by rebuilder86 » Wed Aug 08, 2018 12:13 pm
I litteraly just came on here to post, the exact same post.
2.5 td 100 PS, in perth australia, currently really cold wet weather, and for the first time ever, the gauge went up to 3/4 the way to red last week.
And tonight, while it was very cold out, the gauge went up to midway, wich it never does unless climing long long hills.
Mine I suspect has no thermostat, as the temp gauge varies considerably up and down during the journey, and usually sits way tooo cold, like just touchign the operating range line, almost at the very left.
Having no thermostat, actually causes big problems.
No thermostat means no back pressure on the water pump, which creates cavitation (aeration of the water aroundthe fins of the water pump) which increases corrosion and wear on the vanes in an exponential amount.
My fear is that im probabyl experiencing this, but it could be that
a. the rain is getting in to the electronics and shorting the temp sensor a bit, or
b. the rain is getting into a connector perhaps just creating a good contact in a slightly coroded connection to the temp sensor, indicating a more correct warm temp when its raining.
Nothing felt remarkably hot when i had the really hot situation, however i got home, and found i needed about 2 litres of coolant (water) to bring it up to the normal mark, and it hasnt crept that frar since then. The creep up was incredibly fast, like i watched the gauge move.
So theres some food for thought, its a complicated subject with far too many variables.