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Comments, sounds like two problems (archive)
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Posted by Grant on September 16, 2001 at 10:43:37:

In Reply to: E23 84 735i - heating, air problem posted by Michael on September 15, 2001 at 19:01:36:


i have recently bought 10/83 German mnft Aus import 735i. The heating & aircond is not working and coolant has appeared in the passenger & drivers floorwell. I note two coolant hoses go thru firewall to HVAC presumably and maybe these are leaking? i notice the other contributors refer to a HVAC Schematic and was wondering if this would assist me in tracing the problem. all assistance appreciated. thanks.

I agree with Tom. It appears that your heater core or the pipes that lead to the heater core are leaking. This would explain the coolant inside the car. It also could be the hose connections to the heater core pipes. But prepare for the worse as it probably will be the heater core. It can be changed. You do not have to remove the dash. But it will take some work. I will send some photos for you to look at.

The other problems does sound like a HVAC control problem or a lack of vacuum to the system. That will require a diffent set of trouble shooting options.

But if you do decide to replace the heater core be sure to check all the solenoids and valves as you will have the HVAC covers off to get acess to the core.




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