Maintenance And Causes Of Failure Of Rocker Arm.
Rocker arms are typically located between the push-rod and intake and exhaust valves. They are pushed and pulled by push-rods to “rock” up and down, opening and closing the exhaust valve and intake valve
of the combustion chamber on engines with a camshaft below the engine.
With broken or loose rocker arms, the exhaust valves and intake valves can't function correctly and the cylinder associated with the faulty rocker arm will be disabled. This will ultimately limit the performance of your engine and your ability to drive the car smoothly and safely.
Common
Symptoms of a Bad Rocker Arm
1 - Unusual Noises :-
Sound like
a rapid clicking or ticking, similar to a sewing machine.
(if you have to experience
what actually it sounds, check this link on youtube https://youtu.be/EC4ICbhqO6U
)
2 - Weak Engine Performance or Stalling :
If the
vehicle’s faulty rocker arm is getting in the way of this process, you’ll
notice decreased power and poor
acceleration.
3 - Check Engine Light On :
Your vehicle
will recognize weak engine performance
as well, and will warn you by illuminating the check engine
light. You must
not ignore this indication.
Its very
cheap to change the rocker arm rather than changing the whole engine or an other
parts of the vehicle engine. It costs almost Rs.70~100 depending upon the type of your vehicle and size
of rocker.
Cause
of failure:
Due to
fluctuating loads applied while running the vehicle, any defects in the
manufacturing process will expose the rocker arm to cause fatigue failure. In
order to counter the possibility of fatigue failure, most of the rocker arms
are manufactured through forging process,
which improve strength and reduces defects occurred in the manufacturing process.
However, in certain cases, failure of rocker arms still occurs due to uneconomical
way of driving conditions, such as:
1) Over revving the engine to show off which is too common now
a days,
2) Taking your vehicle to off road while it is mainly manufactured
for urban and daily usage. This is more popular in rural areas where most of
the companies try to build their vehicles to sustain the extreme conditions of
roads even the slippery and muddy monsoon season.
3) Not taking proper care and regular servicing of the
vehicle on time or when needed, which may lead to damage many other parts of
the vehicle.
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