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how did you bypass your heater core?

Old 08-07-10, 06:57 AM
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how did you bypass your heater core?

I'm redoing my coolant system and I want to bypass my heat core until I get a new one. I know I will need a heater core to race (if I want to see )

Whatís the best way to do this? The radiator side is no problem (my new rad doesn't have nipple yet) but the block side is a large hose (3/4 or 1 inch ID?) and I do not want something that will fail.

Thank you for our input!
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Old 08-07-10, 12:01 PM
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you could just block it off, with some jb weld and large vac nipple. if you had the nipple on the radiator could just connect them.
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Old 08-07-10, 12:35 PM
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best way is a short length of hose with a metal plug in it. it works, and is totally reversible

or if the engine's apart you can pop the nipple out and thread the hole like the 81 and older engines.

we tried the plugs, and the silicon and all the other stuff, none of em last very long...
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Old 08-08-10, 12:42 PM
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+1 on the hose and bolt combo. I was running the Help hose nipple on the block outlet for a while. After blowing them out twice while on track and dumping all my coolant (not a good thing) I got a section of proper hose and a 3/4" bolt from Home Depot. Coat the bolt threads in RTV black, install in the hose with a clamp and let it cure. Then clamp it on the block outlet. I've been running it for two seasons w/o a problem.

Good luck,

-bill
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Old 08-24-10, 04:26 PM
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Plugs

So I found some plugs at Blowes. Both work really well off the car, you have to pretty much cut them out of the hose. I'll post how they do.



Attached Thumbnails how did you bypass your heater core?-img_2736.jpg   how did you bypass your heater core?-img_2737.jpg  
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Old 08-24-10, 04:30 PM
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those plugs look good!
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Old 08-25-10, 09:35 PM
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Those are nice. What section of Lowes did you find them in?

-bill
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Old 08-26-10, 06:22 AM
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Originally Posted by wrankin View Post
Those are nice. What section of Lowes did you find them in?

-bill
Plumming isle with the fittings and hoses. They were next to the copper pipe pieces.
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Old 08-26-10, 11:17 AM
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Originally Posted by Supercharged FC View Post
I know I will need a heater core to race (if I want to see )
Rag on a stick or a 12V fan. You don't need hot air to clear the windshield when it rains usually...
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Old 08-26-10, 11:35 AM
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Originally Posted by gkmccready View Post
Rag on a stick or a 12V fan. You don't need hot air to clear the windshield when it rains usually...
How about the factory fan? I mine blows hard...

I live in Michigan so winters mornings require heat, but this is a patch until I have cash to buy a nice new heater core.
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Old 08-26-10, 01:26 PM
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Dunno, I've driven race cars with no heater core or blower and the windshield can fog right up if the conditions are bad. With a blower alone it might be ok. Rain-x's anti-rain treatment is awesome but their interior anti-fog doesn't work so well.
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Old 08-26-10, 02:55 PM
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Originally Posted by Supercharged FC View Post
How about the factory fan? I mine blows hard...

I live in Michigan so winters mornings require heat, but this is a patch until I have cash to buy a nice new heater core.
Factory fan is great, just heavy. If this is a street car and you're even thinking about late fall, early spring some place even marginally cold you'll want a heater car, though...
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Old 08-27-10, 01:06 PM
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I had the block threaded and plugged, sealing the threads with super black RTV by the builder.

The radiator i used the hose/plug/doubleclamp method. But eventually i wanna get that thing cut and welded...
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Old 08-27-10, 01:42 PM
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Talking

cut the nipple off the block, take a beer bottle cap grind the ripply sides off so its flat and just says budlight on one side blank on the other. mix up some jb slap her on there
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Old 10-12-10, 11:29 PM
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I am thinking of using the heater core as a small radiator. The rear rotor sees less cooling than the front so this might help.

Also I am going to route the BOV air to the heater core (bov is on the cold side).
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