It might be worth checking the grounding of the gauge and the wiring? I had a very similar issue with my new to me 110, the needle on the gauge would go right up into the red looking like it was overheating, but actually the issue seemed to be the lack of earth to the gauge. Not sure how it would've been originally but definitely seemed to sort out my issue adding in a new earth wire to the bulkhead.

The sensors are basically thermistors, and the gauge reads the resistance compared to ground (no resistance). So if its reading higher than you expect there could be more resistance somewhere in the system, potentially due to a bad connection or something like that.
 
And a brand new black sensor....this is where it went!
 

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and whats the actual temperature? if the dial doesnt match the sensor then it will give a false reading
 
Why don't you buy aftermarket gauge with sensor and put it in the top hose?
Or capillary gauge if you know what the thread in the housing is.
Saves buying endless sensors which are not compatible.
Have you tried earth on the gauge which someone previously suggested?
By the way even if you do find a sensor which seems to work you still need to check temperature independently to make sure it is correct.
We have fitted two gauges on the 200tdi.
 
Thanks. The gauge is a pukka LR one from Brookfields. My chum is taking the front end off on monday to check the wiring an fitting an earthing wire. Meanwhile I will drive around without looking at the Temp gauge.... Have checked the top hose and it is not overheating.......fingers crossed!
 
Nickincabin said:
And a brand new black sensor....this is where it went!
Click to expand...
That is exactly what my temp gauge looked like with the earth issue! Very quickly up into the red, when in reality the engine wasn't even up to temp at that point as someone had removed the thermostat :rolleyes: I knew right from the start mine wasn't actually overheating as I checked with an infrared thermometer.

If you have the capability I would take the gauge out and test it externally, eg supply it with 12V and connect to one of the sensors you have that is supposed to be the right temp range for the engine and see what it reads in known temperature water, say 80-90c
 
Just drove for over an hour down here in Devon. Needle way past the red🤣stopped once to check the overhead pipe: nearly cold, on arrival checked again pipe hot but not past hand touch...pal stripping out the front end to check wiring and fitting an earthing wire monday....will report back then 🤞
 
Nickincabin said:
Just drove for over an hour down here in Devon. Needle way past the red🤣stopped once to check the overhead pipe: nearly cold, on arrival checked again pipe hot but not past hand touch...pal stripping out the front end to check wiring and fitting an earthing wire monday....will report back then 🤞
Click to expand...
Overhead pipe?
 
The pipe from radiator....not a true petrol head tp use the right words: the one that if overheating would be pressurised and hard to squeeze🤣
 
Can you confirm that you have a good ground on the back of the gauge itself?

Stock 300tdi setup is this little black wire with a daisy chain of eyelets on it. If the eyelets are loose (on either the temp gauge OR the gauge where it's grounded onward) you will get the gauge go intermittently high.
 
julianf said:
Can you confirm that you have a good ground on the back of the gauge itself?

Stock 300tdi setup is this little black wire with a daisy chain of eyelets on it. If the eyelets are loose (on either the temp gauge OR the gauge where it's grounded onward) you will get the gauge go intermittently high.
Click to expand...
Crikey. Thanks, will brief my pal ref this on monday.....its defo not overheating per se🤣
 
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