Q-compadres, How are your collective views on using coolant system sealers (e.g. Bars Leaks) to fix a 'sweating' heater core? Car in question is an '87 90q (first of the type 89/B3) and I don't fancy doing the fabled 8-hour dash-out operation... no A/C in this car, BTW. If no-one replies, I'll repost in Jan... TIA, Tom