Quote:

It doesn't matter whether the engine is accelerating or decelerating, the crank is still turning in the same direction. The crank is still driving the cam in the same direction, and the cam is still driving the oil pump in the same direction. The cam is being forced back towards the back of the block by the resistance of the oil pump drive.



my meaning is the changes in velocity of the cam that occurs when the engine changes speed(rpm). Yes, if you want to be specific, the resistance in the oil pump contributes greatly to this action. Same thing happens with the rear axle gears when you get on an off the throttle.

Last edited by torkrules; 03/25/13 07:17 PM.