Thread Size Question
Some good info in that thread, check post #21. Not sure if that's correct or not, but it's a start.
What are you trying to do?
Check that thread out.

There is a plug on the passenger side head you can use for it too. Since both heads are identical, it will be on the opposite side. This way you won't have to mess with your factory sensor.
That is why I am trying to find the thread size...
There is also a Engine coolant drain plug on the driver's side of the block that could be used... According to the guy at my local dealership...

