Is there an oring or something that is supposed to go on this fitting? I had to put a new radiator on this weekend and I have a small leak at the DS fitting. I was able to tighten it a little but I found a small oring under the truck. I didn't notice any when I took the fittings loose.

 

Bump anyone know the answer?

 

I don't, did it stop leaking? What's the rest of the fitting look like? Usually if it's got a ferrel fitting or flanged press fit or NPT threads O rings are not part of the plan.

 

So I'm not sure about the radiator side of it, and can't remember if you have a hand shaker or slush box, but when i disconnected the ZF6 cooling lines there were orings in the transmission fitting side that the tubing flange would press against in there

 

So Wesley wins. I was being really dumb. I had the old one I could have just looked at! Here are pics. Looks like an o ring in there to me. I'll message with it when I get a chance.

 

Also looks like Wesley and I have similar trucks. Tan/Black

 

Okies rule

 

Anybody have the specs on these o-rings. Just bought an '05 F250 with the ZF6 and I've got a nasty leak on the lines right at the radiator and it's looking like it may be a bad o ring. Don't really want to replace the lines if an o-ring will fix the issue.

Thanks

 

I am currently running without an o ring in one side. I found the o ring laying on the ground but never put it in. I tightened the fitting and it stopped leaking. Sorry I do not have the specs.