Hello fellow Volvo lovers :)
I'm new to the forum, having recently acquired a 1989 740 Turbo (w/ about 170K miles), and am having some problems with what I hope is NOT the heater core. Unfortunately, the car has been exhibiting some of the telltale signs of a heater core leak (ie: mist from the air vents, fogged windows, leak under passenger console) and, earlier today, the heater stopped...well....heating. My question is: How can you differentiate between a control valve leak and an actual heater core leak? If the leak is in the heater core, is there any "temporary fix" for it, to just get some heat into the cabin without having to rip the console apart just yet? I've heard mixed reviews of some of the commercial "stop leak" agents...Would it be advised that I try one of these, or would it not do any good, considering the heater has already stopped blowing hot air?
You'll have to excuse me if my questions seem extremely novice, but, although I am pretty good at diagnosing what's wrong with a car, I lack the experience to actually attempt to fix something like this myself (especially since I'm a girl. lol). Anyway...Any help or advice is greatly appreciated. thanks in advance!