Backflush

I finaly had to replace the radiator several years ago, but have not back-flushed the system in many, many years. Perhaps this weekend is the time. I'll find my shop manual for this car and look for the valve you mention.

If I ever had to R&R the heater core, I'd probably get rid of the car; the entire dash has to be removed, etc, etc. Really is a nice car though. Thanks.