I've been "sort of" following this thread but hadn't had anything to add. But now that attention has been paid to the thermal timer it triggered a recollection I had of diagnosing the cold start valve not functioning. The TT screws into a brass fitting in the block. Remove the TT from the fitting and clean the threads thoroughly -- now remove the brass fitting and clean its threads thoroughly. Years ago when I worked at a Volvo "Indy" shop and saw these models on a regular basis I found on more than one occasion a poor ground at that spot to be the problem. -- Dave
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