They were right - no loss of coolant, and engine temperatures were totally OK. I then did some much more significant test driving with the belly pan still off - up into the mountains 30-40 miles, at freeway speeds, and it happened to be a very hot day. They put it back up on the rack and found that pressure testing was OK, no sign of leakage. So I returned to the shop, leaving the belly pan at home temporarily. I was positive I had a new coolant leak - the car had been perfect up through the day before. I then took off the under-engine belly pan and saw lots of wet mess around the bottom edge of the radiator and hoses. The next day, there was a pink fluid spill on the garage floor of at least a few tablespoons. I drove home (<5 miles) and parked in the garage overnight. The mechanics did the job while I waited and I guess did a real rush job. The coolant was left for the end of the day, and hadn't been done yet when I arrived at the agreed pickup time. I had my coolant replaced, because it had reached 8 years age, by a recommended independent mechanic (along with some other more complicated work). But as an added oddball slight possibility, I'll mention an experience with my non-Subaru other car this past summer. I second all the comments that you may indeed have a serious coolant loss problem, and you should continue to carefully monitor levels in both the radiator (when it's cool) and overflow bottle. That doesn't mean you don't need to add coolant to the overflow. OTOH - It is possible although unlikely (since you can smell the "smoking gun"), that they replaced the coolant, and the loss of coolant so far is due to air being purged from the system during operation. In any case, if you get the classic "no trouble found" response, tell them the sales person told you that running the car with an empty overflow tank is fine so they can give him/her an appropriate slap before they provide more erroneous advice to someone else. This is a technique that may be employed by the service staff. The typical way to address "mystery coolant loss syndrome" (MCLS) is with a dye added to the coolant so that it lights up under UV that you can see even when the coolant disappears. Since you smell coolant, Black21Limitedcould well be right, and you won't see coolant if it's burned off/evaporated. The thing is it doesn't seem to go down when driving, only after sitting overnight.Īnyone else experience this? Any advice? First time Forester/Subaru owner here so I'm a bit in the dark.Ĭlick to expand.Any leak in the system will result in the missing coolant being pulled into the radiator from the overflow while cooling. I'm taking the vehicle up to the dealership to have them look at it tomorrow morning. There's a faint smell of coolant in the cabin when idling after a long drive and also from under the hood outside. I was hoping the level in the overflow would level off when I checked it this morning, but sadly no. Having to add so much coolant after only a few days with the vehicle doesn't seem normal. I filled it up to the FULL line, and this morning it was down to the LOW line. The next morning it was empty, so I put a bit more in (up to the LOW) line, and again the next morning (yesterday) it was empty. For peace of mind I went up and bought some Super coolant from the dealership and put some in the reservoir. I called up to the dealership and my salesman told me this was fine and is common in Subaru vehicles and actually advised me to not put any in the reservoir even though it was bone dry. When I picked it up and got home, I noticed the coolant overflow reservoir was empty. It had to be run through the shop for all the certified pre-owned work before I could take it home. I bought a 2019 Forester base a few days ago.
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