Hello everyone,
I need a little help again. I'm trying to diagnose my heat problem, I have very little heat. The engine temperature is normal and I can't see any tears in my monovalve diaphram. I would like to bypass it just to be sure that I haven't missed a tear. My problem is that there are 3 hoses going to/from the heater core. 2 from the monovalve and 1 to the block (return) I am wondering if you could explain what the deal is with the 2 "incoming" hoses?
Thanks
Corey

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1982 300sd
1980 300cd (sold)