I am looking at the B17a block, and on the back I am not sure exactly which sensors are which. I will do my best to reveal them, but I am not totally sure on which is which. Please, if you know, tell me. I have arrows pointing to the various sensors, with them numbered.



1. Knock Sensor
2. ?
3. Oil Pressure sensor
4. ECT sensor?

 

that pic isn't showing up for me.

here is a pic of mine though:
Full Size Pic

the black 1 wire sensor near the deck of the block is the knock sensor. in ths pic its covered by the coolant hoses.

the small black 1 wire sensor near the middle of the block is the "Oil Pressure Switch"

The green plug near the middle of the block is the "Oil Temperature Switch"

The brown plug on the thermostat housing is the "Engine Coolant Temperature Switch"