Over heating diesel

[T-Cut]

You have the classic signs of a failed thermostat. Unlike the early opening problem the diesel stats became infamous for, they can also fail to open. It's the way it goes. If the wax capsule is compromised, the very strong valve return spring will ensure it stays shut, no matter how hot it gets.
I'd suggets you read through this a few times: https://www.the75andztclub.co.uk/for...ght=thermostat
- - get out your tool box out and watch the weather forcast on BBC1. You'll need at least a good day's sunshine to fix it. Remember to buy a new o-ring that seals the metai coolant rail to the stat housing. I believe these are separate parts from the thermostat housing kit and is also available from Rimmer Bros, forum traders and eBay.
Good luck.
TC

[SD1too]

Originally Posted by dingdong1960

...demist test ?

Hi Chris,

The "demist test" is a quick and straightforward way of finding out if your radiator fan slow speed has failed. A forum search using that term will reveal all.

Originally Posted by dingdong1960

... temp gauge rises to half way and stays there ...

Unfortunately the temperature gauge is unhelpful since it will display "normal" both when the engine is running too cold and overheating. Use the instrument pack diagnostics (test no. 7.0) to find out the actual coolant temperature. This will also help diagnose any fan problems as your low speed should start running at 100˚C.

Simon

[COLVERT]

Originally Posted by dingdong1960

Hello there ..thanks all for helpful replies ..Arctic ...demist test ????think i had done approx 10-15 miles ..its all hills around here !!! ..diesel tourer i had previously was exact opposite ..ran really cold til i did thermostat in top hose trick ...temp gauge rises to half way and stays there til i up a bl**dy hill !! i then have to put heater on full to help cool it ..fan comes on ok ..also starts rattling too ( water pump impeller ?)...its not losing or using coolant ..nearest 75 guy cant look at it til mid june ..

99% as T-Cut says.--Thermostat.

Bubbles as the water boils make a noise. --( Re. Your electric kettle.- )
At the sea side the noise you hear as the waves break on the shore come from the bubbles formed as the waves break.

Not a lot of folk know that.---

[Arctic]

Originally Posted by COLVERT

99% as T-Cut says.--Thermostat.

Bubbles as the water boils make a noise. --( Re. Your electric kettle.- )
At the sea side the noise you hear as the waves break on the shore come from the bubbles formed as the waves break.

Michael Caine does

[dingdong1960]

Thanks all ..got 2 days free..guess where i will be !!
Hey im a poet and i didnt know it !!!

[COLVERT]

Originally Posted by dingdong1960

Thanks all ..got 2 days free. Guess where I will be !!
Hey I'm a poet and I didn't know it !!!

YIKES !!!---Don't give up your day job.---

[COLVERT]

Originally Posted by Arctic

Michael Caine does

I know. He forced me to tell him.---