Temp gauge goes to top, red light flashes, but radiator doesn't steam and fan doesn't come on. Oil temp rises slowly. Takes about 5 miles of urban driving from cold start.
Started cold and allowed to idle. Took about 15 minutes for gauge to hit top and red light to flash. Oil temp between 80 and 100C.
I'd removed the radiator cap before starting. Based on how a cold thermostat blocks water from radiator to coolant pump, I thought the coolant level might rise in the radiator and perhaps flow out the filler, but coolant level did not noticeably change (I did not leave the cap off while warming up).
After shutting off the engine, I jiggled the connector to the fan. The fan started. Wondering "loose connection?" I started the engine again. The fan shut off. I shut down the engine again. This time I pushed a fan blade a little. Fan started and ran for a very short time. Runs strong, with the usual sound, and turns easily when cold.
I did not suspect the fan because the temp still rose even when driving at
40mph.Coolant pump pulley is turning, pump has never made noticeable noise. No leaks.
Venture a diagnosis, anyone?
thx, nf