Water pump question on BBC - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71Rat · 11-22-2007, 08:34 PM

I was wondering if a Long Water Pump would work on a BBC with 72 style mounts on our trucks? I figured shorts came with the truck but i was wondering if i would run into clearance problems with a long pump.

Thanks for any input
71rat

**kwmech** · 11-22-2007, 10:35 PM

electric fans.

**FRENCHBLUE72** · 11-22-2007, 10:43 PM

Im running a lwp but have yet to get to the cooling part of the equation..

1LIME69 · 11-22-2007, 10:44 PM

I dont think it will. I have a bbc with a long water pump in my 69 with the tubular motor mounts and I have shifted the engine back 1 in and I barely have enough room for my electric fan.

**clay68c10** · 11-23-2007, 12:16 AM

I re-sold a serpentine belt setup since it put the wp hub too close to the radiator. I would have had to pull the rad to get the pulley off.

71Rat · 11-23-2007, 06:10 AM

thanks everyone for the input

dwaite72lnghrn · 11-23-2007, 06:15 AM

You will have about 2 3/4" of space between the pully and the rad.
I can't find a electric with less than 2 3/4" depth. I have a 16" flex fan and 2 electric in front pushing. 12" and a 14" fan in front of the air-condenser. In traffic it starts to climb to about 220 degrees. If the outside temp are in the 60's it will stay below 210. I am thinking of maybe side drafting electrics on angles and blow on the inner fenders. The 2 3/4 is the water pump pulley, the air conditioner compressor sticks out further.

*Ozona* · 11-23-2007, 09:20 AM

LWP will not work on a big block truck with the mounts in the bbc position.

You shouldn't have any overheating problems with a 4 core and a dual electric fans with a SWP. If you do, something isn't right.

I have a 509" with a 4 core $200 radiator in it, and a derale dual electric fan. 180 degrees...period.

I have an auxillary cooler for my trans, trans loop is Trans->Auxillary->Radiator-> External Filter-> Trans. If you have a built trans going into the radiator first...it will get too hot.

hope this helps.

Olden Days · 11-23-2007, 12:41 PM

Long water pump on BB in stock location does fit on mine. I come up with the same measurment as dwaite72lnghrn. I just went searching for a clutch fan that was the right length and found one that leaves the fan about 3/4 inches clearence from rad. I dont like it that close though and there is a little overheating issues when using ac in slow traffic. I plan on changing to electric fans. You likely wont find an electric fan that would have the clearance to sit in the middle of the rad, but using 2 side by side will work and that is my plan when I get around to it.

**FRENCHBLUE72** · 11-23-2007, 12:59 PM

Wes at classic heartbeat has a sweet dual fan set-up that I have been eyeing for this project..

chevy72blu · 11-23-2007, 01:45 PM

Anyone have any idea what the difference will be in rad clearance between a SWP and LWP? I have a 5600 cfm flexalite dual electric setup that just wont quite clear with my Edelbrock victor series LWP.

11-22-2007, 08:34 PM	#1
71Rat ran out of money Join Date: Apr 2003 Location: northern, NJ Posts: 925	Water pump question on BBC I was wondering if a Long Water Pump would work on a BBC with 72 style mounts on our trucks? I figured shorts came with the truck but i was wondering if i would run into clearance problems with a long pump. Thanks for any input 71rat __________________ Modify everything, leave nothing alone!~

11-22-2007, 10:35 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,499	Re: Water pump question on BBC electric fans.

11-22-2007, 10:43 PM	#3
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	Re: Water pump question on BBC Im running a lwp but have yet to get to the cooling part of the equation.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

11-22-2007, 10:44 PM	#4
1LIME69 Registered User Join Date: Nov 2006 Location: Alexis, NC Posts: 182	Re: Water pump question on BBC I dont think it will. I have a bbc with a long water pump in my 69 with the tubular motor mounts and I have shifted the engine back 1 in and I barely have enough room for my electric fan.

11-23-2007, 12:16 AM	#5
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,935	Re: Water pump question on BBC I re-sold a serpentine belt setup since it put the wp hub too close to the radiator. I would have had to pull the rad to get the pulley off. __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

11-23-2007, 06:10 AM	#6
71Rat ran out of money Join Date: Apr 2003 Location: northern, NJ Posts: 925	Re: Water pump question on BBC thanks everyone for the input __________________ Modify everything, leave nothing alone!~

11-23-2007, 06:15 AM	#7
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Re: Water pump question on BBC You will have about 2 3/4" of space between the pully and the rad. I can't find a electric with less than 2 3/4" depth. I have a 16" flex fan and 2 electric in front pushing. 12" and a 14" fan in front of the air-condenser. In traffic it starts to climb to about 220 degrees. If the outside temp are in the 60's it will stay below 210. I am thinking of maybe side drafting electrics on angles and blow on the inner fenders. The 2 3/4 is the water pump pulley, the air conditioner compressor sticks out further. Attached Images __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne Last edited by dwaite72lnghrn; 11-23-2007 at 06:21 AM. Reason: additions.

11-23-2007, 09:20 AM	#8
Ozona Account Suspended Join Date: Jan 2006 Location: Fort Worth Posts: 155	Re: Water pump question on BBC LWP will not work on a big block truck with the mounts in the bbc position. You shouldn't have any overheating problems with a 4 core and a dual electric fans with a SWP. If you do, something isn't right. I have a 509" with a 4 core $200 radiator in it, and a derale dual electric fan. 180 degrees...period. I have an auxillary cooler for my trans, trans loop is Trans->Auxillary->Radiator-> External Filter-> Trans. If you have a built trans going into the radiator first...it will get too hot. hope this helps. Last edited by Ozona; 11-23-2007 at 09:21 AM.

11-23-2007, 12:41 PM	#9
Olden Days Living In The Past Join Date: Nov 2003 Location: Rockies Posts: 709	Re: Water pump question on BBC Long water pump on BB in stock location does fit on mine. I come up with the same measurment as dwaite72lnghrn. I just went searching for a clutch fan that was the right length and found one that leaves the fan about 3/4 inches clearence from rad. I dont like it that close though and there is a little overheating issues when using ac in slow traffic. I plan on changing to electric fans. You likely wont find an electric fan that would have the clearance to sit in the middle of the rad, but using 2 side by side will work and that is my plan when I get around to it.

11-23-2007, 12:59 PM	#10
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	Re: Water pump question on BBC Wes at classic heartbeat has a sweet dual fan set-up that I have been eyeing for this project.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

11-23-2007, 01:45 PM	#11
chevy72blu Registered User Join Date: Apr 2004 Location: Las Vegas, NV Posts: 2,188	Re: Water pump question on BBC Anyone have any idea what the difference will be in rad clearance between a SWP and LWP? I have a 5600 cfm flexalite dual electric setup that just wont quite clear with my Edelbrock victor series LWP. __________________ RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e



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