is drilled for both bolt patterns. I gave up looking for a OEM 2 groover and used a Mr. Gasket 2 groove but it is chrome. Anyway one solution to consider.

Thanks. I found some aftermarket black ones, but aftermarket parts are always hit or miss. I am trying to find some factory ones. I think I found the part numbers I need based off some searching.

Crank Pulley - 3744043
Water Pump Pulley - 3995646

I found a few other people that seem to be using that combo with some success. I plan to search around the interweb some more this evening. Plus I am curious to see what I have at home with my current setup.

I think I also figured out that the reason I have a spare space on my add-on pulley is because I have a power steering pump and pulley combo that would have been used in conjunction with an air pump for smog. If I reuse that pulley I will end up a total of 4 grooves on my crank with 3 in use.

Andy4639 · 02-26-2015, 06:58 PM

The chrome pulleys are know for slipping. I tried for several months when I first did the 305 to run chrome pulleys. I thought I wasn't getting the belts tight enough and it all fixed itself when I put all the stock pulleys back on it.

clemsonteg · 02-26-2015, 09:09 PM

Quote:

Originally Posted by Andy4639

The chrome pulleys are know for slipping. I tried for several months when I first did the 305 to run chrome pulleys. I thought I wasn't getting the belts tight enough and it all fixed itself when I put all the stock pulleys back on it.

One of the many reasons I don't want a chrome one

Small correction to my post above, 2.125" and 1.75" should be the 2 water pump pulley bolt patterns. Upon further inspection I have the 2.125" pattern, which should correlate with the part numbers I listed earlier.

Sorry if some of this is repetitive. I search and research a lot and I like to put the answers out there for future people like me.

02-20-2015, 04:42 PM	#1
clemsonteg Registered User Join Date: Jul 2012 Location: Anderson,SC Posts: 953	2 Groove Water Pump Pulley I have been on the lookout for a 2 groove water pump pulley for a future conversion to AC. I haven't had much luck finding a factory pulley. I found this one on fleebay http://pages.ebay.com/link/?nav=item...d=390662151388 but I'm not sure if I should trust it. Has anyone purchased this one or one like it? I don't care for the chrome, but I figured I could paint it.

02-25-2015, 11:46 PM	#2
clemsonteg Registered User Join Date: Jul 2012 Location: Anderson,SC Posts: 953	Re: 2 Groove Water Pump Pulley Also, it looks like my current pulley is 7" and several of they pulleys I am finding are 6.25-6.5. Will the smaller pulley size be a problem?

02-26-2015, 01:54 PM	#4
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: 2 Groove Water Pump Pulley Just a heads up there is a small and large 4 bolt pattern on that pulley. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

02-26-2015, 03:28 PM	#6
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 2 Groove Water Pump Pulley My old setup on the 305 TPI motor. Had all the 71 chevy truck pulleys on it though. Just for reference for you. __________________ 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.

02-26-2015, 03:42 PM	#8
5567Cruiser Registered User Join Date: Jun 2011 Location: Cannon Falls,Minnesota Posts: 99	Re: 2 Groove Water Pump Pulley I have a Weiand water pump on my 350 engine and it is drilled for both bolt patterns. I gave up looking for a OEM 2 groover and used a Mr. Gasket 2 groove but it is chrome. Anyway one solution to consider. __________________ GARY 67 LWB CST FLEET 56 CHEV 3100 55 CHEV BEL AIR 2DR SEDAN 67 BUICK GS400 CONVERT

02-26-2015, 11:26 AM	#3
clemsonteg Registered User Join Date: Jul 2012 Location: Anderson,SC Posts: 953	Re: 2 Groove Water Pump Pulley Here is a photo of my current setup. I think I have something a little goofy going on with my power steering. I am hoping that I can replace the first crank pulley with a double setup along with the water pump pulley and keep the 2 outside pulleys so I can use the outermost one for my power steering. I am not really sure what's up with the spare groove or why it lines up the way it does. Attached Images

02-26-2015, 06:58 PM	#10
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 2 Groove Water Pump Pulley The chrome pulleys are know for slipping. I tried for several months when I first did the 305 to run chrome pulleys. I thought I wasn't getting the belts tight enough and it all fixed itself when I put all the stock pulleys back on it. __________________ 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.



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