Benhogan, Thanks. I did bypass the heater core, luckily for me, I do live in one of the hotttest areas in California where it rains maybe 5 or 6 days out of the year. I would like to remedy this at some point. I was able to pinpoint the leak, it is coming from the metal pipe that connects to the heater core. Is there a gasket or o-ring in there? it seems fairly accessible from driver side and held in by 2 bolts which I was able to remove, however getting enough wiggle room to disconnect the pipe from the core is another story as I do not know how far the metal pipe goes into the heater core. Any advise would be greatly appreciated. Thank you all for your replies and help!

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1990 190E 3.0L