[Alpines] Over Heating

[philipreddy at fuse.net]

My series III has developed an over heating problem. I have owned the Alpine for 35 years and renew the antifreeze regularly and have never had this problem until this past year. There are no leaks, The radiator has been pressure and flow tested OK,the water pump checks OK, good flow in top tank, with or without the  thermostat installed.

I am looking for suggestions on how to proceed from here.

Phil Reddy