Rocker Arms
Rocker arms are essential valvetrain components that transfer motion from the camshaft to the engine valves, allowing proper intake and exhaust operation. Advanced Truck Parts supplies heavy-duty rocker arms for Cummins, Detroit Diesel, Paccar, Volvo, Mack and other commercial diesel engine platforms.
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What a Rocker Arm Does
A rocker arm converts the camshaft’s rotational movement into the vertical motion needed to open and close engine valves. This process allows air and fuel to enter the combustion chamber while also allowing exhaust gases to exit the engine.
Common Engines Using Rocker Arms
- Cummins ISX, X15 and ISB 6.7 engines
- Detroit Diesel DD13, DD15 and DD16 engines
- Paccar MX-13 and MX-11 engines
- Volvo D11, D13 and D16 engines
- Mack MP7, MP8 and MP10 engines
- Caterpillar C13 and C15 engines
- International A26 and MaxxForce engines
Common Signs of Rocker Arm Failure
- Engine misfires or poor performance
- Ticking or tapping noises from the valve train
- Improper valve timing
- Excessive valve train wear
- Loss of engine power
Verify Fitment Before Ordering
Rocker arms vary by engine platform and valve train configuration. To confirm compatibility provide:
- Engine serial number
- Current rocker arm part number
- Truck VIN number
- Year / Make / Model of truck
- Photos of the rocker assembly if available
Why Buy Rocker Arms from Advanced Truck Parts?
- Fitment verification before purchase
- Competitive pricing on heavy-duty diesel components
- Fast nationwide shipping
- Business account discounts available
- Trusted U.S. commercial truck parts supplier
