Cummins M11 QSM11 Main and Con Rod Bearing Set MAHLE Engine Bearing 6 pcs

Product Details

Product Overview

This premium engine bearing set is specifically designed for the Cummins M11 and QSM11 diesel engines. Manufactured by MAHLE, a globally recognized leader in engine component technology, this set includes both main bearings and connecting rod bearings to ensure a complete overhaul solution. The bearings are manufactured to strict OEM specifications, providing the precise clearances and load-bearing capacity required for heavy-duty commercial applications.

Each bearing in this 6-piece set is engineered to withstand the high cylinder pressures and thermal stresses common in turbocharged diesel engines. Whether you are rebuilding an M11 engine for a Freightliner truck, a construction vehicle, or an industrial power unit, this bearing kit delivers the reliability and performance your customers demand. The bearings are precision-machined from high-strength aluminum alloy with a steel backing for superior fatigue resistance.

Key Features & Benefits

• Complete Bearing Set – Includes both main bearings and connecting rod bearings in a single package, simplifying inventory management and ordering.
• Precision Fitment – Engineered to match the exact OEM specifications for Cummins M11 and QSM11 engines, reducing installation time and risk of premature wear.
• Enhanced Load Capacity – Tri-metal construction (steel backing, copper-lead interlayer, and aluminum-tin overlay) provides superior load distribution and resistance to fatigue.
• Corrosion Protection – Special anti-corrosion coating applied to all bearing surfaces protects components during storage and initial engine operation.

Technical Specifications

OEM Cross-Reference

This MAHLE engine bearing set is designed to replace or serve as an alternative to the following OEM part numbers:

• Cummins OEM: 3088985, 3088986, 3088987, 3088988, 3088989
• MAHLE Part Numbers: MS 1890 (Main Bearing), CR 3450 (Connecting Rod Bearing)

Note: Always verify your engine’s specific bearing size (standard, 0.25mm, 0.50mm undersize) before ordering. This listing is for standard size unless otherwise specified.

Compatibility

This bearing set is commonly used for the following engine models and applications:

• Engine Models: Cummins M11, Cummins QSM11 (CELECT and CELECT Plus versions)
• Common Applications: Freightliner FLD, FLB, FLC; Kenworth T800, W900; Peterbilt 379, 378; International 9200, 9400i; and various construction equipment (Case, Komatsu, Hitachi) powered by these engines.

Fitment is inferred based on engine model. Please confirm your engine serial number and bearing size requirements before purchase.

Global Supply & Distribution

We maintain a robust global supply chain to ensure fast delivery to customers worldwide. Our major markets include:

• North America: Regular shipments to Los Angeles, Houston, New York, Toronto, and Vancouver ports.
• Europe: Direct distribution to Rotterdam, Hamburg, Antwerp, and Felixstowe.
• Asia-Pacific: Rapid delivery to Singapore, Dubai, Sydney, and major Chinese industrial centers.
• Middle East & Africa: Serving markets in UAE, Saudi Arabia, South Africa, and Nigeria.
• South America: Regular exports to Santos, Buenos Aires, and Valparaiso.

Our export team handles all international trade documentation, including commercial invoices, packing lists, and certificates of origin. We offer flexible shipping options including air freight, sea freight, and express courier services (DHL, FedEx, UPS).

Quality Assurance

• Manufacturing Standard: Bearings are produced under ISO 9001 and IATF 16949 certified facilities, ensuring automotive-grade quality control.
• Material Certification: Each batch is tested for hardness, microstructure, and dimensional accuracy per MAHLE’s global standards.
• Warranty: All products carry a 3-month warranty against manufacturing defects in material and workmanship.
• After Warranty Support: Our technical team provides online support for installation questions and troubleshooting beyond the warranty period.
• Packaging Integrity: Bearings are shipped in original MAHLE packaging, protected against moisture and physical damage during transit.

FAQ

Q: How do I determine if I need standard or undersize bearings for my Cummins M11?
A: Standard bearings are suitable for a crankshaft that has not been reground. If your crankshaft has been machined (typically 0.25mm or 0.50mm undersize), you will need corresponding undersize bearings. Always measure the crankshaft journal diameter and main bore housing diameter with a micrometer before ordering. If you are unsure, we recommend purchasing standard size and verifying fitment during teardown.

Q: Can these bearings be installed without special tools?
A: While basic hand tools can be used for installation, we strongly recommend using a bearing installation tool set to prevent damage to the soft bearing overlay. The main bearing caps must be torqued to OEM specifications (typically 120-130 ft-lbs for M11 main caps) using a calibrated torque wrench. Never use impact tools for final tightening as this can distort the bearing shells.

Q: What maintenance interval can I expect after installing these MAHLE bearings?
A: With proper installation and using the correct grade of engine oil (typically 15W-40 in most climates), these MAHLE bearings are designed to last the full engine overhaul interval of 500,000 to 800,000 miles (or 10,000-15,000 hours) in heavy-duty applications. Regular oil analysis every 250 hours of operation is recommended to monitor bearing wear and detect potential issues early.