Re: few question about the bmw535i E39

> >thanks for your kind help. just found some coolant lost on the floor
> >near the rear of the engine. there is NO water in the oil. and i have
> >tested the car with the heater and aircon off, then there is no leak.
> >lt only leak when the heater and aircon is turned on. looks like
> >somethiing to do with the heater pump? there is no coolant inside the
> >car. i would have to top up the bottle about 1/3 after 200 miles
> >highway drive ( with heater on). what coud be the problems? where is
> >the heater pump located ( heater core) located? is it easy to replace?
> 
> I do not believe there is a seperate heater pump.  The heater core is
> under the dash and is difficult to replace.  Check the hoses carefully
> and hope you have a bad hose.

The parts CD shows an electric auxilliary water pump, it's built into
the heater valve assembly. My E38 730i V8 has the same thing and I had
to replace it with a used one from ebay.

Cars with the latent heat store option have an additional pump as well,
a second electric pump.

-- 
Who needs a life when you've got Unix? :-)   
Email: john@[EMAIL PROTECTED]
 John G.Burns B.Eng, Bonny Scotland
Web  : http://www.unixnerd.demon.co.uk
- The Ultimate BMW Homepage!
Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html
www.Strathspey.co.uk - Quality Binoculars at a Sensible price