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

Product Description

Interstate-McBee M-3940059 Cam Bearing – Storm Block / CR 5.9L & 6.7L Cummins (Aftermarket Replacement)

Quality replacement camshaft bearing for Cummins B-Series Storm Block / Common-Rail engines. Built to OE form, fit, and function for durable support of the camshaft under high load and oil-film conditions. Sold individually.

• Direct replacement: Matches the OE geometry and oiling features for reliable performance.
• Engineered materials: Bearing alloy construction for wear resistance and proper embedability.
• Service friendly: Compatible with standard cam bearing installation tools.
• Value: Interstate-McBee quality at an excellent price point.

What’s Included

• (1) Cam bearing, P/N M-3940059

Vehicle / Engine Fitment

Always verify by engine serial number (ESN) and parts catalog before ordering.

• Cummins B-Series Storm Block / Common-Rail applications (approx. 1997.5–2018), including:
  • 5.9L CR: typically 2003–2007 applications
  • 6.7L CR: typically 2007.5–2018 applications
• Use where Cummins 3940059 is specified.

Install Notes

• Use a dedicated cam bearing driver. Do not hammer directly on the bearing.
• Align oil holes precisely with block passages; verify orientation before final seating.
• Lubricate bearing ID and cam journals during assembly; check oil clearance to spec.
• Inspect camshaft for wear, scoring, and runout. Replace if out of spec.
• Clean all galleries and follow the Cummins service manual procedures and torque values.

Recommended/Related Parts

• Camshaft (matching profile for your application)
• Thrust plate / retainer hardware
• Front and rear main seals, timing cover gasket
• Oil pump and pickup tube seals (inspect while accessible)

FAQ

How many cam bearings do I need?

Quantity can vary by engine build. This listing is for one bearing (sold individually). Check your ESN and parts diagram to determine total count and positions.

Do I need machine work?

Not typically if the block bores are round and in spec. If there’s bore damage or misalignment, line-boring/honing may be required. Measure before assembly.

Will this fit my truck?

If your B-Series Storm Block / Common-Rail engine calls for Cummins 3940059, this bearing is the correct replacement. Verify by ESN for certainty.

Why Buy From CPP Diesel

• ESN-verified fitment help from diesel specialists
• Fast shipping and easy returns
• Deep catalog of Cummins B-Series valvetrain and bottom-end parts