Product Description

CUMMINS 3977063 OEM CYLINDER HEAD GASKET (STANDARD THICKNESS) – RAM 5.9L 24V (1998.5–2002)

The genuine CUMMINS 3977063 OEM cylinder head gasket is the factory-standard MLS (Multi-Layer Steel) gasket engineered specifically for the 1998.5–2002 5.9L 24-valve ISB. If you are rebuilding your top end, repairing injector cup issues, or refreshing an aging high-mileage ISB, using an OEM head gasket is the only way to guarantee factory-correct sealing, durability, and combustion containment. Cheaper aftermarket copies cannot match Cummins engineering tolerances, heat cycling resilience, or coating formulation.

This gasket is the standard thickness version, ensuring proper piston protrusion, injector spray targeting, and quench characteristics on stock-spec engines. It is recommended for all rebuilds where the deck and head have not been significantly machined. For performance or high-boost builds, consult Cummins upgraded gasket options or additional head-fastening solutions.

CPP Diesel supplies only 100% genuine Cummins head gaskets, ensuring you receive the correct MLS layer count, embossed sealing rings, and corrosion-resistant coating required for long-term durability.

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Key Features

• Genuine Cummins MLS gasket – no substitutes, no offshore copies.
• Standard thickness for correct OEM compression and quench clearance.
• Engineered for 1998.5–2002 5.9L ISB 24V with precise combustion sealing requirements.
• OE coatings and embossing for long-term, leak-free performance.
• The ideal choice for stock and stock-style rebuilds.

Fitment Details

• Engine: 5.9L Cummins ISB 24-Valve (1998.5–2002)
• Common Vehicle Applications: 1998.5–2002 Dodge Ram 2500/3500
• Notes: Standard thickness; always verify piston protrusion and machining before selecting gasket thickness.

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Installation Notes

• Always clean the block deck and cylinder head surface to a non-abrasive, smooth finish.
• Confirm proper piston protrusion, head flatness, and surface RA per Cummins specifications.
• Use new head bolts or *verify reusable fasteners meet stretch and length requirements*.
• Perform proper torque sequence and angle-tightening with calibrated tools.

Specifications for cummins 3977063

Frequently Asked Questions

IS THIS THE CORRECT HEAD GASKET FOR MY 1998.5–2002 CUMMINS 5.9L 24V?

Yes — 3977063 is the standard-thickness OEM MLS head gasket for 24-valve ISB engines used in 1998.5–2002 Ram 2500/3500 trucks. Always confirm by VIN/ESN.

IS THIS GASKET SAFE FOR PERFORMANCE OR HIGH-BOOST BUILDS?

For mild upgrades it is generally suitable, but high-boost applications often require upgraded fasteners, resurfacing specs, or performance-oriented gasket solutions. Always consult a Cummins specialist.

WHAT THICKNESS IS THIS GASKET?

This is the standard OEM thickness head gasket. Machined blocks or heads may require alternative thickness selection.

SHOULD I REPLACE THE HEAD BOLTS OR HEAD STUDS?

Yes — replacing or upgrading fasteners is strongly recommended. OEM bolts are torque-to-yield and may not be reusable depending on measurements.

IS THIS A REAL CUMMINS PART?

Yes. CPP Diesel supplies only 100% genuine Cummins OEM components.