Coolant Reservoir issue

[Spearmin]

So I noticed on warmer days I've been smelling coolant burning hitting something hot. So I assumed It was my coolant reservoir. Visual inspection showed that the coolant reservoir was empty. I went to put coolant back in to refill it and, I could hear the coolant coming out and hitting something hot and steaming. I went ahead and ordered a replacement metal coolant reservoir and proceeded with putting it in. Before I put it in I wanted to test the existing plastic stock reservoir. I filled it with water in the sink and it held water without a problem. Tested this several times held water No leaks. I remember when I was taking it off the coupler underneath Had a bunch of gunk around it. I cleaned the gunk off. It was like pinkish Gunk. Instead of putting the new reservoir in, I put the old one back in and filled it back up with coolant, and it has held today. Granted today is not really a warm day. It's only 60° or less. So my question here is, did just my cleaning off the gunk fix this issue. I'm looking to send the replacement reservoir back because the other one doesn't have a leak yet. Or is it the hot day issue and the leak is going to come back as soon as it warms up? Anybody else had this issue?

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[croppz]

So what can happen is the seams of the tank can separate when really hot and then once it cool down it “welds” itself back together.

It’s possible the fitting is bad as well if you had gunk around it. Is this on a 2.0? If you need a new 90 degree coupler I have a spare I can send you (if you’re in the US) so you don’t have to buy the entire hose from mopar. Just need to reuse your metal spring for it. I would keep the spare tank just in case

 

[Spearmin]

So what can happen is the seams of the tank can separate when really hot and then once it cool down it “welds” itself back together.

It’s possible the fitting is bad as well if you had gunk around it. Is this on a 2.0? If you need a new 90 degree coupler I have a spare I can send you (if you’re in the US) so you don’t have to buy the entire hose from mopar. Just need to reuse your metal spring for it. I would keep the spare tank just in case

Thanks I will keep you in mind. Something is telling to hold of on everything until the next hot day. I don't even know when that will be.

 

[croppz]

Thanks I will keep you in mind. Something is telling to hold of on everything until the next hot day. I don't even know when that will be.

The aluminum tank is honestly the way to go. I went with a mishimoto tank and an aluminum heater hose tee because I just didn’t wanna deal with it going forward

 

[dmaxw]

Yep, same as croppz. Got rid of the plastic fittings in the hose line to the tank, put in Mishimoto aluminum tank, and replaced the T on top of the engine. One and done, don’t need to wonder or carry spares for road/trail side repairs.

 

[croppz]

Yep, same as croppz. Got rid of the plastic fittings in the hose line to the tank, put in Mishimoto aluminum tank, and replaced the T on top of the engine. One and done, don’t need to wonder or carry spares for road/trail side repairs.

Which fittings did you use on the hose leading to the tank?

 

[dmaxw]

Which fittings did you use on the hose leading to the tank?

I cut the bung fitting off the tank and tapped it for 1/2 NPT, threaded in a 90 elbow 1/2 NPT x 3/4” hose barb. Mishimoto should offer that as an option to eliminate the plastic 90 bung fitting. I turned the Y that is ahead of that on my lathe. 3/4” end towards tank, and 5/8” for the other 2 ends. Straight piece of 3/4” heater hose between tank and the Y, instead of the weird factory 3/4”x5/8” reducer hose.

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