My 1998 V90 has been leaking coolant from the back of the engine block area, the leak has been getting progressively worse, and it leaks worse when the engine is warmed up. I checked the heater hoses (they've been replaced a couple of years ago, and seem in good condition) -- wrapped some paper towels about them and drove around -- the connections seem to be tight, with no leaks. I've come to suspect the metal pipe that connects the inlet (lower) hose to the engine block -- I can get to it by touch and there does seem to be some blackish-greenish stuff under it (a little hard to tell what it is since there's also oil from an oil leak above it --I'm working on fixing that one). It seems like I have excluded pretty much everything else that could leak in that area, but who knows, maybe I've missed something. The location of the thing seems to be the most inconvenient one... wonder if these things are known to leak... should I try to to get the metal pipe or its connector replaced? Not even sure how to get to it -- needs some oxygen sensor type socket probably... For the record, part numbers are 6842264 (coolant pipe nipple) and 3507438 (coolant pipe) (luckily, both still available). Here's a link to a page with parts diagram.
Thanks,
Vlad
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'98 965