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Upper Engine Gasket Set Complete Top End Overhaul Seal Kit
Product Overview
Our Cum mins NT855 STC Upper Engine Gasket Set is an upgraded heavy-duty top-end sealing solution specially engineered for Cum mins NT855 STC, NTA855 STC and Big Cam STC series 14L diesel engines. This professional upper overhaul gasket kit covers all OEM-matched top-end sealing parts required for cylinder head replacement, valve train service, manifold repair and complete upper engine in-frame overhaul. Designed exclusively for STC (Step Timing Control) engine structures, it perfectly solves common STC engine points including cylinder head gasket blowout, high-temperature coolant leakage, intake/exhaust air leakage, valve cover oil seepage and compression pressure loss. Adopting reinforced high-temperature resistant MLS composite and anti-fatigue rubber materials, this NT855 STC upper gasket set delivers superior pressure resistance and thermal stability, effectively adapting to long-term heavy-load, high-temperature and high-vibration working conditions, and permanently fixes recurring top-end sealing failures.
Compatible Engine & Equipment Applications
This NT855 STC top end gasket set strictly follows OEM dimensional standards for 100% precise fit with all Cum mins NT855 STC, NTA855 STC and Big Cam STC diesel engines. It is a dedicated repair kit for STC timing control versions and not universal with non-STC Big Cam engines, widely applied in global heavy-duty industrial and commercial equipment:
Heavy-Duty Construction Machinery: Large loaders, motor graders, excavators, bulldozers and off-road mining equipment
Commercial Heavy Trucks: Class 8 heavy-duty semi-trucks and cargo transport vehicles equipped with NT855 STC powertrain
Industrial Power Generation: Stationary diesel generator sets, emergency power units and continuous-operation industrial power equipment
Marine & Special Machinery: Commercial marine auxiliary diesel engines and large agricultural heavy machinery
Official OEM Part Numbers
Item
OEM Part Number
Complete STC Upper Gasket Set
3801330 / 3801754
Alternative STC Top Overhaul Kit
3803982 / 4024919
STC MLS Cylinder Head Gasket
3801468
Kit Components List
This Cum mins NT855 STC upper gasket kit provides 100% complete STC-specialized top-end sealing accessories for full upper engine overhaul, no missing parts or additional purchases required. All components are customized for STC engine structural characteristics:
Reinforced MLS multi-layer steel cylinder head gasket, STC-version exclusive, anti-blowout and high-pressure resistant
High-temperature resistant valve cover gasket and buffer sealing cushions
Full set of heat-resistant valve stem oil seals for high-temperature operation
Upper engine cooling system gaskets and coolant passage sealing rings
STC mechanism auxiliary sealing gaskets and precision positioning gaskets
All matching upper engine paper gaskets, rubber O-rings and sealing accessories
Key Features & Advantages
STC Version Exclusive Precise Fit: This upper gasket set is professionally customized for Cum mins NT855 STC step timing control engine structure, perfectly matching STC-specific valve train and timing assembly parameters. It supports direct bolt-on installation without cutting or modification, solving the problem of ordinary gaskets failing to fit STC engines.
Superior High-Temperature & Anti-Blowout Performance: Adopting upgraded thickened MLS metal composite structure and high-temperature resistant materials, it effectively resists extreme combustion temperature and explosion pressure of NT855 high-power engines. It thoroughly avoids common failures such as head gasket bursting, cylinder pressure leakage and engine overheating caused by inferior gaskets.
Excellent Vibration & Fatigue Resistance: Optimized for long-term high-vibration operation of construction machinery, all sealing parts feature strong compression recovery and anti-deformation ability. It maintains stable sealing tightness under continuous heavy-load operation, preventing recurring air and oil leakage.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Ecer Certification：
Verified Supplier
Guangzhou Tianhe District Qianjin Yiling Machinery Parts Business Department, established in 2013, is a professional supplier focusing on high-performance engine repair kits and cylinder gaskets for construction machinery excavators, boasting solid capabilities in both standard product supply and cu... Guangzhou Tianhe District Qianjin Yiling Machinery Parts Business Department, established in 2013, is a professional supplier focusing on high-performance engine repair kits and cylinder gaskets for construction machinery excavators, boasting solid capabilities in both standard product supply and cu...
