6L 6LT L8.9 C8.9 ISC ISL Full Gasket Kit 4089958 4089978 4089889 for Cummins Engine

Product Details

Product Overview

This heavy-duty Full Gasket Kit is specifically designed for a range of popular Cummins diesel engines, including the 6L, 6LT, L8.9, C8.9, ISC, and ISL series. As a critical component for engine overhaul and repair, this comprehensive set includes all necessary gaskets and seals to restore compression, prevent leaks, and ensure optimal engine performance.

Manufactured by, this kit provides a reliable, cost-effective alternative to OEM parts without compromising on fit or durability. The kit is commonly used in demanding applications such as excavators, loaders, bulldozers, trucks, and buses, making it an essential part for heavy equipment maintenance and repair shops worldwide.

Each gasket is precision-engineered to meet OEM specifications, ensuring a perfect seal and long service life under high pressure and temperature conditions. Whether you are rebuilding a stationary generator or a mobile construction vehicle, this kit offers the confidence of a complete, one-box solution for your engine gasket replacement needs.

Key Features & Benefits

• Comprehensive Coverage: Includes all critical gaskets (head gasket, valve cover, oil pan, intake/exhaust manifold, etc.) for a complete engine reseal in one convenient package.
• OEM Quality Fitment: Manufactured to original specifications with exact dimensions, bolt hole alignment, and material composition to match the Cummins 6L/ISC/ISL engine series.
• High Durability Materials: Constructed from multi-layer steel (MLS) for head gaskets and premium rubber/cork composites for other seals, providing resistance to extreme heat, pressure, and chemical exposure.
• Reduced Downtime: The “all-in-one” kit eliminates the need to source individual gaskets, simplifying inventory management and speeding up repair times for workshops.
• Versatile Application: Suitable for a wide range of heavy equipment including excavators, loaders, bulldozers, trucks, and buses powered by the specified Cummins engines.
• Rigorous Quality Control: Each kit undergoes outgoing inspection and machinery test reporting to verify sealing integrity and dimensional accuracy before shipment.

Technical Specifications

OEM Cross-Reference

This gasket kit directly replaces the following genuine Cummins part numbers. It is also compatible with various aftermarket references:

• Primary OEM Numbers: 4089958, 4089978, 4089889
• Alternative References: 4089960, 4089961, 4089962 (for specific sub-kits or variations)
• Engine Series Compatibility: ISC (Interact System C), ISL (Interact System L), L8.9, C8.9, 6L, 6LT

Note: Always verify your engine serial number and existing gasket configuration to ensure correct match. Our OEM service can assist with cross-referencing for unique engine builds.

Compatibility

This full gasket set is commonly used for the following engine and vehicle applications. Fitment is inferred based on standard OEM specifications for the listed engine models.

• Engine Models: Cummins 6L, 6LT, L8.9, C8.9, ISC, ISL
• Vehicle/Equipment Applications: Forklift, Excavator, Truck, Loader, Bulldozer, Bus, Agricultural tractors, Generator sets

Important: This kit is designed for the above engine families. It may not be suitable for all variants. Please confirm your engine type and year of manufacture before purchase.

Global Supply & Distribution

We offer worldwide shipping from our distribution hub in Guangdong, China, with additional sourcing capabilities from Japan. Our logistics network ensures fast and reliable delivery to major industrial centers across:

• North America: Los Angeles, Houston, Chicago, Toronto
• Europe: Rotterdam, Hamburg, Antwerp, Felixstowe
• Asia-Pacific: Singapore, Dubai, Sydney, Shanghai
• Middle East & Africa: Jebel Ali, Durban, Lagos

We maintain stock levels for high-demand parts to ensure quick dispatch. For bulk orders, we offer consolidated shipping to reduce freight costs. Our team has extensive experience in international trade, customs documentation, and export compliance.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities with strict adherence to OEM tolerances.
• Testing: Each batch undergoes machinery test reports and video outgoing inspections to verify sealing performance and dimensional accuracy.
• Warranty: 6-month warranty against manufacturing defects. Claims are processed quickly with replacement or refund options.
• Material Certification: Raw materials are sourced from certified suppliers with traceability documentation.

FAQ

Q: How do I confirm this gasket kit fits my specific Cummins engine?
A: Verify your engine’s model number (e.g., ISC, ISL, 6L) and serial number. Cross-reference your existing gasket part numbers with the OEM numbers listed (4089958, 4089978, 4089889). If uncertain, contact our support team with your engine details for a precise match.

Q: What is included in a “Full Gasket Kit”?
A: This kit includes all upper and lower engine gaskets and seals required for a complete overhaul, such as the cylinder head gasket, valve cover gasket, oil pan gasket, intake/exhaust manifold gaskets, front and rear main seals, and various O-rings. It does not typically include pistons, rings, or bearings.

Q: Can I install this kit myself, or do I need a professional mechanic?
A: While experienced DIY mechanics can perform the installation, we recommend professional installation by a certified diesel technician. Proper torque sequences and surface preparation are critical for gasket longevity. Incorrect installation may void the warranty.