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INTERSTATE MCBEE

INTERSTATE-MCBEE M-3901221 SHORT ROCKER MOUNTING STUD 89-98 5.9L CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-3901221
MPN:
M-3901221
Shipping:
Calculated at Checkout
$2.49
724-785-4022

Description

Interstate-McBee M-3901221 Short Rocker Mounting Stud — 89–98 5.9L Cummins 12V

Heavy-duty short rocker mounting fastener (stud/bolt) for the rocker lever pedestal on 1989–1998 Dodge Ram 5.9L Cummins 12-valve engines. Built to OEM-equivalent specs for a precise fit and durable clamping force in the valvetrain. Cross-references Cummins 3901221.

  • Direct fit: OEM-style replacement for the short rocker pedestal fastener on 12V 5.9L.
  • Durable construction: Quality aftermarket hardware designed for repeated service cycles.
  • Consistent clamping: Helps maintain proper rocker pedestal alignment and valve lash stability.
  • Cost-effective: Interstate-McBee value versus OEM boxed hardware.

Specifications

Brand Interstate-McBee
Part Number M-3901221
OEM Cross-Ref 3901221 (Cummins)
Position Rocker lever pedestal — short mounting fastener
Engine Cummins 5.9L 12-Valve (6BT)
Applications Dodge Ram 2500/3500 (see fitment below)
What’s Included (1) rocker pedestal short fastener (no nuts/washers included)

Vehicle Fitment

Always verify by engine serial number (ESN) when possible.

  • Dodge Ram 2500/3500 — 5.9L Cummins 12-Valve
    • 1989–1993 (VE-pump)
    • 1994–1998 (P7100-pump)
  • Notes: Also used across many B-Series 4BT/6BT industrial variants; confirm by ESN for non-automotive engines.

Install Notes

  • Follow the Cummins service manual for pedestal hardware order, tightening sequence, and torque values.
  • Inspect pedestals and rocker arms for wear; replace any damaged components.
  • If using cylinder head studs, ensure valve cover clearance; some builds require notched/machined rockers or pedestals.

Why Buy From CPP Diesel

  • Application-correct B-Series hardware curated by diesel techs.
  • Fast shipping, easy returns, and ESN-verified fitment support.
  • Deep catalog for 12V/24V Cummins valvetrain, gaskets, and fasteners.

FAQ

Is this the correct fastener for 12-valve rocker pedestals?
Yes. M-3901221 is the short rocker pedestal fastener for 1989–1998 5.9L Cummins 12V applications. Verify by ESN for edge cases or mixed-year engines.
Is it a stud or a bolt?
It’s an OEM-style rocker pedestal mounting fastener that cross-references Cummins 3901221, commonly listed as a hex head cap screw. Naming varies by catalog, but function and fitment are the same.
How many do I need?
Quantity depends on the pedestal hardware layout. Check your service manual or count existing hardware during teardown.
Will this fit 24-valve (1998.5–2002) engines?
No. 24-valve ISB engines use different valvetrain hardware. Use parts cataloged for 1998.5–2002 5.9L ISB.
Any special torque specs?
Always follow Cummins model-specific torque specs and sequences from the factory service manual.
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