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View Full Version : D19 - S40/V40 to 2004 - Temp reading


ph5172
Jan 5th, 2008, 20:20
I have a 102bhp 2002 T4 engine, my temp guage reads just a tad below the 3 o clock position. my MPG has dropped to about 40
Question is does anyone know how to test my thermostat, i know if it was at the 4 o clock it probably would be but how do you know for sure.

many thanks

JIM C
Jan 5th, 2008, 20:23
Take the thermostat out of the car. Put it in a pan on the cooker filled with water and see if it opens and closes depending on the water temp.

ph5172
Jan 5th, 2008, 20:31
Simple really should have thought of that!!!

Where abouts is the thermostat located and i assume i will have to drain the coolant first.

A quick one, what temp should the thermostat open ?

JIM C
Jan 5th, 2008, 20:35
At a guess I would expect it to open at 87/90 degrees C.
If you follow the radiator top hose to the engine block that should take you to the thermostat housing.
You will not have to drain the cooling system.