Tue, Sep 21, 2021

The rocker arms are positioned between the pushrod and intake/exhaust valves. In motors with a camshaft located in the engine block, the exhaust and intake valves are actuated by rocker arms, which in turn are actuated by pushrods and cam followers. Thus, when the rocker arms are damaged, loose or improperly installed, valve function will be impacted directly. 

Ultimately, this will restrict your engine performance and safety. Read more about the signs of diagnosing a defective rocker arm. 

Clicking Noises 

There may seem to be a rapid clicking or ticking sound, similar to a sewing machine, from the engine. You should inspect the arms and surrounding areas while the engine is running if you hear this noise. 

Deficient rocker arms may lead to valves jamming or inefficient opening and closing. 

If your rocker arms seem to operate in a decent way when visually inspected, proceed to the next step in correcting the issue.

Low performance of the engine

Timing is everything in the internal combustion engine. For maximum efficiency, valve opening and shutting timing must be accurately synchronized with the combustion cycle.

You may feel less power and less acceleration if a defective rocker arm of the car interferes with its ability to generate power. The engine may suddenly stop while driving under extreme situations. The automobile ultimately fails to turn the ignition on without replacing the damaged part.

Check the Light Engine

The check engine light illuminates to tell the driver when the automobile detects some issue in engine performance. You should use a diagnostic scanner to check for any problems. Given the AI system installed in current cars, which diagnoses the engine and alerts the driver of problems with the vehicle, this worrying indication on the system should not be ignored.

Physical Deterioration

Cracks or wear may also be readily evident on the rocker arm’s working surfaces. Look for metal chips under the rocker’s arms or between the centre bush and its mounting shaft that might grind against the mating part and cause premature wear.

Even when no other symptoms present, degraded rocker arms should be replaced since they may put undue stress on other components and shorten engine life.

Remove the valve cover, and check physically for metal chips behind the rocker arm if you hear ticking/clicking sound continuously from the engine. Because of the friction, the valve tip and rocker arm may melt together and harm the rocker arm’s surface.

If a damaged rocker arm is detected, it should be replaced as quickly as feasible, even if no other symptoms become visible since problems may emerge later on with time.

Rocker arms often consist of stamped steel, a flat metal sheet pressed and formed by a die. Steel is an appropriate option for economical cars since it’s robust and readily available.

In high-performance vehicles, aluminium rocker arms are typically employed since they are lighter. Motors for trucks often require stronger rocker arms made of forged carbon steel or cast iron to be able to handle the high working stresses these engines impose upon them.


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