3933370 3933370 01 Engine Valve Cover & Cylinder Head Fits Cummins 4BT 3.9L Komatsu S4D102

Short Description / Bullet Points

Exact Casting Standard:
100% engineered to match or exceed original factory casting marks 3933370 and 3933370 01.
Broad Engine Application:
Perfectly compatible with Cummins B-Series 3.9L 4BT, 4BTA 8-valve engines and Komatsu S4D102E, SAA4D102E crawler excavator engines.
Premium Heavy Duty Build:
Manufactured from premium-grade cast iron/alloy to withstand extreme thermal expansion, high vibration, and pressure in harsh industrial environments.
Flawless Sealing Protection:
Precision-machined bolt holes and gasket mating surfaces prevent oil leakage, protecting the internal valvetrain from external dust and sand.
Ready for Distribution:
Available for wholesale and fleet mechanics, backed by a comprehensive 12-month quality warranty.

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Technical Specifications Table

Technical Parameter	Specification Details
Product Name	Engine Valve Cover / Cylinder Head Component
Casting / OEM Part Number	3933370 / 3933370 01 / 3903920 / 3966448
Engine Compatibility	Cummins 4BT 3.9L, 4BTA 3.9, 4B Series & Komatsu S4D102E
Number of Valves/Cylinders	4 Cylinders / 8 Valves
Material Composition	High-strength Forged Cast Iron or Reinforced Steel
Primary Application	Commercial Trucks, Industrial Generators, Komatsu Excavators
Condition / Warranty	Brand New Premium Aftermarket / 1 Year Warranty

Detailed Description

Restore and maintain your industrial fleet's efficiency with our heavy-duty 3933370 01 Engine Valve Cover & Cylinder Head component. Precision-engineered strictly according to original Cummins B-Series specifications, this critical valvetrain housing guarantees a flawless airtight seal for the world-renowned Cummins 4BT 3.9L and 4BTA 3.9 engines.

Fabricated to survive the punishing environments of earthmoving, heavy transport, and continuous power generation, this component effectively eliminates oil weepage and keeps head pressure perfectly balanced. CNC-milled surfaces ensure a tight seal with the valve cover gasket, minimizing downtime and saving maintenance costs. Whether you are overhauling a Komatsu S4D102E crawler excavator engine or updating a 3.9L standby diesel generator set, our premium replacement parts offer OE-level security at an unbeatable aftermarket value.

Some Product Photos of Our Factory

3933370 3933370 01 Engine Valve Cover