Hey all… a question for the experts. My truck’s (‘98 3.0/auto/rwd) cooling system was leaking from multiple places, so I used a cap tester/leak down kit to find them. One of the points is here, where the fitting for one of the transmission cooler lines threads into the radiator side tank:



So what the hell do I do about this? Appreciate any insight.

 

how bad is it leaking? trans oil and coolant

 

Just coolant, no trans fluid that I can see. The pressure test turned up leaks in a few places, and this is by far the least bad. I’d never even noticed any leaking there before, say after a drive. But these things do tend to get worse, maybe especially after I plug all the other leaks…

i’m kind of wondering if I could just reseal that bigger hex fitting where it threads into the tank. I would just unscrew it and see, but I’d like to make sure before I do something I can’t undo.

 

not sure, I'd ck to see if would unscrew, im guessing its not. if you have a junkyard you could ck one out to see if it comes out, ive used JB Weld on radiators before and it held for years.