[harborman]

Originally Posted by LummoxPG

Thanks Harbor...bty I did order a new sensor and the attached image shows a small aluminium crush washer to be inserted ahead of the sensor...I wasn't sure if the part would come with one so went ahead and ordered one separately...just in case

There is a way to test that sensor with an Ohm meter. It is a variable resistor that is temperature sensitive so the resistance changes with engine temp. I am sure there is a write up on here or Rennlist.

Yes there might have been a compression ring to seal it. When I think of "O" ring I think of a rubber type. Take care in removing the connector as it may be a little brittle from heat.