I replaced my thermostat when the temperature guage suddenly shot up above 3/4 one day. I checked the old thermostat and it was indeed faulty.
Then a new problem appeared. When warmed up, my engine temperature now fluctuates between 1/4 and 1/2 according to the guage. It never reaches a steady operating temperature, cycling between 1/4 and 1/2 continuously, every 30-40 seconds. Which is scary when driving!
I flushed the cooling system (it seems to flow fine), and bled it when refilling. The electric fan is working correctly. I think the guage itself is OK as it responds consistently.
I've tried it without a thermostat and it runs OK, but of course never warms up. If ticking over in traffic, it eventually reaches just over 1/2 and the fan kicks in as expected.
So it looks to me like a thermostat problem, and to make sure, I even bought another genuine Renault thermostat, but the problem persists.
I've never seen this before, and can't find reference to it in any forums. So any ideas gratefully received.
Cheers.
|