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Need some help on fittings

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Old Jan 10, 2021 | 12:50 PM
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Default Need some help on fittings

Happy New year everyone!
I have a 1985 C4 base model with 209k on it and has new engine and trans. since it is a 1985 and has 209k I thought I would purchase a new radiator for it. The radiator is a direct fit except the transmission oil lines. It seems like the threads are different. I tried to identify what type of threads they are with no luck. Is there an adapter required? I attached pictures of the male and female fittings. Additionally there is a air pure valve and does not have a plug in it, picture attached also. Were can I obtain . Thanks for you help!!

Original trans oil cooler connection on radiator

New radiator oil connection and male tubing connector. Also air purge female with no threads
these? Thanks Art
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Old Jan 10, 2021 | 02:22 PM
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I would contact either manufacturer or vender for insight into required adapters.
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Old Jan 10, 2021 | 02:50 PM
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Should just be inverted flare,no?
And that barb sticking out is for low coolant temp sensor. When I got my aluminum radiator for my non stock 88 I had no clue what it was. Had to go to Napa and buy one just to plug it off....
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Old Jan 10, 2021 | 09:39 PM
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Your first try should be a 5/16 INV FLARE NUT. If the cooler is a duplication of OE that should certainly do Snapshot hints obvious INV FLARE.

A GM # 10054615 or after-market equivalent will work for the exposed nipple. Low coolant 'LEVEL' sensor. eBay search will get you an image.

Last edited by WVZR-1; Jan 10, 2021 at 10:09 PM.
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Old Jan 11, 2021 | 05:30 PM
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Thanks. I went out and bought the 5/16 inv flare nut and It did not work. the 5/16 flare nut is the same size as the OE on the 1985 corvette. It seems to need an adapter from 5/16 to the port on the radiator? I am not sure what size the Radiator port is. I tried to contact vendor but no response yet. Any suggestions?
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Old Jan 11, 2021 | 08:22 PM
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Originally Posted by agillings
Thanks. I went out and bought the 5/16 inv flare nut and It did not work. the 5/16 flare nut is the same size as the OE on the 1985 corvette. It seems to need an adapter from 5/16 to the port on the radiator? I am not sure what size the Radiator port is. I tried to contact vendor but no response yet. Any suggestions?

Radiator is 'in the car' OR 'in your hands'? Carry the radiator to a fitting/hydraulics shop and find out what fits! Brand and part # for the radiator?

Last edited by WVZR-1; Jan 11, 2021 at 08:23 PM.
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Old Jan 12, 2021 | 08:14 AM
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Yes in car, you are right I will remove it and bring it this weekend. It must be a common size. I red else were the people have experienced the same is but ther is no post for the solution
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Old Jan 12, 2021 | 08:30 AM
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Originally Posted by agillings
Yes in car, you are right I will remove it and bring it this weekend. It must be a common size. I red else were the people have experienced the same is but ther is no post for the solution
If you have thread pitch gages or access to them you could resolve it that way also I'd think. Is the cooler maybe a Metric thread? Difficult to tell without checking. You've NOT answered the question brand & part # so ..................

Last edited by WVZR-1; Jan 12, 2021 at 08:31 AM.
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