e60 coolant not getting to heater core
04-30-2012, 09:26 AM
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Hi guys, im still stuck with this no heat issue in my 06 525xi automatic, but i think i have narrowed it down to the point of it being beyond my knowledge,LOL. I removed the water valve tested it and it works, i also back flushed the core, so i know its fine, or think rather. Lastly i know the aux pump works because when doing the bleed procedure you can hear it pushing the coolant around. So, what i have narrowed it down to is that there is no hot coolant getting to the heater valve, or heater core. I let the car warm right up where the fan begins spinning, and held the in hose to the water valve, and the out hose from the heater core, and there both cold. I can pinch them with my hand no problem. My car was in an accident and radiator along with hoses ect were replaced. But the car doesnt overheat.. :S? im thinking that the supply plastic which connects to the upper rad hose and is a t to the watervalve inlet hose is blocked or something causing no water to flow? Reason being is that that is where the hot coolant enters the the hose going towards the watervalve.
04-30-2012, 09:42 PM
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My Ride: 545I and a half dozen other rides
well if there is a auxiliary water pump for the heater and it is working then I would check the water valves to see if they are opening and whether they are getting the signal to open.
05-01-2012, 11:46 AM
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Look at the parts pictures for the heater core and associated hoses. There is a water value that controls water flowing into the heater core. Could be simply disconnected or could be broken. I've had broken ones on two previous cars in my lifetime. Results in no heat. You can even test it easily by putting a piece of rigid tubing (with clamps) to bypass the value and see if you get heat. That was the permanent fix from my old Pontiac 
05-09-2012, 04:35 PM
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Look at the parts pictures for the heater core and associated hoses. There is a water value that controls water flowing into the heater core. Could be simply disconnected or could be broken. I've had broken ones on two previous cars in my lifetime. Results in no heat. You can even test it easily by putting a piece of rigid tubing (with clamps) to bypass the value and see if you get heat. That was the permanent fix from my old Pontiac
WHERE IS IT PLEASE TELL ME I THINK THATS THE PROBLEM!
