Quote:
Originally Posted by azitizz
I have a bizzare phenomenon happening in the cab heating system. (85-300TD W123)
I have the radiator covered for the winter to keep things warmer in our winter months (especially with a veg-oil system). When I am driving on a highway and get to just over 100km/hr (60mph) or so the heat stops coming out of the vents and the engine temp rises fairly quickly. The fan continues to blow however.
|
So the engine's working hard, can't get airflow due to the cardboard and the temp increases? Sounds normal to me.
If the underhood "outside" temp sensor also gets hot due to the lack of air under the hood it may shut off the monovalve to prevent the coolant from overheating the "hot" outside air coming into the air intake.
Quote:
Originally Posted by azitizz
I have to decelerate to less than 80KM/hr (50mph) in order for it to switch back to blowing hot air and decrease the engine temp. Would there be a particular flap in question that can be oiled or something?
I could also use more heat period. I cant seem to gte a nice heat coming out and when the car is idling its almost cold. I need to bring up th rpms to get heat pumping through better. Any ideas?
Thanks
|
Is your Aux Pump connected? It's supposed to pump coolant through system at idle. I'd recommend the 1 A fuse mod first, if it's not currently plugged in.
However, the same phenomenom may be occurring at idle: the underhood temps go up due to the lack of airflow, the CCU closes the monovalve since the outside air is already "hot".
I recommend you simply unplug the electrical connector on the monovalve and see what happens. If it doesn't get electricity it stays open in the "full coolant through the heater core" mode. This assumes it was/is intact, not gunked into position by crud, not torn, etc.