Well the Renix years XJ's and MJ's had that damn plastic expansion B.S. it started being a every couple of years replacement needed until I decided to look for a metal one. I guess that scared the last one into not cracking on my 90XJ.
Only when towing…I’ve watched this closely for a while, I think it’s the fitting on the tank end of the hose that is causing the dribble leak. Ordering a new hose to see if that stops the leak. You can see it coming out of the top of the hose connection, almost like it getting past the oring in the end of the tank connection. Or is it just a sloppy plastic connection with that shit wire retainer clip? Have not had it apart yet, is there an oring at the end of that fitting? OMG who thought up that kind of a connection point in a pressurized coolant system?
OAT coolant that meets specs. I got mine at Fleetfarm. Other stores carry OAT coolant. Don't use anything else!
Also, I agree poor design. You may be able to just loosen the hose clamp on the new piece and only swap out the fitting instead of having to replace the entire hose to the front of the engine. That was my plan at least, until I discovered that weep hole and suspect cap.
Thanks. I know they're very specific about coolant types.
There's a risk that if you mix types, they can gel in the cooling system, plugging the radiator and so on with "goo" Slimer would be proud of.
Thanks for info, pictures and thorough description. Very helpful.I was out this past weekend in the dirt pushing the truck, but I didn’t think that hard. Ambient temperature was mid 70s, in 4hi through some single track desert trail. Coolant temps hovered between 200F and 220F. Don’t remember trans and oil temps but nothing concerning. When we got to our destination I smelled coolant and realized it was leaking from the bottom of the reservoir near the fitting. The coolant was also bubbling in the reservoir (). No check engine lights or warnings.
Returning back to camp I babied it and kept engine about 190F. No more coolant loss. I drove it home the next morning 300 miles keeping it under 200F on the highway and side streets with no coolant loss or bubbling.
I bought a new elbow fitting (actually entire hose assembly because Jeep doesn’t just sell the fitting) and new reservoir w/cap (these are on back order and very hard to get). I disassembled the coolant bottle from the fitting to find the bottle was fine and the fitting wasn’t cracked.
Here’s the interesting part. There’s a weep hole near the threaded portion of the bottle where cap screws in and goes down to the bottom of the bottle. This would make it appear as if the fitting was cracked, when in reality, if coolant was making it past the cap it would leak from under the bottle. Needless to say, I just installed a new cap and reinstalled the old bottle on the old elbow fitting because I didn’t want to introduce more variables and other parts looked fine. Not sure if this logic makes sense but if the cap is not holding the correct pressure (21psi) I would get the boiling over in the reservoir sooner. I haven’t had a chance to run it up to 220F and test my theory or if the cap fixed it yet, but I am curious what others think?
Also, could this little weep hole be a reason for coolant loss over a long period of time, evaporation? Also, could this be why some think the fitting is cracked underneath the bottle when actually it isn’t?
Thanks,
Mike
I didn’t see anything coming out of that spot, but your right about under hood wind. This weep hole thing is beyond my understanding. So like a pressure pop off valve that weeps coolant down and outside of a coolant hose? What pressure is the weep hole set at? The coolants boiling point is 265 degrees? So that system design is a f’ing tea pot? Unbelievable.Yes, there’s an o-ring inside the elbow fitting. Hard to tell from your pictures, but is that coolant residue under the overflow hole in the bracket? Also, fluid can do funny things in an engine bay with the wind/fan.
My jeep is having the same issues then started constant overheating I replaced multiple hoses. Nothing seems to do the job. I am having to fill up tons of coolant a few times a week. I’ve already tested the head gaskets it’s just getting to be ridiculous. I don’t know what else to do I guess I’ll try testing the cap. So annoyingI was out this past weekend in the dirt pushing the truck, but I didn’t think that hard. Ambient temperature was mid 70s, in 4hi through some single track desert trail. Coolant temps hovered between 200F and 220F. Don’t remember trans and oil temps but nothing concerning. When we got to our destination I smelled coolant and realized it was leaking from the bottom of the reservoir near the fitting. The coolant was also bubbling in the reservoir (). No check engine lights or warnings.
Returning back to camp I babied it and kept engine about 190F. No more coolant loss. I drove it home the next morning 300 miles keeping it under 200F on the highway and side streets with no coolant loss or bubbling.
I bought a new elbow fitting (actually entire hose assembly because Jeep doesn’t just sell the fitting) and new reservoir w/cap (these are on back order and very hard to get). I disassembled the coolant bottle from the fitting to find the bottle was fine and the fitting wasn’t cracked.
Here’s the interesting part. There’s a weep hole near the threaded portion of the bottle where cap screws in and goes down to the bottom of the bottle. This would make it appear as if the fitting was cracked, when in reality, if coolant was making it past the cap it would leak from under the bottle. Needless to say, I just installed a new cap and reinstalled the old bottle on the old elbow fitting because I didn’t want to introduce more variables and other parts looked fine. Not sure if this logic makes sense but if the cap is not holding the correct pressure (21psi) I would get the boiling over in the reservoir sooner. I haven’t had a chance to run it up to 220F and test my theory or if the cap fixed it yet, but I am curious what others think?
Also, could this little weep hole be a reason for coolant loss over a long period of time, evaporation? Also, could this be why some think the fitting is cracked underneath the bottle when actually it isn’t?
Thanks,
Mike
