Fan cut in Temp

cyclemike4

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#41
A F1 engine machine work is done with full torque done on the cylinders just like it would have a head on it and ready to run. It has water running through it to bring the parts up to race temp like the engine is running. then all the machine work is done so that the torque effect from assembly and the heat expansion will have no effect on running tolerances. Not that i am an expert but that is just what i have read about race engines. Make sense to me if you have millions to spend. I guess it would be like cold seizing a two stroke dirt bike on start up where the piston expands faster than the cylinder and seizes. I have seen my buddies to that on cold days not letting the bike warm up before hammering on them.
 

steve68steve

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#42
But some racing engines are built seized and have to be warmed up before they can be started. Which suggests that as the engine warms the tolerances get bigger not smaller.


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I never heard of that either - thanks for sharing.

It does make the larger point that engine operating temps matter, and are designed for preventing damage/ destruction to mechanical components.
 
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