I dunno ... you figure it's a 20 year old Ford consumer grade car ? (Fifteen years is about the max here in the Northeast.)
If it's going out of service in the next year or two it wouldn't be a sin to see if he could get away with air conditioning system stop leak.
Of course .... if he's being a real horse's necktie you could tell him about it AFTER he replaced the evaporator core.









Bookmarks