My 95 Legacy EJ22, with 195k, is losing coolant. About a cup or two each month. I use a bottle of 50/50 Prestone every 6 months or so.
I've driven it all over the place, from SLC to LA, up Pacific Coast Highway, and never worried once about it. Well, I need to make a 300 mile run on Tuesday and made the mistake of letting my old man borrow my car (the EJ25 in his Outback just blew a head gasket last week). He says he smells coolant and he worries I shouldn't drive my car until I get it fixed.
I typically smell the sweet smell after I punch it really hard on the freeway (3500-4500 RPM), and then exit, pull over, and stop. I smell it all over the place, including inside, outside, and strongly from the rear of the car (but not the exhaust).
No interior leaks. No "film" on the windows when I run the defroster, so I'm pretty sure that even though I can occasionally get strong whiffs of coolant, my heater core is fine. Heater works proud and strong.
I wash the engine regularly and I do see build up (likely coolant, although it's very dirty) on the driver's side of the engine around the plugs and below all the way down.
Is this an external head gasket leak? Valve cover leak? Freeze plugs? How serious is it? I've driven with the problem for over a year (20,000 miles) but I don't want to take this car on a long trip if it's a time bomb.
I'll post some pictures in a minute.
Thanks in advance!