180, to 200.
Cracked block?
It should not
most likely an intake gasket
Measures the temperature of the water in your engine block, usually right where the water comes in from the radiator.
50-50 mix antifreeze...240 is as high as I'd want to go safely.
Assuming this is a 4.3 engine, remove the block coolant drain plugs. There is one on each side of the block. The passenger side is towards the front of the block and the drivers side is towards the back.
That is a by pass, so the water can transfer around the thermostat.
it's on the front of the engine block below the water pump
It is located behind the fan and mounted to the engine block with 4 bolts.
behind fan,bolted to front of engine block
180 to 195 degrees is normal.
Bottom right of the water pump. Dead center of the engine in the front.