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- Valve Rocker Arm
- Replacement for Fo-rd F250 F350 F450 F550 Super Duty
The ratio of the arm length on both sides of the rocker arm is called the rocker arm ratio. The rocker arm ratio is about 1.2~1.8. One end of the long arm is used to push the valve, so that a larger valve lift can be obtained, and the push rod or lifter can be reduced. The amount of movement of the columns also reduces the inertial force generated by their reciprocating motion.
OEM Part Number:
- 8C3Z6564D
- 8C3Z-6564-D
Valve Rocker Arm Symptoms
Clicking or Ticking Noises.
If you hear a clicking or ticking noise when you start your engine, a worn rocker arm might be the problem.
Misfires or Stalling.
The rocker arm controls the amount of time each intake and exhaust valve is open, so it makes sense that if one of them isn’t functioning correctly
Check Engine Light.
There are tons of sensors monitoring your engine’s performance. Everything gets checked and verified for proper function.
Marc
Reviewed in Canada on March 26, 2025
Sa fait 2 que je commande et arrive toujours brisé mal emballé ne marque pas fragile trai décevant
Zager
Reviewed in Canada on November 15, 2024
Good replacement
Cristian
Reviewed in the United States on February 17, 2023
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