Heater core Flush

[max123]

Couple of questions.  My interior heat is getting weak and after an entire winter of suffering I've got to the point where I need to get this done (just in time for summer of course).

Anyway, I have recently flushed out the cooling system, but it didn't do anything to help my heating problem.  As such, a more robust response is called for.  So here are my questions.

First, can I just flush the heater core by unhooking both of the hoses going through the firewall to the heater core, and hooking up a garden hose to one and letting it run.  Second, will I damage the control valve by reverse flushing it?  Third, there is a good Pelican Parts article on cleaning out the E36 heater core control valve - is this the same for the E30, and does anyone have any first hand experience here (i.e. how do I get the valve off without making a mess on my carpets?)

[monty23psk]

I can help you with what I know.

If you did a coolant flush, did you have the heater valve open? If so, it will flush the heater core. Your car must have the key turned to give electricity to the valve.

Flushing the core is just find and dont believe the path of water matters. Of course the valve should be open.

Not sure if the teh e36 and e30 are the same. Can't help there. Confirm by checking part numbers.