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Post By Wbulk
03-23-2012, 06:22 PM
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CC Member
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Join Date: May 2003
Location: Hudson Valley NY,
NY
Cobra Make, Engine: Backdraft, 302, Tremec 3550. #038
Posts: 863
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Not Ranked
heater hose blank off cap
On cars without heaters, does anyone have a part number or what did you use to cap off the outlet for the heater off the water pump. Its for a small block.
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Kids in the backseats cause accidents, accidents in the backseat causes kids ! Good reason to get a Cobra !!!
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03-23-2012, 07:06 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
This was recently discussed at length. There are 2 options. There are rubber caps that can be installed on the outlets and held in place with a hose clamp, if the rubber bursts however you'll be parked. Another more reliable option is to remove the pressed in tubular nipple or cut off the cast one, and thread the remaining hole for a small tapered pipe plug. Chose the option that your abilities allow.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 03-23-2012 at 07:11 PM..
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03-23-2012, 07:35 PM
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Backdraft Racing Dealer
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Join Date: Dec 2004
Location: North Haven,
CT
Cobra Make, Engine: Backdraft Racing
Posts: 5,121
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Not Ranked
In the Help! section of Autozone called a Bypass cap. Though our preference is to remove it and tap and plug it. Some pumps you cannot do it though and will just destroy it. Another reason we try to use the Edelbrock pumps more often since they are thread in.
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03-24-2012, 05:10 AM
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CC Member
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Join Date: Mar 2007
Location: seekonk,
ma
Cobra Make, Engine: factory five mkIII roadster 445 fe quick fuel 750 q series,irs
Posts: 468
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Not Ranked
i found that if you take the end of the tube and crush it in a vise it will twist out with a pair of vise grips, they have some sort of sealant on the tube and it is just pressed in. you have to use a 1/2 npt tap then use a allen cap plug.
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03-24-2012, 07:46 AM
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CC Member
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Join Date: Jun 2005
Cobra Make, Engine:
Posts: 3,077
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Not Ranked
any concern about aluminium shavings damageing the water pump seal if you dont get all the particles out? take a piece of heater hose and put a bolt in the end and clamp down. Take other end and clamp to water pump. Not real pretty but works.
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03-24-2012, 08:07 AM
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CC Member
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Join Date: Mar 2007
Location: Creedmoor,
TX
Cobra Make, Engine: FFR3542K, 347 C. I., EFI, T-5, Miata Front Sway Bar, 3 Link, Red with White Stripes
Posts: 1,161
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Not Ranked
Mike Forte, a vendor here, has an aluminum plug you can use a short piece of heater hose to put it on the stock hose connection. The hose will last much longer than the rubber caps.
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Steve
Texas Cobra Club-Austin
July 2009 FFCars Picture of the Month
FFR3542K, 347, Holley Sniper EFI, T-5, 4 Wheel Discs, 3-Link, Miata Front Sway Bar, Red with White Stripes
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03-24-2012, 08:08 AM
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CC Member
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Join Date: Jun 2008
Location: Chester Springs,
PA
Cobra Make, Engine: Kirkham 289 FIA #690, FRPP 427 Boss engine
Posts: 764
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Not Ranked
Some people make the mistake of using a vacuum cap which later fails. These are made to block off a hot pressurized fitting:
Search Results for bypass cap - SummitRacing.com
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RCR GT40 SOLD to Fast 5
Kirkham #690 289 FIA
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04-22-2016, 05:15 PM
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CC Member
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Join Date: May 2005
Location: Wolcott,
NY
Cobra Make, Engine: CMC,Ford 302
Posts: 56
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Not Ranked
I just recently did this on a stock water pump. I removed the pump, got a piece of dowel that fit snugly and put in the tube. I then took a propane torch and heated the pump (not a lot) then I used vice grips and worked the tube until I could twist it out. Then I slathered a glob of grease on 1/2" pipe tap. I tapped the pump and pretty much all of the chips were held in the grease. I then cleaned up opening, took an air hose and blew it out. I wiped on liquid Permatex on plug threads and sealed it up.
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04-22-2016, 07:55 PM
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CC Member
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Join Date: May 2009
Location: American Fork,
Ut
Cobra Make, Engine: 66 Cobra
Posts: 930
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Not Ranked
I have used the rubber cap. They crack after a year or so. I now use a 1/2" oil passage plug. Sand the outside of the plug and inside of the water outlet. Smear both with JB weld and drive in. Works great.
http://
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Wayne
"Everything is alive. If you get angry at a vehicle or the trans, it won't fix until you apologize and say you are sorry." "The vehicle always knows what it is doing and what the cause of it's bad feeling is. If you ask it humbly what the problem is, it will tell you. Then you and it will both be happy."
Gil Younger
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