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Originally Posted by zombie13
Other that it being bad, what would happen if you overfilled? (the oil for that matter too?) It seems to me it would just sit in the pan. (I admit to knowing very little about the actual functioning of a modern engine.)
Z.
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I know that the primary danger of overfilling an engine is that the oil level in the crankcase will get so high that the bottom of the spinning crankshaft will hit the oil, causing foaming (air bubbles in the oil). The force of the oil hitting the crankshaft can cause problems at high RPMs - at the same time the air bubbles are reducing the effectiveness of the oil's lubricating properties.
I'm less certain what the real danger is if an automatic transmission is overfilled. Anyone with more knowledge on this topic?