Monovalve meltdown ?
Well, after repairing my monovalve with a fast lane kit - 87 300SE euro (which has two plunger/pistons, not one ) I suddenly get constant heat coming out of the defrost vents.This is with the temp dials at minimum, and the blower off. Worst yet - there is a strong odor of hot plastic, as if something is ready to melt down or burn.
I checked under the hood and these new replacement plungers in the monovalve are very hot. Should they be ? anyone have this problem before ?