Product Description
Interstate-McBee M-3920781 Cylinder Head Bolt – Rocker Arm | 1989–1998 5.9L Cummins 12-Valve
OE-style replacement cylinder head bolt used at the rocker arm pedestals on the 5.9L Cummins 12-valve (6BT). Built to OE form, fit, and function for dependable valvetrain service. Sold individually.
- Direct replacement: Matches OE dimensions for proper clamping at the rocker pedestals.
- Reliable materials: Quality steel fastener engineered for repeatable torque and service life.
- Service friendly: Ideal when refreshing rocker assemblies or performing head work.
- Value: Interstate-McBee quality at a fraction of OEM boxed pricing.
What’s Included
- (1) Cylinder head bolt – rocker arm, P/N M-3920781
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 with 5.9L Cummins 12-valve (6BT)
- Model Years: 1989–1998
- Other B-Series applications where Cummins 3920781 is specified (confirm by ESN).
Recommended/Related Parts
- Rocker arm pedestal(s)
- Rocker arm assemblies
- Cylinder head gasket & fasteners (if performing head service)
- Valve cover gasket set
Install Notes
- Follow the Cummins service manual torque and sequence for rocker pedestal fasteners.
- Use clean, lightly oiled threads unless otherwise specified by the manual.
- Verify rocker geometry, lash settings, and pedestal seating during reassembly.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, competitive pricing
- Deep inventory of complementary B-Series valvetrain parts
FAQ
Q: Is this the main head bolt or the rocker pedestal bolt?
A: This is the rocker arm pedestal cylinder head bolt used to secure the rocker assembly to the cylinder head.
Q: How many will I need?
A: Quantity varies by configuration. Check your service manual or verify by ESN to determine the exact count for your engine.
Q: Can I reuse my old bolts?
A: Inspect for stretch, thread damage, or corrosion. Replace any questionable fasteners and always follow the Cummins manual.
Specifications for Interstate-McBee M-3920781
| Brand | Interstate-McBee |
| Part Number | M-3920781 |
| UPC | Not specified by manufacturer/seller |
| GTIN | Not specified by manufacturer/seller |
| Shipping Info | Package weight: Not specified (single rocker arm cylinder head bolt). Other shipping dimensions/method: Not specified. |
| Cross Reference | OE-style replacement for Cummins cylinder head / rocker arm bolt 3920781 used on 1989–1998 5.9L 12V Cummins applications. Additional detailed cross reference numbers: Not specified by manufacturer. |
| E-Codes | Not specified |
| Prop 65 | WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information: https://www.P65Warnings.ca.gov |
