C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Dewitts trouble/question

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Old Sep 5, 2008 | 07:17 PM
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Tom 35th anniversary's Avatar
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Default Dewitts trouble/question

Did any of you guys that have a Dewitts radiator have trouble getting the tranny lines to thread into the radiator? I can get it to start (about 1 thread) and then it gets really hard to turn very fast!!! The threads in the radiator fitting look like a match to the threads on the tranny line, but they dont feel like they will go together. I'm really afraid I'm gonna crossthread/or ruin the radiator side threads!!!!!!!
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Old Sep 5, 2008 | 07:44 PM
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Contact Dewitts and ask about the thread tightness.

Are you using a A8A:http://www.dewitts.com/pages/product...asp?ProdID=299

CORVETTE DIRECT FIT RADIATORS

Testimonials The term Direct Fit® gets thrown around a lot today. Many companies offer replacement radiators and most of them require some alterations, even when they claim they fit.
Our Direct Fit® radiators are designed to install into the stock mounting and use the factory connections without any modifications or adapters. That's why the U.S. Patent and Trademarks office has granted DIRECT FIT® as our offical trademark.
Each DIRECT FIT® radiator starts with a USA made core, furnace brazed in a force nitrogen furnace. Our cores feature two rows cooling tubes, serpentine fin and they are epoxy free. Press formed end tanks are manually tig welded by expert craftsmen, providing the ultimate in stregth and apperance. Many companies build Corvette radiators, only one specializes in it.
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Old Sep 5, 2008 | 08:08 PM
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Might need to chase the threads with a tap.
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Old Sep 5, 2008 | 08:14 PM
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Sounds like you already cross threaded them!
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Old Sep 5, 2008 | 09:36 PM
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Originally Posted by MK 82
Might need to chase the threads with a tap.
I ran a tap through them, ok now. I see that you have to have the lines perfectly perpindicular to the rad to get the threads started right!!!! What a pain in the a$$ with hard lines!!!!!
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Old Sep 6, 2008 | 01:46 AM
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Glad you got it. On every auto-rad connection like that I have ever worked with were the same way. Gotta have them flush and metal lines make it a b@#
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Old Sep 6, 2008 | 12:41 PM
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Originally Posted by Tom 35th anniversary
I ran a tap through them, ok now. I see that you have to have the lines perfectly perpindicular to the rad to get the threads started right!!!! What a pain in the a$$ with hard lines!!!!!
Yep.....just like a master cylinder, anything less than perpendicular and you have a cross thread on your hands....ask me how I know .

Glad you got it together !!

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