Hello,
How can the heater control do anything to water flow? Just wondering as most cars I have had including the current one (1999 model) only controls the flaps that pipe the air to different places. I have never known an actual pipe to come from the engine through a tap (dashboard heater control?) and into the heater matrix before. If you flush the system out, the water will still flow no matter what the controls are set to.
In message , J A Sims
> writes
> >
> >
> >Hi there. I would like some advice on completely changing the
> >coolant on my 1989 Polo Coupe 1.3. Currently the stuff in
> >the system is a nasty rust brown colour, probably hasnt ever
> >been changed.
> >
> >What procedure would you take to do it properly.
> >
> Make sure its cold. Set the heater control to hot (this makes sure the
> coolant that's in the heater matrix gets changed). Undo the bottom hose
> to the radiator. Unscrew the header tank cap to speed things up. >
> Refit bottom hose and refill slowly with correct mix of
> water/anti-freeze. Squeeze the radiator hoses vigorously to help get rid
> of air locks. Run the engine (again with heater set to hot) for a few
> minutes. Stop and check level. Check for leaks and check level over the
> next few days to make sure it's stable.
>
> --
> Paul Giverin
>
> British Jet Engine Website
>
formatting link