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How to Remove Cam Sprockets

The cam sprockets in an automotive engine resemble round gears and generally have deep teeth to maintain consistent hold of the timing belt or chain, thus removing them may be a daunting task. Because of how intensive this procedure is for most vehicles, it is recommended that other service procedures be undertaken at the same time while those areas of the engine are being accessed. The most important items to service while you have access would be the timing belt (especially in an interference engine) and the water pump.

Instructions

1

Raise your vehicle and support it on jack stands, as most vehicles will require access from underneath the engine.

2

Disconnect the negative battery terminal to prevent an electric discharge that may cause a fire.

3

Remove the accessory drive belts or serpentine belt and locate the timing covers which are directly behind them.

4

Remove the timing covers and the timing belt or chain from the vehicle according to the manufacturers instructions. As it is highly recommended to replace the timing belt, the new belt should come with instructions specific to your vehicle on safely removing the old one.

5

Grip the sprocket with the sprocket holding tool according to the instructions. If you do not have a holding tool, one can be made by inserting two bolts into a pre-drilled metal bar. The bolts should have a space between them roughly the width of the sprocket spokes and the metal bar should have enough length to provide adequate leverage against a strong torque. Once you have a tool in place to provide counter-leverage and hold the sprocket in place, remove the sprockets mounting bolt from its hub.

6

Pull the sprocket from the camshaft and repeat this procedure on the other sprocket as necessary. When reinstalling the sprockets and timing components, it is important to tighten each bolt to the manufacturers specifications with a torque wrench. If your vehicle uses a timing chain, observe the manufacturers recommendations regarding chain lubrication.