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Old 05-28-2007, 01:23 PM
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Plastic pipe for radiator plumbing?

OK heres why. I am building a 46 Chevy COE hauler and due to space considerations under the VERY small hood I intend to relocate the radiator back behind the cab and beneath the bed. I am using a stock 4 core GM pickup (mid 80's vintage) radiator and running a 454 and T400. Now, the crazy thought I had was to use plastic (like PVC or CPVC) to plumb the cooling lines from the engine to the radiator. Ease of installation would be the reason to entertain the idea and I don't expect operating pressure to be a problem as the cooling system pressure should not exceed 20 lbs give or take. Temperature on the other hand I am not sure of. The thermostat on the engine will, barring any problems, regulate the coolant temp at 195 but I'm not sure if these plastics will hold up to this.
Your expert thoughts and opinions will be greatly appreciated. Oh yeah, and my feelings won't be hurt if you call me crazy, its happened before!

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Old 05-28-2007, 02:45 PM
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The other people that I've seen do this kind of thing (mid-engine SBC to a front mounted radiator in Corvairs) have all used copper. I think I'd feel better about using copper tube too.
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Old 05-28-2007, 07:37 PM
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no way can you use pvc ,cpvc would be able to handle the temp. but won't look so great copper is a better choice as it can be soldered neatly and buffed to a nice lustre
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Old 05-28-2007, 08:11 PM
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Do they make aluminum electrical conduit in large enough diameter? Could be bent or short sections w/rubber connections where needed and sanded or polished.
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Old 05-28-2007, 09:58 PM
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i have used exhaust pipe for routing water w/o problems in the past & was still a little leery about it, UNTIL I read on one of the other boards I belong to that several others have used the same piece for over 10yrs w/o any problems. Don't buy the cheap stuff, use at least an aluminum coated pipe or stainless.

&&&&&&&& like MAUSS said you could use copper & I believe it's willys36 that used copper on his project, look on page 8 then 7 to see what he did.....joe
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Old 05-28-2007, 10:01 PM
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I have seen exhaust tubing used for long cooling hose runs also. Saw an old truck street rod once with a buick engine under the bed that used exhaust tubing and it was chrome plated!

gcrmcc
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Old 05-28-2007, 10:09 PM
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Cboy used copper on his last low budget rod.



http://www.hotrodders.com/forum/jour...ge=5&reverse=1

I think that will take you to the correct page.
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Old 05-31-2007, 04:31 AM
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Copper was my first thought and will most likely be what I use. Just had the plastic idea and wondered if anyone else might have tried it or given it any thought. Thanks for the response though.
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