DJ Rock IV3138 Engine Intake Valve

Overview

DJ Rock IV3138 is an application-specific engine intake valve for GM and related SUV applications. It is built as a direct-fit replacement with nitride-coated construction for durability under high heat and repeated valve operation.

Key Features

• Nitride-coated valve surface for improved wear resistance and corrosion protection.
• 37 mm valve head diameter with a 5.96 mm stem diameter.
• 105.4 mm overall length for application-specific fitment.
• 3-groove design for the listed engine applications.
• Manufactured to meet or exceed OEM quality standards.

Detailed Description

The DJ Rock IV3138 intake valve controls the air-fuel charge entering the combustion chamber, making it a critical valvetrain component for proper engine breathing and power delivery. This part number IV3138 is engineered for direct-fit replacement in listed Chevrolet Colorado, GMC Canyon, and related applications, with fitment also covering Buick Rainier, Chevrolet Trailblazer, GMC Envoy, Isuzu Ascender, Hummer H3, Saab 9-7x, and Oldsmobile Bravada models shown in the fitment data. The nitride-coated finish adds surface durability and helps the valve withstand thermal and mechanical stress in demanding engine environments. This part cross-references Melling V1998 for the same application.

What It Helps Address

• Loss of compression caused by a worn or damaged intake valve.
• Rough running from poor sealing at the valve seat.
• Reduced airflow into the combustion chamber.
• Engine performance issues related to heat-stressed valvetrain components.
• Valve wear from prolonged high-temperature operation.

Installation Notes

Verify engine code and valve specifications before installation. Confirm the 37 mm head diameter, 5.96 mm stem diameter, 105.4 mm length, and 3-groove configuration against the original part. Professional cylinder head service procedures are recommended for intake valve replacement.

Quality Assurance

DJ Rock lists this intake valve as a premium-grade replacement manufactured to meet or exceed OEM quality standards. The nitride-coated surface is selected to improve wear resistance, reduce friction, and support long-term valve stability under severe operating conditions.