L10 M11 QSM11 Diesel Engine Bottom Gasket Lower Gasket Set 4089998 4089479 3800704 3804749

Product Overview

Compatible Engine & Equipment Applications

• Heavy-Duty Highway Semi-Trucks: Freightliner, International, Kenworth, Peterbilt and other heavy trucks equipped with M11/ISM11 diesel powertrains
• Large Construction Machinery: Heavy loaders, road graders, off-road dump trucks and engineering machinery powered by QSM11 industrial engines
• Industrial Power Generation Units: Stationary generator sets, emergency power supply equipment and continuous-operation industrial diesel power systems
• Special Heavy-Duty Equipment: Large water pump units, industrial air compressors and heavy mechanical supporting power devices

Official OEM Part Numbers

Kit Components List

• Heavy-duty crankshaft front & rear high-pressure oil seals, anti-leakage and wear-resistant
• Reinforced full-size oil pan gasket, high-tensile and anti-deformation for long-hour vibration scenarios
• Complete timing cover sealing gaskets and anti-leakage O-ring sets
• Crankcase bottom sealing gaskets and cylinder block auxiliary seal rings
• Liner sealing rings and bottom cooling system auxiliary gaskets
• Lower engine oil passage sealing gaskets and pressure-resistant rubber cushions
• All matched bottom-end paper gaskets, rubber seals and precision sealing components

Key Features & Advantages

• 100% OEM Precise Fit & Tool-Free Modification: Manufactured strictly in accordance with Cum mins original factory specifications and precision tolerance standards. This M11 lower gasket set supports direct bolt-on installation without cutting, grinding or secondary modification, perfectly fitting stock M11, ISM11 and QSM11 engines, effectively eliminating assembly gaps and hidden leakage risks.
• Superior Anti-Vibration & Anti-Leakage Performance: Adopts upgraded high-tensile composite paper and oil-resistant fluororubber materials, specially optimized for M11 engine’s high-vibration and high-oil-pressure operating environment. It effectively resists long-term mechanical vibration and oil pressure impact, thoroughly solving common bottom-end faults such as crankshaft seal oil leakage and oil pan seepage that are prone to recurrence.
• Industrial-Grade Anti-Aging & Durability: All sealing accessories feature excellent oil corrosion resistance, compression resilience and high-temperature stability. They maintain stable sealing performance under long-term heavy-load operation, high engine temperature and harsh working conditions, avoiding seal aging, hardening and failure caused by long-hour operation, greatly extending bottom-end maintenance cycles.
• Complete Bottom-End One-Stop Repair Solution: This all-in-one lower gasket kit integrates all sealing parts required for full bottom-end overhaul, covering crankshaft, oil pan, timing cover and crankcase full sealing positions. It completely fixes typical lower engine problems including slow oil seepage, severe oil leakage and crankcase pressure escape, realizing one-time thorough repair.
• Significantly Reduce Maintenance Costs & Downtime: Effectively solves recurring bottom-end oil leakage failures of M11 series engines, avoiding repeated disassembly and repair. It reduces equipment downtime loss and daily maintenance costs, fully restoring engine bottom-end sealing stability and operational reliability for heavy-duty equipment.

Important Compatibility Notes

Warranty & Service

Cum mins M11 lower gasket sets. Every kit undergoes strict multi-process factory inspection on material elasticity, compression resistance, dimensional accuracy and sealing stability, providing reliable and long-lasting bottom-end sealing protection for heavy-duty trucks, construction machinery and industrial generator sets.