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3078322 | Caterpillar 3406E/C15/C16 Rocker Arm Shaft

Pricing: $127.12

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When it comes to rocker arm shafts, why risk your engine?

Don't let a small part turn into a major repair. We wouldn't risk putting sub-par parts into our engines, so why should you? HHP only sells rocker arm shafts that are manufactured in a state of the art facility using top of the line machining and measuring equipment to ensure each part is manufactured OEM specifications. Combine this with with up to 50% off OEM prices, an industry leading 2-Year Parts and Labor Warranty and technical expertise from HHP’s certified staff, and you've got quality that will keep you running for another million miles.

Need a little extra proof? Let's talk shop.

  • Don't worry about overpaying. Every component is built to OEM specifications giving you proper fit and function. You'll save up to 50% off OEM prices with HHP.
  • You'll get the best quality because every rocker arm shaft is Manufactured and Assembled in an ISO 9001: 2008 Certified Facility.
  • Get excellent rotation and transfer of motion with a brand new rocker arm shaft. You'll get the longest life possible out of it.
  • Backed by support from our ASE certified expert technicians with over 30-Years of expertise at HHP. You'll be back up and running in no time.


  • (1) Rocker Arm Shaft


2-Year Parts and Labor Warranty

Warranty acceptance/denial will be at the sole discreation of each respected manufacturer. Each of HHP's manufacturers utilizes their own warranty procedures which vary in claim review time (typically between 3-5 weeks). On items that carry a labor warranty, rates are paid on flat-rate book time. Rates vary by manufacturer.

OEM Applications:
  • 307-8322
  • 3078322
  • M-3078322
  • M3078322

Technical Data

C15 Engine Specifications:
Year: 1999-2007
Liter: 15.2
CID: 928
Cylinder: L 6
Bore/Stroke: 5.4000-5.4020", 6.7320"
Firing Order: 1-5-3-6-2-4

Tune-Up Specifications:
Intake Valve Lash: .015"
Exhaust Valve Lash: .030"

Caterpillar C16 Engine Specifications:
Year: -
Liter: 15.6
CID: 955
Cylinders: L 6
Bore/Stroke: 5.4984-5.5004" 6.750"
Compression Ratio: -
Firing Order: 1-5-3-6-2-4

Tune-Up Specifications:
Oil Pressure At Idle: 14.5 Psi Minimum
Oil Pressure: 88 PSI Maximum
Intake Valve Lash: .012-.018"
Exhaust Valve Lash: .027-.033" (.680-.840 MM)

3406Engine Specifications:
Year 1993-2005
Liter 14.6
CID 893
Engine Code 3406E
Cylinder L 6
Bore/Stroke 5.400-5.402" (137.16-137.211 MM)6.500" (165.1 MM)
Compression Ratio: 14.5:1
Firing Order 1-5-3-6-2-4
Comments DIESEL 3406E TRUCK, OHC, 24 VALVE, 5DS-1LW

Tune-Up Specs:
Compression Ratio: 174.5:1
Firing Order: 1-5-3-6-2-4
Intake Valve Lash: .012-.018" cold
Exhaust Valve Lash: .027-.033" cold

Camshaft Specifications:
Camshaft Journal Diameter: 3.3398-3.3413"
Camshaft Gear Bolt Torque: 150-210 FT/LBS
Lobe Lift:
Intake: .3820"Exhaust: .3352"

Lubricate bore of exhaust valve bridge with clean engine lubrication oil prior to installation on engine.

Rebuild Kit & Gasket Set OEMs

  • (1) Rocker Arm Shaft, 3078322


Shipping Information

  • Item Requires Shipping
  • 6.0 lbs.
  • W2.8000” x H2.8000” x L13.0000”

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