GrumpyRuralBoy
Member
It amuses the schumck out of me that a "coolant" allows you engine to run hotter... #WhereIsEinstein
In the past vehicles ran at around 84 degrees in winter and 74 degrees in summer. (Needed a stat change) Anti freeze was taken out for summer and a lower stat fitted. Put in for winter and an higher stat fitted. Recently to help with environmental emission issues engine running temps went up to around 90 degrees. Newer engines now run at or slightly over water boiling point as a norm so coolant and a sound pressure system are essential. So basically if you have an engine that is designed to be more efficient running at 110 degrees and a coolant that does not boil until 140 degrees the statement makes sense.
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GrumpyRuralBoy
Member
In the past...? SAE grades are set at 100(212) running temperatures? 84 & 74 is way too low... this confuses the **** out of me - it can't be right...
What is "the past"...?
What is "the past"...?
ovalandrover
Well-Known Member
I was running my diesel with the Nanacom and reading the temperature when climbing up passes at 3000 m and the reading was abot 76 degees c and the temp gauge was in the center of the normal range.
When really working and the i have a slight rad leak the pressure forces about 1 l out the temp rises to the top of the normal scale and the temp reaches 82 so if it reached 100 it would be off the scale
When really working and the i have a slight rad leak the pressure forces about 1 l out the temp rises to the top of the normal scale and the temp reaches 82 so if it reached 100 it would be off the scale
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GrumpyRuralBoy
Member
Right. Gauges... on the hunt.
The past is before engine running temps were increased to reduce emissions and all year round coolant/antifreeze was developed. That was to do with the advent of aluminium heads/engines. In the sixties antifreeze was not left in the engine over summer. It was taken out and a 74 degree stat fitted. In winter antifreeze was added and a 84 degree stat fitted. I can assure you stats set at these temps are still freely available for older engines. Wouldn't be much use setting SAE oil grades at 25 degrees would it if most engines run between 74 to 90 degrees.
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P38 M51 engine has a 80 degree stat fitted so your figures sit very well with that.
