KTA19 QSK19 Intake Valve 3052820 diesel Engine Parts

Cummins KTA19 QSK19 Diesel Intake Valve 3052820

The diesel intake valve is a precision-engineered poppet valve that controls the admission of fresh air into the combustion chamber during the intake stroke of the Cummins KTA19 and QSK19 series heavy-duty diesel engines. Part number 3052820 is the OEM Cummins intake valve specified for these 19-liter inline-6 powerplants, which are found in Komatsu, Caterpillar, Hitachi, and Liebherr heavy construction equipment, mining trucks, and large-capacity forklifts. A worn, tuliped, or bent intake valve causes incomplete cylinder filling, reduced volumetric efficiency, black exhaust smoke at full load, and eventual compression loss across affected cylinders.

Each valve is forged from premium high-temperature alloy steel with a precision-ground stem and a hardened seat face. The valve head is designed with an optimized tulip profile for maximum airflow during the intake stroke, improving volumetric efficiency and combustion quality. The stem is chrome-plated and micro-finished for smooth operation within the valve guide, while the stem tip is induction-hardened to resist wear from the rocker arm or crosshead contact. All critical dimensions — stem diameter, head diameter, overall length, and seat face angle — are held to Cummins OEM specifications with 100% inspection.

This intake valve is specified for the Cummins KTA19 (19-liter, mechanically governed) and QSK19 (19-liter, electronically controlled) diesel engines used in Komatsu HD785/HM400 dump trucks, Caterpillar 785 mining trucks, Hitachi EX1200/EX1900 excavators, and select large-capacity Toyota and TCM forklifts with KTA-series Cummins power. For engine overhaul and cylinder head reconditioning, replacing all intake valves as a complete set ensures balanced airflow and uniform combustion across all six cylinders. Installation requires cylinder head disassembly, valve guide inspection, and proper valve seat grinding or replacement.

Kingstream supplies OEM-grade engine components with dimensional inspection and material certification. Browse our forklift engine parts for valves, piston kits, cylinder liners, gasket sets, and complete engine overhaul kits. For Cummins OEM cross-reference, visit Cummins Engines. Worldwide shipping available.

Technical Specifications

• Part Number: 3052820
• Product Type: Intake Valve (Poppet Type)
• Engine Platform: Cummins KTA19 / QSK19 (19L I6)
• Material: High-temperature forged alloy steel
• Stem Finish: Chrome-plated, micro-finished
• Head Profile: Tulip-type (optimized intake flow)
• Application: Diesel engine cylinder head intake port

Compatible Engine Platforms

Restore proper intake airflow and engine performance with OEM-grade quality. This diesel intake valve 3052820 ships from stock with dimensional inspection. Worldwide delivery from Kingstream.