oil cooler line o-ring size?

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willxfs

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Anyone know the correct size o-ring for the oil cooler lines that fit into the radiator? I changed my radiator out a few weeks ago and apparently lost the o-ring for the upper oil cooler line. Have a slow leak now. My rig is a 1998 2 door, 4wd. Thanks for any info.
 

SunlitComet

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0.426 inner diameter but i don't know the outer diameter or ring thickness. I am sure that if you find one similar you will likely stop the leak. dealers sell them too.
 
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willxfs

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Thanks for the info. I'll look around today and see if I can find something close. Sounds like ID should be about 7/16 or 11 mm.
 

99Vortec

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What is the torque on those damn lines? When I swapped out my radiator, I had to use an 18" Crescent wrench and was only then barely able to break the original connection.

Had to tighten them massively after replacement.

*Edit* So you have confirmed that you have lost the o ring?

I had trouble initially with the upper oil cooler line leaking. Interestingly enough, it did not appear until after a few weeks worth of driving.

I ended up having to remove the radiator shroud upper assembly first, then the lower and torque the line hard...
 
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willxfs

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Yeah, I definitely lost the oring. I bought one from a hardware store and all is good now. The oil line fittings in the radiator weren't torqued that much when I removed them, nor did I tighten them back as much as you. I just put them good and tight.
 

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