Temperature Gauge off the scale

[fontayne56]

I have pulled my cavalier 1.7 TD out the garage and getting it back on the road. I left it running on the drive the or about 5 mins and I found the temperature gauge over full other side of the red. I popped the bonnet and the engine was still cool.

I have ordered a new temperature sensor but where is it on the vehicle.

What else can i check.

Many Thanks

[Robsey]

I have never worked on a TD, but would assume that the gauge temperature sensor will be fitted somewhere on the thermostat casing.

On petrol cavaliers, it is a small round sensor with a single female spade / lucar connector on it. Looking at parts images, it should be the same for the diesel.
This is for the gauge...

[fontayne56]

GREAT I'll Take a look !! !!

[fontayne56]

Found it !! thanks !! right hand side of the engine but theres 2 .. im guessing the one with the spade connector as its the same part i have ordered.

[Robsey]

Yep - the single wire connector.

If it has two wires, chances are it is for the engine ecu.

[Robsey]

If it is off the gauge,
I got to thinking if the wire or insulation was damaged.
Just can't remember if it is a broken wire or a short to earth that would give a full deflection of the needle.

Never really known an analogue (needle) temperature gauge to show a noticeably wrong value - they have always been within 5 to 10 degrees of the "expected" value.