H2O Sending Unit

[cvra]

Where is the best place to put water temp sending unit to get the most accurate reading?

[500BOMBER]

Beside the thermostat housing.

[dirty white boy]

in the head is where youll get best reading what i always herd...

[stockcar5]

in the head will usually run 10 degrees hotter than the t-stat housing.

[dynoman14]

While you are at it put in a water pressure gauge so you can tell when you have good temp at the sender but water is starting to drain out of the system. It only takes a couple laps under pressure for a race engine to push out all the water and burn out.

This has saved me 20+ engines over 30 years of racing.