Quote:
Originally Posted by ah-kay
Why don't you unplug the monovalve, put 12v to the aux pump, leave the pump on and take the car to the freeway. If you have heat then may be the CCU is turning it off somehow, may be a sensor is faulty. If you do not have heat then it may be the coolant temp.
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If you do power the aux pump independently, make sure you get the polarity correct otherwise the pump will run backwards.
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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
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