I suspect that my coolant reservoir cap is bad as my
        overflow tank (Bentley calls it a "refill tank" pg. 19.13)
        is always dry, even when the engine is warm/hot.  Do you
        guys actually SEE the level of coolant going up and down in
        the overflow (secondary) tank as the engine heats up??
        Thanks,  Malcolm

I do...  and if I refill my expansion tank to the maximum when Fritz is
cold, it overflows after I shut down the motor due to the subsequent
expansion.  Nice color.  But even after the overflow, I still can see at
least a skim in the bottom of the expansion tank when the motor's cold.

-=Chris=-
85 GL Fritz