Synchronous pulleys are part of the timing belt system […]
Synchronous pulleys are part of the timing belt system for cars. The timing belt is a way of controlling the opening and closing of the engine valve by connecting the crankshaft to the camshaft of the vehicle. Generally, the timing belt does this by having teeth that lock into the teeth of the two gears for the crankshaft and camshaft.
The timing belt plays a vital role in maintaining the valve and piston in precise order. Each valve and piston assembly must push down the cams on the camshaft at the right moment. Think of a bike who waits until a pedal reaches the top before it can bear it again. If he tries to push the other pedal too quickly, his feet may fall, or the pedal may break. The timing belt is used to prevent the piston and the valve from pushing the camshaft before the camshaft reaches a complete cycle.
Due to the importance of the timing belt, it is necessary to check and replace regularly. When installing a new belt, it is important that the crank and cam gears are in the same orientation as before removing the old belt. The new belt can then be tensioned, the process for which can differ depending on whether the application uses an automatic or manual tensioner. Manual tensioners must be set by prying the tensioner and measuring the belt tension, while an automatic tensioner need only be released from its compressed state to apply the correct tension.
If the timing belt breaks before replacement, the engine can perform a compression test at this point. This test can reveal whether the belt is damaged when the belt is broken. If the timing belt is not installed correctly, this type of valve damage will occur, which is why it is important to ensure that the cam and crank gear are properly synchronized when installing the Timing Belt Manufacturers.