I have a 1985 300td and the heater has begun to work intermittently. When driving on the highway it will blow hot air for a while and then randomly start blowing frigid air.
I took out the monovalve and looked at it yesterday. The black material at the tip appeared to be torn. I'd love to replace it, but it's Christmas day (merry Christmas) and I'm leaving on a car trip in a few days. I'd really like to have heat before I go!
I was wondering, since the monovalve is a control valve, is there a way to rig the thing so that it constantly sends the coolant to the blower? Would that be idiotic?
I won't need AC for a while and if that could get me until I return from my trip, I would be so happy.
Anyway, let me know your opinions.