Does the crankshaft pulley move when engine is off?
Yes, the crankshaft pulley can move when the engine is off. This is because the crankshaft is connected to the transmission through the flywheel. When the transmission is in gear, the flywheel is connected to the wheels, and the wheels can turn the crankshaft even when the engine is not running. This is why it is important to put the transmission in neutral before starting the engine. If the transmission is in gear, the crankshaft can turn the wheels, and the car could move unexpectedly.