housing sensors confusion

[James1975 2]

which sensors go into which thread at the back of the coolant housing? i forgot, there is a longer sensor and short sensor.

 

did these originally have a sealing washer on each?

Edited June 22, 2023 by James1975

[welshpug 1,622]

they are both 14x1.25 with a taper seat, the only coolant sensor that has a washer is the 12x1.5  threaded blue 2 pin unit for the ecu.

[James1975 2]

Thank you for the reply

 

its the coolant temp gauge sensor and i believe the other is a warning temp light

 

i have been looking online and found the longer one sits closest to the head and shorter next to it

[Phil Gti 8]

It just so happens I had to take my coolant housing off last week and I took a photo with the sensors still in it and one with the wires connected. 

This should help you.

[James1975 2]

Yep thats how i put them back, funny thou i have seen pics that show the other way round,

 

i guess they seem to work like that as well, thank you for taking the time to post up some pics.

[Tom Fenton 1,525]

Think about it, both are going into the water jacket, it doesn't matter which goes where so long as the correct wire goes to the correct one.