water pump plug - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mtdave2 · 08-10-2002, 02:23 PM

can anyone exsplain the bypass thing in a water pump. new water pumps come with a metal dowl thing to plug the bypass.. i never have used the thing.. whats the deal

*Zkast* · 08-10-2002, 02:29 PM

Metal dowl? If its a basic GM long pump, they come with a NPT pipe plug to block off the heater return if the vehicle is equipt with a radiator heater return. I've found the systems with a waterpump heater return are more effecient and heat the coolant faster than the style that use the radiator as the heater return.

jostrans68 · 08-10-2002, 02:47 PM

some corvettes had a bypass tio the intake

mtdave2 · 08-11-2002, 12:25 AM

YA A METAL DOWL THING.. PIECE OF ROD METAL, ABOUT 1 1/2 INCHES LONG, 1/4 INCH WIDE. THIS HAS CONFUSED THE HELL OUT OF ME FOR YEARS. IM NOT TALKING ABOUT THE PIPE PLUG.

*Zkast* · 08-11-2002, 10:45 AM

Hmmm doesn't sound familiar...
Can you take a pic of it so we can see what your talking about?
Generally most GM aftermarket or new pumps come with a Clamp, Pipe plug and gaskets. Occasionally they will supply you with the 4 studs and sealer.

THOR 50 · 08-11-2002, 08:16 PM

does it have a slot in the top for a flat head screw driver?

jmil1974 · 03-29-2003, 07:41 PM

I've got one of these too. I'll see if I can get a pic.

08-10-2002, 02:23 PM	#1
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,528	water pump plug can anyone exsplain the bypass thing in a water pump. new water pumps come with a metal dowl thing to plug the bypass.. i never have used the thing.. whats the deal __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

08-10-2002, 02:47 PM	#3
jostrans68 Jostrans68 Join Date: Mar 2001 Location: Bloomington indiana Posts: 1,182	some corvettes had a bypass tio the intake __________________ [CGTW Member former 67-72 now with a 96 silverado

08-11-2002, 12:25 AM	#4
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,528	YA A METAL DOWL THING.. PIECE OF ROD METAL, ABOUT 1 1/2 INCHES LONG, 1/4 INCH WIDE. THIS HAS CONFUSED THE HELL OUT OF ME FOR YEARS. IM NOT TALKING ABOUT THE PIPE PLUG. __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

08-11-2002, 08:16 PM	#6
THOR 50 Over worked under paid Join Date: May 2001 Location: Fort Myers, Florida Posts: 378	possible idea more info. does it have a slot in the top for a flat head screw driver? __________________ Roger '69 C-10 with GMC front clip billet grill, 283CI, 400TH and 12bolt posiw/3.73 gears

03-29-2003, 07:41 PM	#7
jmil1974 Ain't we cute? Join Date: May 2002 Location: Friendswood, TX Posts: 700	I've got one of these too. I'll see if I can get a pic. __________________ 69 C10 2WD LWB Fleet 350/350 power front disc conversion (6 lug disc kit from gmcpauls) and new engine, PS, A/C, fresh fluids, SHE DRIVES! FOR SALE $3900

08-10-2002, 02:29 PM	#2
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	Metal dowl? If its a basic GM long pump, they come with a NPT pipe plug to block off the heater return if the vehicle is equipt with a radiator heater return. I've found the systems with a waterpump heater return are more effecient and heat the coolant faster than the style that use the radiator as the heater return.

08-11-2002, 10:45 AM	#5
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	Hmmm doesn't sound familiar... Can you take a pic of it so we can see what your talking about? Generally most GM aftermarket or new pumps come with a Clamp, Pipe plug and gaskets. Occasionally they will supply you with the 4 studs and sealer.



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