My wife has a 2018 Jeep Compass(2.4L) that she bought new, and since it was ~1 year old or so I've been occasionally smelling antifreeze when it's hot.
On a few trips to the dealership, I've mentioned this, and every time they claimed it passed a pressure test.
Back in the spring, it started throwing thermostat errors, and one of the things I initially did was top up the coolant, which at that point was really low in the expansion tank. I was pretty well convinced the thermostat was bad, but after looking at what was involved I basically said "Not doing it myself"(out of warranty at that point-she manages ~20K or better miles a year). She opted to have the dealer do it, and I once again mentioned the loss of coolant(it has to go somewhere, right?) and the smell. Once again, they claimed it passed a pressure test.
A few months later, I'm still periodically smelling antifreeze and it has once again dropped low. Since we have about 3K miles in a week coming up next month, I'd REALLY like to get to the bottom of this.
My mind is going two places. One is-does the expansion tank have a hairline that opens when hot, but might not otherwise show up in a cold test?
The second-I didn't watch them test it, but I'm guessing that they may have pressurized by removing the expansion tank cap. If that's the case, could it be the cap is faulty and simply missed?
I've added UV dyes before to catch oil and transmission fluid leaks. I'm wondering too if there's one I could use here(safely). I don't want to throw parts at it, but I'm almost inclined to just toss a new cap on it, or even completely replace the expansion tank. Any thoughts on where I could look?
On a few trips to the dealership, I've mentioned this, and every time they claimed it passed a pressure test.
Back in the spring, it started throwing thermostat errors, and one of the things I initially did was top up the coolant, which at that point was really low in the expansion tank. I was pretty well convinced the thermostat was bad, but after looking at what was involved I basically said "Not doing it myself"(out of warranty at that point-she manages ~20K or better miles a year). She opted to have the dealer do it, and I once again mentioned the loss of coolant(it has to go somewhere, right?) and the smell. Once again, they claimed it passed a pressure test.
A few months later, I'm still periodically smelling antifreeze and it has once again dropped low. Since we have about 3K miles in a week coming up next month, I'd REALLY like to get to the bottom of this.
My mind is going two places. One is-does the expansion tank have a hairline that opens when hot, but might not otherwise show up in a cold test?
The second-I didn't watch them test it, but I'm guessing that they may have pressurized by removing the expansion tank cap. If that's the case, could it be the cap is faulty and simply missed?
I've added UV dyes before to catch oil and transmission fluid leaks. I'm wondering too if there's one I could use here(safely). I don't want to throw parts at it, but I'm almost inclined to just toss a new cap on it, or even completely replace the expansion tank. Any thoughts on where I could look?