In order to measure oil temperature, oil needs to flow over the sensor.
If you use one of the ports on the head (14 mm thread) you will not have flow. You can install an oil pressure sensor, but not a temp.
If you drill and tap into the oil pan extension (spacer) then you can get true temp at the sump.
I made a part that serves two purposes on my car.
I put a 2" hexagonal block of aluminum in series with my Direct Oil Feed oil line.
Into that block I drilled and tapped and installed my oil temperature sensor.
The two purposes: Measures oil temperature after the cooler and absolutely tells me that my IMS bearing is being lubricated (because I can read temp).
Happy Boxstering,
Pedro
Pedro Bonilla1998 Boxster 986 - 311,000+ miles:
[www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)
Racecar spelled backwards is Racecar
"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"
"If you wait, all that happens is that you get older"... Mario Andretti
"Being second is to be the first of the ones who lose" ... Ayrton Senna