97 Legacy Brighton Wagon, 2.2 liter, non-turbo, 5 speed manual, 290,000 miles

Temperature gauge will climb if let engine idle more than 1 minute or so (once engine is at normal operating temp).  The temp gauge needle will drop back to normal if hold revs at a higher speed.  No tach but I would estimate like 2500 rpm.  If you drive the car normally and don't stop and idle the temp gauge is rock solid just below half way (as it always has read).  You don't have to move to bring the gauge down - just hold engine at elevated revs.

 

Edited August 24, 20187 yr by Mike V

Check the coolant level in the radiator when cold.

I"d pull the front timing side cover and check the condition of the Timing belt.  If questionable I'd pull the timing covers so you can check the gears and water pump.

How the Heat in the car?  Do you feel the air temp changing?

It could be a blocked heater core or a dodgy thermostat.

Or worst case, something to do with the water pump, especially if it's one of those pressed metal impeller units. 

Are you running good quality coolant too?

Cheers

Bennie

Bypass the heater core and see how it does.    You didn't mention the electric fans I assume they are functioning normally ?