Solve an argument for me. - PeachParts Mercedes-Benz Forum

psaboic · #1 07-16-2013, 09:25 PM

Well, I appreciate the responses. Like you said, it looks like we are both partially correct. So, in my 83 300D, will hot coolant flow through the heater hoses but not the heater core itself if the heater itself is not turned on? I'm wondering, as I know several people that use WVO use a flat plate heat exchanger and plumb it into the heater hoses. Are they not getting hot coolant through the heat exchanger if the heater is off??

thanks,

Glenn

ROLLGUY · #2 07-16-2013, 09:42 PM

Quote:

Originally Posted by psaboic

Well, I appreciate the responses. Like you said, it looks like we are both partially correct. So, in my 83 300D, will hot coolant flow through the heater hoses but not the heater core itself if the heater itself is not turned on? I'm wondering, as I know several people that use WVO use a flat plate heat exchanger and plumb it into the heater hoses. Are they not getting hot coolant through the heat exchanger if the heater is off??

thanks,

Glenn

MB vehicles- (specifically 123)- When A/C/ cold is selected (temp wheel) the mono valve is energized and keeps coolant from flowing through the heater core. Air is flowing past both the evaporator and heater core when the blower is running. The vacuum operated flaps direct the air to the desired location (except when a pod is faulty).

Phillytwotank · #3 07-16-2013, 10:42 PM

Quote:

Originally Posted by psaboic

Are they not getting hot coolant through the heat exchanger if the heater is off??

Yes they would be getting flow regardless of the in cabin heat being on or off. Most common spot to tap in would be a T in the hose that runs over the oil filter housing near #5 cylinder.