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

Product Description

Cummins 3977063 OEM Cylinder Head Gasket Standard Thickness | 5.9L 24-Valve Cummins (1998.5–2002)

The Cummins 3977063 OEM Cylinder Head Gasket is a genuine Cummins replacement gasket designed for 1998.5–2002 Dodge Ram trucks equipped with the 5.9L 24-valve ISB Cummins diesel engine. Manufactured to meet original Cummins specifications, this standard-thickness head gasket provides the proper combustion sealing, coolant sealing, and oil passage sealing required for long-term engine reliability.

Whether you're performing a stock engine rebuild, replacing a failed head gasket, or refreshing your 24-valve Cummins during cylinder head service, the Cummins 3977063 offers OEM fit, durability, and sealing performance. Unlike aftermarket alternatives, genuine Cummins gaskets are engineered to maintain proper compression ratios and sealing characteristics while standing up to the heat and pressure demands of diesel operation.

Features

• Genuine Cummins OEM cylinder head gasket
• Standard thickness design
• Direct replacement for factory-installed head gasket
• Designed for 5.9L 24-valve ISB Cummins engines
• Provides proper combustion, coolant, and oil sealing
• Maintains factory compression ratio specifications
• Engineered to Cummins OEM standards
• Ideal for stock rebuilds and engine repairs
• Durable multi-layer construction for long service life
• Trusted OEM quality and fitment

Fitment

• 1998.5 Dodge Ram 2500 5.9L Cummins 24-Valve
• 1998.5 Dodge Ram 3500 5.9L Cummins 24-Valve
• 1999 Dodge Ram 2500 5.9L Cummins 24-Valve
• 1999 Dodge Ram 3500 5.9L Cummins 24-Valve
• 2000 Dodge Ram 2500 5.9L Cummins 24-Valve
• 2000 Dodge Ram 3500 5.9L Cummins 24-Valve
• 2001 Dodge Ram 2500 5.9L Cummins 24-Valve
• 2001 Dodge Ram 3500 5.9L Cummins 24-Valve
• 2002 Dodge Ram 2500 5.9L Cummins 24-Valve
• 2002 Dodge Ram 3500 5.9L Cummins 24-Valve

Note: Always verify piston protrusion, block deck condition, and cylinder head flatness before installation. Proper torque procedures and new head bolts or studs are recommended during reassembly.

What's Included

• Cummins 3977063 OEM Cylinder Head Gasket

Specifications

• Manufacturer: Cummins
• Part Number: 3977063
• Product Type: Cylinder Head Gasket
• Thickness: Standard Thickness
• Engine Compatibility: 5.9L ISB 24-Valve Cummins
• Engine Years: 1998.5–2002
• Fuel Type: Diesel
• Configuration: Inline 6-Cylinder
• OEM Replacement: Yes
• Application: Dodge Ram 2500 and 3500
• Installation Location: Cylinder Head to Engine Block
• Primary Function: Combustion, Oil, and Coolant Sealing

Cross Reference Numbers

3977063, Cummins 3977063, OEM Cummins Head Gasket, 24-Valve Cummins Head Gasket, ISB 5.9 Cylinder Head Gasket

FAQ

Is the Cummins 3977063 a standard-thickness head gasket?

Yes. The 3977063 is the OEM standard-thickness cylinder head gasket used on 1998.5–2002 5.9L 24-valve Cummins engines.

Will this fit a 12-valve Cummins engine?

No. This gasket is designed specifically for 24-valve ISB Cummins engines found in 1998.5–2002 Dodge Ram applications.

Should I replace the head bolts when installing this gasket?

Yes. Cummins recommends inspecting and replacing fasteners as needed. Many builders choose to install new head bolts or upgrade to performance head studs during reassembly.

Can this gasket be used in performance applications?

Yes. While designed as an OEM replacement, the 3977063 is commonly used in stock and mild performance builds when paired with proper fasteners and tuning.

What causes head gasket failure on a 24-valve Cummins?

Common causes include excessive boost pressure, overheating, improper torque procedures, cylinder head warpage, and age-related wear.

Is this a genuine Cummins part?

Yes. The 3977063 is an OEM Cummins cylinder head gasket manufactured to original equipment specifications.