6CT Cylinder Head 3973493 3936180 for Cummins Engine Parts Diesel

Product Details

Product Overview

This high-quality replacement cylinder head, identified by part numbers 3973493 and 3936180, is specifically engineered for the Cummins 6CT diesel engine platform. As a critical component of the engine’s top-end assembly, this cylinder head is designed to provide a precise seal for the combustion chamber while housing the valve train components. Manufactured to OEM specifications, it is a reliable solution for maintaining or restoring engine performance in demanding applications.

Ideal for use in construction machinery, industrial equipment, agricultural vehicles, generator sets, marine engines, and material handling equipment, this 6CT cylinder head offers a direct-fit replacement for worn or damaged units. Whether you are performing a complete engine overhaul or a targeted top-end repair, this component ensures structural integrity and consistent compression for your Cummins power unit.

Key Features & Benefits

• OEM Specification Fitment: Manufactured to match the exact dimensions and material composition of the original Cummins 6CT cylinder head, ensuring a seamless installation without modification.
• Durable Construction: Built from high-grade cast iron alloy, this cylinder head is designed to withstand extreme thermal cycles and high combustion pressures common in turbocharged diesel engines.
• Precision Machining: All critical surfaces, including the fire deck and valve seats, are machined to tight tolerances for optimal sealing and heat dissipation.
• Comprehensive Quality Control: Each unit undergoes a machinery test report and video outgoing inspection to verify structural soundness and dimensional accuracy before shipment.
• Enhanced Engine Performance: A properly functioning cylinder head restores compression, reduces blow-by, and improves fuel efficiency, extending the service life of your engine.
• Global Compatibility: Sourced as a reliable aftermarket component suitable for a wide range of Cummins 6CT-powered equipment operating in various climates and duty cycles.

Technical Specifications

OEM Cross-Reference

This cylinder head is a direct aftermarket replacement for the following original Cummins part numbers:

• 3973493 (Primary OEM Reference)
• 3936180 (Alternative OEM Reference)

Note: Always verify the casting number and application before purchase to ensure compatibility with your specific engine serial number.

Compatibility

This cylinder head is commonly used for the following applications:

• Engine Models: Cummins 6CT (6-cylinder turbocharged diesel)
• Equipment Types: Construction machinery (excavators, loaders), industrial compressors, agricultural tractors, generator sets, marine propulsion, and forklifts.

Fitment is inferred based on the OEM part number cross-reference. We recommend consulting your equipment’s service manual for exact application verification.

Global Supply & Distribution

We maintain a robust supply chain capable of shipping this 6CT cylinder head to buyers worldwide. Our logistics network supports fast delivery to major industrial hubs and ports across North America, Europe, Asia-Pacific, the Middle East, and South America. With extensive export experience in the heavy-duty aftermarket sector, we ensure proper packaging and documentation for international trade compliance. Whether you need a single unit for a field repair or bulk quantities for a fleet maintenance program, we can accommodate your delivery schedule.

Quality Assurance

Every cylinder head is manufactured in ISO-compliant facilities with strict adherence to material and machining standards. Each unit is tested to confirm dimensional accuracy and structural integrity, with a machinery test report and video inspection provided upon request. We back our product with a 6-month warranty against manufacturing defects, giving you confidence in your purchase. Our quality process includes:

• Material analysis for correct alloy composition.
• Pressure testing to ensure no internal cracks or porosity.
• Surface flatness inspection for proper head gasket sealing.

FAQ

Q: Will this cylinder head fit my specific Cummins 6CT engine?
A: This part is designed as a direct replacement for the Cummins 6CT engine family using OEM numbers 3973493 and 3936180. However, due to minor variations in engine serial numbers and casting revisions, we recommend comparing the casting number on your existing head with our part numbers. If you are unsure, please provide your engine’s serial number for verification before ordering.

Q: What should I inspect before installation?
A: Before installation, check the cylinder head for any shipping damage and verify the flatness of the fire deck using a straightedge. It is also critical to inspect the valve guides and seats for wear. We recommend using a new head gasket, new cylinder head bolts (torque-to-yield), and proper lubrication on all threads during reassembly to ensure a leak-free seal.

Q: How should I maintain this cylinder head after installation?
A: Routine maintenance includes monitoring engine coolant quality to prevent corrosion, following the manufacturer’s recommended torque sequence and specifications during installation, and checking for signs of exhaust gas leakage or coolant contamination during regular service intervals. Properly maintained, this cylinder head will provide a long service life under normal operating conditions.