Cum mins 4089478 4025157 Cylinder Head Gasket Set M11 QSM11 ISM11 L10 Upper Gasket

Product Overview

Compatible Engine & Equipment Applications

• Heavy-Duty Highway Trucks: Freightliner, International, Kenworth and Peterbilt semi-trucks equipped with M11/ISM11 diesel engines
• Construction Machinery: Large loaders, excavators, road rollers and off-road engineering machinery powered by QSM11 engines
• Industrial Generator Sets: Stationary industrial generators, emergency power supply units and continuous-operation power equipment
• Special Engineering Equipment: Large water pump units, air compressors and heavy-duty industrial mechanical power systems

Official OEM Part Numbers

Kit Components List

• Reinforced thickened MLS multi-layer steel cylinder head gasket, anti-blowout and ultra-high pressure resistant
• Full set of high-temperature resistant valve stem oil seals, anti-aging and oil-leakage proof
• Heavy-duty reinforced valve cover gasket and upper engine auxiliary sealing cushions
• Precision-fit intake manifold and exhaust manifold sealing gaskets
• Cooling system upper gaskets and high-temperature coolant passage sealing rings
• Turbocharger mounting gaskets and high-pressure resistant auxiliary O-rings
• All matched upper engine paper gaskets, rubber seals and precision sealing components

Key Features & Advantages

• 100% OEM Exact Fit & Easy Installation: Manufactured strictly according to Cum mins original factory specifications and precision tolerance standards. This M11 upper gasket set supports direct bolt-on installation without cutting, grinding or modification, perfectly matching stock M11, ISM11 and QSM11 engines, effectively avoiding installation errors and sealing gaps.
• Ultra-Strong High Pressure & Temperature Resistance: Adopts upgraded thickened MLS steel composite structure and imported high-temperature resistant polymer materials. It is professionally optimized for M11 10.8L high-power engines, effectively resisting extreme combustion pressure and long-term high-temperature operation, completely solving common  points such as head gasket rupture, cylinder blowing and coolant leakage.
• Excellent Harsh Environment Durability & Anti-Aging Performance: All sealing parts feature premium oil resistance, corrosion resistance, compression resilience and anti-fatigue properties. It maintains stable and consistent sealing performance under long-term high-vibration, heavy-load and continuous 24-hour operation, greatly reducing frequent maintenance caused by aging and seal failure.
• Complete Professional Top-End Repair Solution: This all-in-one upper gasket kit integrates all required top-end sealing parts, covering full upper engine overhaul demands. It thoroughly fixes typical faults including insufficient cylinder compression, engine power drop, overheating, air leakage and valve system oil seepage, realizing one-time complete engine restoration.
• High Cost-Performance & Downtime Reduction: Effectively restores the original power output, fuel economy and operational stability of Cum mins M11 series engines. It eliminates repeated repair failures, reduces equipment downtime and maintenance costs, and significantly extends the service life of heavy-duty diesel engines.

Important Compatibility Notes

Warranty & Service