while driving to the MOT the other (yes it finally passed!!!) I noticed some erratic behaviour of the temperature reading on the instrument cluster.
Temps were fluctuating going up to 82-82, then rapidly dropping a few degrees at a red light, the up again and down again and it went like that for a while. Driving home from the MOT temps were stedy at around 84-86 C.
On my previous Rover engined Elise this was a typical behaviour of the coolant sensor being on its way out.
How is it on the Turbo normally?
I know before I got the car Matt Bentley who was troubleshooting some issues replaced the coolant sensor, but replaced with a used one so not unlikely it is on its way out.
Where exactly is the temp sensor located on the turbo, and would someone have the parts number / point me to where I can get one. I have an Opel dealershop close to work so I could pop in and get an OEM one unless they are ludicriously expensive.
Any pointers for swapping it would be appreciated to. I will be doing the rad shortly so planned on swapping the sensor at the same time (given that is the usual remedy).