Steve B. wrote:
> I also don't understand how you can do a
> decent flush of the evap and lines with the expansion valve still in
> place. How do you manage to get enougt fluid to back feed through the
> expansion valve to flush it all out?


You can't be successful flushing 100% of the time, but experience will
tell you if the cleaning process was or was not a success before
recharging the system. Every system poses it's own challenges related
to which lines and components need to be removed to facilitate
flushing. Expansion valves can be cleaned in place if the evaporator
has large enough tubing, or for several hours of extra labor in the
case of most smallish import cars, it can be removed and cleaned or
replaced if too crapped-up. An example of simplicity would be Chrysler
H blocks -- really easy to get to!

Toyota MDT in MO