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Old 01-21-2014, 12:43 AM   #1
CCCC
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Radiator Question

I have 2 or 3 radiators (for these trucks) of unknown workability - suspect that each has a leak problem - but have little experience with radiator issues and don't know whether it is worth trying to diagnose/repair them.

Is there any rule of thumb here - which problem aspects are feasible to fix and which problems say "junk it"? Any quick home tests - or need I take them the 120 miles to a rad shop?

Any instructions/suggestions will be appreciated.
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67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison
Moved but still in the family
70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350
Recently sent to new homes
72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp
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Old 01-21-2014, 01:13 AM   #2
Z10
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Re: Radiator Question

Here's another alternative. New drop in 2 core radiator for about $225 delivered. I bought mine on ebay. You'll see it in my build thread.
http://www.speedcooling.com/Radiator...r/prod_38.html
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Old 01-21-2014, 02:46 AM   #3
oldschool18
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Re: Radiator Question

find out who close to you is paying the most in scrap and get a jump start on a new one.
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Old 01-21-2014, 11:10 AM   #4
LockDoc
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Re: Radiator Question

-
If you can find something to plug the bottom outlet with you can fill it with water. That will tell you if it has any major problems. It won't tell you what it will do under pressure but if it passes this test any leaks it would have under pressure should be a pretty easy fix. I use a plug like in the link below, available at most hardware and automotive stores.

http://www.summitracing.com/parts/rn...FWJo7AodsggAUA

It is called an expandable plug.

LockDoc
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Old 01-22-2014, 12:35 AM   #5
CCCC
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Re: Radiator Question

Thanks LockDoc, for the tip. I have seen those plugs used elsewhere and will get one - at least will enable me to do the no-pressure test for leaks.

I may wind up scrapping these three, but there a lot of trucks around here so I should check them out before i give up on them. A re-seal job I had done down one side of a core quite a few years ago for $40 is still working fine - so there may be hope.

Thanks again.
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67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison
Moved but still in the family
70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350
Recently sent to new homes
72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp
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Old 01-22-2014, 01:08 AM   #6
LockDoc
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Re: Radiator Question

Quote:
Originally Posted by CCCC View Post
Thanks LockDoc, for the tip. I have seen those plugs used elsewhere and will get one - at least will enable me to do the no-pressure test for leaks.

I may wind up scrapping these three, but there a lot of trucks around here so I should check them out before i give up on them. A re-seal job I had done down one side of a core quite a few years ago for $40 is still working fine - so there may be hope.

Thanks again.

No problem. I save them all, especially the 4 core ones.

LockDoc
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http://67-72chevytrucks.com/vboard/s...d.php?t=829820

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