Caterpillar 7N-3433 Rocker Arm Assembly
Specifications
| Part type | Rocker arm assembly (injector/exhaust) | |
|---|---|---|
| Valve train function | Transfers cam/pushrod motion to actuate exhaust valves and unit injector | |
| Engine application | Caterpillar 3508 / 3512 / 3516 diesel engine family | |
| Fuel type | Diesel (not for G-series spark-ignited gas variants) | |
| Equipment use | Marine, industrial, and genset installations | |
| Country of manufacture | United States | |
| Approx. assembly weight | ~6.8 kg (~15 lb) per distributor listings | |
| Associated companion part | Listed alongside 2W-8893 / 196-4794 on distributor pages |
Technical notes
The 7N-3433 is a rocker arm assembly in the valve train of the Caterpillar 3500-series diesel engine family (3508/3512/3516), including the 3512B marine platform. On these engines each cylinder uses dedicated rocker arms that convert pushrod motion into precise actuation of the exhaust valves and the mechanically actuated unit injector, so correct rocker geometry and lash are critical to combustion timing and valve sealing. Distributor listings pair 7N-3433 with companion numbers 2W-8893 and 196-4794 and identify it for injector/exhaust positions. Because 3500-series engines are built in both diesel and spark-ignited gas (G3508/G3512/G3516) configurations, confirm the engine is a diesel variant and verify the serial-number arrangement and cylinder position against the Cat parts manual before ordering.
Compliance
Fitment and part identity reflect what marine/diesel distributor listings show for the 3508/3512/3516 diesel family; final application must be verified against the engine serial number and Caterpillar parts documentation before purchase.
Compatibility
Other parts in this series
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- Caterpillar 7C3614 Sea Water Pump
- Caterpillar 7N-2048 Camshaft Bearing
- Caterpillar 7W-5455 Bar Type Aftercooler Core
- Caterpillar 7W-6722 Governor / Speed Actuator Assembly
- Caterpillar 8N-2001 Oil Filter Base Assembly
Related
●RFQ answered within ~4 h at major hubs routed to vetted suppliers no public pricing
Frequently asked questions
- Does Caterpillar 7N-3433 fit the 3512B marine engine?
- Distributor sources list 7N-3433 as a rocker arm for the Caterpillar 3508/3512/3516 diesel family, which includes the 3512B platform. Always confirm against your engine serial number and the Cat parts manual, since rocker arms vary by cylinder position.
- Will this rocker arm work on a gas (G3512) engine?
- No. The sources identify 7N-3433 for the diesel 3508/3512/3516 engines. The spark-ignited G3508/G3512/G3516 gas variants use different valve-train parts and should not be assumed compatible.
- What are 2W-8893 and 196-4794 that appear with 7N-3433?
- Distributor listings show these as companion/alternate numbers associated with the same rocker arm grouping for the 3500-series engines. Verify the exact required number for your cylinder position before ordering.
Caterpillar 7N-3433 Rocker Arm Assembly
No public pricing — quoted per request