Hey all, recently i've had the timing belt changed along with the water pump and pulleys and tensioner on my 1.9TDI.

Whilst travelling down the motorway last night, i noticed the temperature gauge was at the bottom. Then after some time it started moving up and down, before settling at 90 degrees for a couple of minutes, before jumping up and down all the way.

I did notice this a few weeks ago, but its not happened since.

Anyway im suspecting its the temperature sensor, would i be correct in thinking that the temperature sensor is the one just under the fuel pump on the camshaft?

Or is that one of many?

Thanks in advance

Browny_37

Take it back to whoever fitted the pump, its either got an air lock in it or a prob with the pump. It might also be a stat problem like stuck open. More likely its related to the work done.

Take it back to whoever fitted the pump, its either got an air lock in it or a prob with the pump. It might also be a stat problem like stuck open. More likely its related to the work done.

Its behaved since though, i have noticed that sometimes on idle it revs up slightly. And looking around this forum i saw a post by boycarp mentioning this symptom.