Yes and a stuck-open thermostat causes the engine to take a long time to reach normal running temperature and in the case of an HDi, likely never. This is not good for the health of the engine generally and not good for occupants in the winter as the heater can be rubbish.
Too-cool running can cause condensation and corrosion in the sump and on a petrol, a rich mixture long after it's needed for starting and cold running. It's like running a carb engine with the choke pulled out... On a petrol it can also cause a big build-up of 'mayo' (emulsified oil) in the breathers and cam boxes.
2.0 HDI Xantia passed its MOT at last!
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Re: 2.0 HDI Xantia passed its MOT at last!
Jim
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
Runner, cyclist, time triallist, duathlete, Citroen AX fan and the CCC Citroenian 'From A to Z' Columnist...
Re: 2.0 HDI Xantia passed its MOT at last!
I thought they were designed to fail in the open position to avoid engine damage?
Xantia SX 1.9TD Gone to the breakers
Xantia LX 2.0HDI Taxed and MOT'd at last!
Xantia 1.8 16V SX On loan to brother-in-law
Sportrack off road toy
Series One Land Rover
Thundercat race boat
Xantia LX 2.0HDI Taxed and MOT'd at last!
Xantia 1.8 16V SX On loan to brother-in-law
Sportrack off road toy
Series One Land Rover
Thundercat race boat
Re: 2.0 HDI Xantia passed its MOT at last!
i have seen thermostats which have just given up the will to openStepto1 wrote:I thought they were designed to fail in the open position to avoid engine damage?
regards malcolm