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Cat® 309-6678 Engine Cylinder Head Intake Valve for C4.4, C6.6, and C7.1 Engines

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  2. Cat® 309-6678 Engine Cylinder Head Intake Valve for C4.4, C6.6, and C7.1 Engines
Cat® 309-6678 Engine Cylinder Head Intake Valve for C4.4, C6.6, and C7.1 Engines
Cat® 309-6678 Engine Cylinder Head Intake Valve for C4.4, C6.6, and C7.1 Engines

Ensure peak combustion efficiency with the Cat® 309-6678 Coated Intake Valve. Designed for C4.4, C6.6, and C7.1 engines, this high-temperature resistant valve provides reliable performance for Cat 320D2, 950GC, and D6K machinery. Precision-manufactured for long-term durability in heavy-duty B2B applications. Global export with fast shipping.

Technical Specifications 309-6678 - Coated Intake Valve for CAT C4.4/C7.1 Engines

309‑6678 Coated Intake Valve — High‑Temperature Wear‑Resistant Engine Air‑Intake Valve

The Cat® 309‑6678 Coated Intake Valve is a precision‑machined engine valve component specially designed for CAT C4.4, C6.6 and C7.1 diesel engines. With a high‑performance anti‑wear coating on the surface, it withstands high‑temperature combustion‑chamber environments and frequent opening‑closing impacts. It accurately controls air intake volume and timing, ensuring stable combustion efficiency and reliable power output for construction machinery engines.

1. Technical Specifications

Technical ParameterImperial SizeMetric Size
Part Number309‑6678309‑6678
Product TypeSurface‑Coated Engine Intake Valve
Overall Dimensions4.33 in × 1.38 in × 1.38 in110.0 mm × 35.0 mm × 35.0 mm
Applicable Engine ModelsCAT C4.4, C6.6, C7.1 Series Diesel Engines
Core FeatureHigh‑Temperature‑Resistant & Anti‑Wear Surface Coating
Core FunctionAir‑Intake Control & Combustion‑Chamber Sealing

2. Machine Compatibility

This OEM‑standard coated intake valve fits a wide range of CAT construction machinery powered by C4.4/C7.1 engines:

  • Excavators: 320, 320D2, 320GC, 323, 326, 330, 330GC, 333, 336GC

  • Wheel Loaders: 924K, 930K, 938K, 950GC, 950M, 962M

  • Dozers: D3K2, D4K2, D5K2, D6K2, D6N Track‑Type Tractors

  • Paving & Compaction Equipment: AP‑655D, AP1055 Pavers, CS‑56B/64B Rollers, CP‑54B Compactors

  • Industrial Power Units: C4.4/C7.1 Generator Sets & Mobile Hydraulic Power Stations

3. Key Features & Advantages

  • Excellent High‑Temperature Resistance: Special surface coating maintains stable structural rigidity and sealing performance under long‑term high‑temperature combustion‑chamber working conditions.

  • Anti‑Wear & Anti‑Carbon‑Deposit Coating: Premium wear‑resistant layer reduces friction loss, prevents carbon buildup, and extends service life of both intake valve and valve seat.

  • 1:1 OEM‑Precision Direct Replacement: Strictly manufactured to CAT original dimensional tolerances, ensuring perfect matching of valve timing and cylinder‑compression performance.

  • Improved Engine Combustion Efficiency: Precision‑machined air‑flow surface optimizes intake efficiency, promoting full fuel combustion and enhancing overall engine thermal efficiency.

Commercial Reference Information
Product: Engine Coated Intake Valve
Cross Part Number: 3096678
MOQ: 1 Unit
Warranty Period: 6‑12 Months

For bulk wholesale, technical consultation and engine‑valve component solutions:

Xuzhou Sinoswift Import & Export Co., Ltd.
Contact: +86 13701956981
Email: [email protected]

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