Engine Rocker Arm and Shaft Assemblies

Replacement Parts > Engine > Valve Train Components

Engine Rocker Arm and Shaft Assemblies

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What is an Engine Rocker Arm and Shaft Assembly?

An Engine Rocker Arm and Shaft Assembly is a combination of parts used in an engine valvetrain system to control the opening and closing of the valves. It consists of the rocker arm, shaft, and other components such as pushrods, bearings, and gaskets.

What is the purpose of an Engine Rocker Arm and Shaft Assembly?

The primary purpose of an Engine Rocker Arm and Shaft Assembly is to transfer the motion of the camshaft to the valves in order to open and close them. This allows the engine to control the amount of air and fuel that enters the cylinders, which in turn regulates the power output of the engine.

How do I know if my Engine Rocker Arm and Shaft Assembly is faulty?

Signs that your Engine Rocker Arm and Shaft Assembly may be faulty include: excessive noise from the valvetrain, misfiring, or increased engine vibrations. You can also visually inspect the parts for signs of wear or damage.

Can a faulty Engine Rocker Arm and Shaft Assembly cause damage to my vehicle?

Yes, a faulty Engine Rocker Arm and Shaft Assembly can cause damage to your vehicle. If the valvetrain is not functioning correctly, it can lead to overheating and reduced engine performance. In extreme cases, it can cause more serious engine damage such as piston failure.

How do I replace my Engine Rocker Arm and Shaft Assembly?

Replacing an Engine Rocker Arm and Shaft Assembly is a complex process and should only be done by a qualified mechanic. However, the general steps are as follows:

  1. Disconnect the negative battery cable and drain the engine oil.
  2. Remove the valve cover and other components that cover the rocker arms.
  3. Unbolt the rocker arms and remove them from the head.
  4. Install the new rocker arms and shaft assembly and bolt them into place.
  5. Reinstall the valve cover and any other components that were removed.
  6. Refill the engine with oil and reconnect the negative battery cable.


How often should I inspect my Engine Rocker Arm and Shaft Assembly?

It is recommended that you inspect your Engine Rocker Arm and Shaft Assembly every 10,000 miles or at every oil change. It is also a good idea to visually inspect the parts whenever you are performing other maintenance or repairs on your vehicle.