heater delete

[moots]

well,i finally got to bypas the heater matrix from the cooling system.we don't need heaters and it is basically another component that can induce leaks as has happened to the e34 when the heater sprang leaks due to corrosion.the symptom is sweet smell(coolant) and flooding under the dash.basically this is the route the coolant travels:1. from the rear of the engine block2. goes to the heater aux motor pump/vlv assy(lh strut tower)3. branches out via 2 separate hoses going to heater matrix(inside cabin,hidden in the depths of the dash board)4. comes out from heater and back to the engine block(metal T pipe under inlet manifold).what i did,i connect the hose that comes from the rear of the engine block (A)and route it direct to the metal T pipe(B) under the inlet manifold.This metal T pipe was where the return hose from the heater is connected to.the pics shows hoses and rubber caps in the bypased condition.effectively the ihka ops shud not be affected by this operation as the coolant is controlled by the aux water pump and the heater valve when the temps selection is done on the ihka panel.

 

[seewai]

I was recently recommended to do this operation too.
One thing to take note is that I do use the heater function to regulate the coolness when weather is cool (eg raining).
Once heater function removed, any other way to reduce the cooling power besides manually switching off the compressor?

 

[e39touring]

Isn't this required for the auto climate control?

 

[moots]

well,i really cannot say for sure,how the IHKA works,normally like jap cars by regulating the compressor on/off cycle or by introducing/mixing hot air to regulate the temperature.but before this delete,i do notice that the compressor does come on and off depending on the temps selected on the ihka control panel.

so far i have been driving for 2 weeks without any change in anything at all...all working normally.

 

[zib]

well,i really cannot say for sure,how the IHKA works,normally like jap cars by regulating the compressor on/off cycle or by introducing/mixing hot air to regulate the temperature.but before this delete,i do notice that the compressor does come on and off depending on the temps selected on the ihka control panel.

so far i have been driving for 2 weeks without any change in anything at all...all working normally.

Yes I once did this to my ex-Peugeot 406. The a/c became very cold and the only way to reduce this was to either turn off the a/c switch as cranking the temp regulator up would not reduce the blower temp as it used the mixture of hot/cold air to get the required temperature setting.

But BMWs maybe different tho.

cheers

 

[julianpang]

Yes I once did this to my ex-Peugeot 406. The a/c became very cold and the only way to reduce this was to either turn off the a/c switch as cranking the temp regulator up would not reduce the blower temp as it used the mixture of hot/cold air to get the required temperature setting.

But BMWs maybe different tho.

cheers

BMW is the same as Peugeot. I have an E34 with the heater deleted. Both the temperature dials dont work now. The moment you turn on the a/c fan, its max cold. You cannot regulate the temperature.

Mine was disabled coz the heater system had a leak and it caused problems. Decided to get it disabled permanently and less problem without the heater and no point spending money to get components to get heater system back to working order..

 

[YaZmEeN]

U can install the thermostat, which i did it in a cheaper way. The thermostat sensor will go thru the cooling coil and i can set the tempreature manually. But since the add on thermostat is unside the dash, i just pre set it to the middle.

 

[zib]

My 406 was disabled also due the a leak in the heater matrix. The water disappearing act got more chronic and it was traced to the heater matrix.
Similar symptoms such as wet front passenger footwell area and the foul smell of heater/coolant from the blower/ac unit.

 

[moots]

in essence,to bypass the heater,connect point A to B with the existing hose and you're done.