Cummins 4947667 — Genuine Rear Main Seal Cover Gasket for 5.9L

MPN: 4947667  |  Also Known As: rear cover gasket, rear main seal housing gasket, rear crank seal cover gasket  |  Cross-Refs (ID only): 3928493, 3914386, 3938159, J938159, J914386, J928493

Genuine Cummins gasket that seals the rear main seal housing to the engine block on 5.9L B-Series engines. Prevents oil leaks and maintains crankshaft lubrication integrity. Direct-fit for 1989–2002 5.9L (12V & 24V VP44). Sold individually (1 per engine).

Features & Benefits

• OE sealing profile for a precise, leak-free interface at the rear cover.
• Direct-fit replacement for 5.9L 6BT/ISB non-common-rail applications.
• Durable composite construction suitable for heat and oil exposure.
• Reduces mess & comeback risk when servicing rear main seals.
• Built to Cummins specs for fit, function, and longevity.

Verified Fitment (Automotive)

Industrial/Off-Highway: Common on BS3-era B-Series (4BT/6BT/ISB5.9). Verify by ESN before ordering.

Specifications

• Type: Rear main seal cover (rear cover) gasket
• OE Part Number: 4947667
• Cross-References (ID only): 3928493, 3914386, 3938159, J938159, J914386, J928493
• Quantity Required: 1 per engine (sold individually)

Often Paired With

• Rear main seal kit: Cummins 3926126 (with repair sleeve)
• Installer tool: CTA Tools 3880 (rear crankshaft seal tool)
• Fresh oil & filter: recommended after any major sealing work

What’s In The Box

• (1) Genuine Cummins Rear Main Seal Cover Gasket (4947667)

Installation Tips

• Clean mating surfaces thoroughly; remove old gasket material without scratching aluminum surfaces.
• Follow Cummins torque sequence/spec for the rear cover; avoid excess sealant unless specified by the service manual.
• When replacing the rear main seal, use the proper installer tool and verify crank endplay.

FAQ

WILL THIS FIT MY 1989–2002 5.9L CUMMINS RAM?

Yes—this is the OE rear main seal housing (rear cover) gasket for 1989–2002 5.9L 12V and 24V VP44 trucks (confirm by VIN/ESN).

DOES THIS INCLUDE THE REAR MAIN SEAL?

No—this is the housing gasket only. Pair it with Cummins 3926126 rear main seal kit if you’re servicing the seal.

ARE 3928493 OR 3914386 THE SAME PART?

Those are common cross-reference/legacy numbers used for the same rear cover gasket in catalogs. 4947667 is the current Cummins number for BS3 5.9L applications.

DO I NEED RTV OR SEALANT?

Install per the Cummins service manual. Typically the gasket installs dry; a small dab may be used at case joint seams if specified. Avoid excess sealant.

DOES THIS FIT 2003+ 5.9L OR 6.7L?

No—common-rail 5.9L and 6.7L engines use different rear cover/gasket designs. Order by VIN/ESN for those years.