Quote:
Originally Posted by carbonBLUE
ok
1. air is less dense when hotter
when air goes into the cylinder its cooler, the metal in the combustion chamber heats the air resulting in a pressure drop.
2. coolant
i had to fill my coolant overflow twice now, after 25k miles i have yet to add a drop of coolant to my car. Seems like the car has a long break in period for misc items.
coolant also splashes out of the overflow a lot and the engine does run hot enough to evaporate it but not boil over.
my passenger window always works now
crickets... still there but no performance issues yet
idle doesn't dip anymore
ect. ect.
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If you heat a gas and its volume remains the same the pressure will go up not down. The hot metal in the combustion chamber will heat the air resulting in a pressure increase, in theory. That's why hot tires have higher psi than cold. Also, I have never heard of a coolant system having a break in period but I guess its possible for the seals and gaskets and hose clamps to settle in a bit.