Cylinder head cover is suitable for Yuchai engine diesel engine parts cylinder head cover

Cylinder Head Cover for Yuchai Diesel Engine Parts

The cylinder head cover (also known as the valve cover or rocker cover) is the aluminum or pressed steel lid bolted to the top of the cylinder head that encloses the rocker arms, valve springs, and upper valve train — and contains the oil mist generated by the moving valve train components. This replacement cover is manufactured for Yuchai YC4 and YC6 series diesel engines — the widely used Chinese power platform in construction machinery, forklifts in the 2-7T range, generator sets, and truck applications. A cracked, warped, or leaking head cover causes oil seepage onto the exhaust manifold creating a fire hazard, oil loss, dirt ingress into the valve train, and potential engine damage from debris contamination.

The cover is cast from aluminum alloy or stamped from steel sheet, with a precision-machined gasket flange surface that ensures uniform compression of the rubber or cork head cover gasket along its entire perimeter. The gasket groove or rail is dimensioned to OEM specifications for reliable oil sealing across the full engine operating temperature range. Bolt holes are reinforced with steel inserts in aluminum covers to prevent thread stripping and ensure consistent gasket compression at every fastener location. The oil filler cap boss and breather/PCV port are positioned to match the Yuchai OEM configuration.

This head cover is a direct replacement for Yuchai YC4A, YC4B, YC4D, YC4E, YC4F, YC4FA, YC4G, YC6A, YC6B, YC6C, YC6G, YC6J, YC6L, and YC6M series diesel engines used in HELI, Hangcha, and other Chinese forklifts, as well as construction machinery and generator sets. For engine service, replacing the head cover when the sealing surface is damaged or when oil leaks persist after gasket replacement ensures a permanent seal. Installation requires proper gasket positioning, even bolt torque in the correct sequence, and avoidance of overtightening.

Kingstream supplies OEM-grade engine components with dimensional inspection. Browse our forklift engine parts for cylinder head covers, gaskets, valve train components, and complete engine sealing kits. Worldwide shipping available.

Technical Specifications

• SKU: YC4FA-CYL-COVER
• Product Type: Cylinder Head Cover / Valve Cover
• Engine: Yuchai YC4 / YC6 series diesel
• Material: Cast aluminum alloy / stamped steel
• Application: Valve train enclosure and oil sealing

Compatible Engine Applications

Stop oil leaks and protect your valve train from contamination. The Yuchai cylinder head cover ships from stock with dimensional inspection. Worldwide delivery from Kingstream.