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INTERSTATE MCBEE

INTERSTATE-MCBEE M-3940059 CAM BEARING – STORM BLOCK/CR 97.5–18 5.9L/6.7L CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-3940059
MPN:
M-3940059
Shipping:
Calculated at Checkout
$14.52
724-785-4022

Description

Interstate-McBee M-3940059 Cam Bearing – Storm Block/CR 97.5–18 Cummins 5.9L/6.7L

 

The Interstate-McBee M-3940059 is the thick camshaft bearing (bushing) used on Cummins B-Series Storm Block and Common Rail engines. It’s an OEM-style aftermarket replacement that restores proper cam support and oil control on 1997.5–2018 5.9L/6.7L Cummins applications.

  • Direct-fit, OEM-style: Matches Cummins 3940059 spec (see cross-refs).
  • “Thick” bushing design: Correct for Storm Block and CR engines to ensure proper press fit and oil feed.
  • Durable construction: Precision-machined bearing alloy for stable cam support and long service life.
  • Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.

Specifications

Part Number M-3940059 (Interstate-McBee)
OEM Cross-Reference 3940059 (Cummins)
Additional Cross-Ref 4983253
Style Camshaft bearing (bushing), thick specification
Block Compatibility Storm Block & Common Rail (CR)
Position Camshaft bearing/bushing

Vehicle Fitment

Always verify by Engine Serial Number (ESN), especially on transition years.

  • Dodge Ram 2500/3500 – 5.9L Cummins
    • 1997.5–1998 (12-Valve, late Storm Block)
    • 1998.5–2002 (24-Valve ISB)
    • 2003–2007 (24-Valve ISB Common Rail)
  • Dodge Ram 2500/3500 – 6.7L Cummins
    • 2007.5–2018 (24-Valve ISB Common Rail)

Install Notes

  • Inspect cam journal and housing; correct any damage or out-of-round before pressing in the bushing.
  • Align the oil feed correctly; use proper drivers and support the housing to prevent distortion.
  • After install, verify oil clearance and free rotation per Cummins service manual.

Warranty

Interstate-McBee new engine components include manufacturer warranty coverage. Contact us for terms applicable to cam bearings.

Cross-Reference & Notes

Interchanges with Cummins 3940059; also referenced as 4983253. Use this thick bushing for Storm Block/CR engines. For non-Storm applications, verify the correct bushing by ESN.

Why Buy From CPP Diesel

  • ESN-verified fitment help from real diesel techs
  • Fast shipping and straightforward returns
  • Deep inventory of B-Series engine internals to finish the job

FAQ

What does “Storm Block” mean and why the thick bushing?
“Storm Block” is a later B-Series block casting used on late 5.9L and most CR engines. It requires a thick cam bushing (this part) to achieve the correct press fit and oiling alignment.
Will this fit both 5.9L and 6.7L?
Yes—this M-3940059 thick cam bushing is listed for 5.9L (1997.5–2007) and 6.7L (2007.5–2018) Cummins. Always confirm by ESN.
Is this the same as Cummins 3940059?
It is an OEM-style aftermarket replacement that cross-references Cummins 3940059 and is also associated with 4983253.
Any special tools needed?
A cam bushing/bearing installer, correct drivers, and a way to verify alignment/clearance. Follow the Cummins service manual.
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Additional Information

YEAR:
1997.5-2018
MAKE:
DODGE
ENGINE:
5.9L,6.7L
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