WESPC Valve Cover Gasket 3681A049 For Perkins 1004-4 1004-40 T 1004-42 1004-4T

WESPC Valve Cover Gasket 3681A049 For Perkins 1004-4 1004-40 T 1004-42 1004-4T

Application:

Valve Cover Gasket 3681A049 is a die-cut, graphite-reinforced nitrile-bound sealing element designed for the Perkins 1004-4, 1004-40/T, 1004-42 and 1006-6 four- and six-cylinder diesel families (4.4 L & 6.0 L). It is used on Massey Ferguson 2600/2700/3000 tractors, JCB 3CX back-hoe loaders, Manitou rough-terrain forklifts, Claas Dominator combines and 50 – 110 kVA generator sets. The gasket seals the aluminium rocker cover to the cast-iron cylinder head and must resist hot oil mist, vibration and thermal cycling from –30 °C to +180 °C, so it is replaced at every top-end overhaul.

Technical specifications:

The sheet measures 440 mm × 135 mm × 1.2 mm and is moulded from high-density fibre bonded with graphite-filled NBR; the inner perimeter is rope-edge bonded to prevent wick-through, while outer anti-slip ribs keep the gasket centred during cap-screw tightening. Compression set is <15 % after 168 h at 150 °C, and the material passes ASTM F104 oil-resistance and 1 000 h salt-spray tests. The gasket withstands 9 MPa combustion pulse and maintains lateral sealing pressure >6 MPa after 5 000 h service life.

Material & performance features:

The gasket is moulded from premium aramid-fibre / nitrile-rubber composite whose micro-embossed surface conforms to cast-iron cylinder-head and aluminium rocker-cover micro-finish; the inner perimeter is rope-edge reinforced to block oil wick-through, while the outer anti-slip ribs keep the part centred during cap-screw tightening; silicone locator pips allow one-hand “hang-and-press” assembly, eliminating the need for additional sealant or retorque after initial heat cycle, and the material meets ASTM F104, SAE J90 and ISO 6310 oil-resistance standards for heavy-duty diesel applications.

Interchange part numbers:

Perkins 3681A049, 3681E049, U5LT1202, U5LT0317, Massey Ferguson 4224452M91, JCB 320/09337, Landini 747602M91.

WESPC(Dongguan)Tech Co., Ltd. is a wholly-owned subsidiary of WESPC Hong Kong.

The company has long been deeply engaged in the Perkins aftermarket spare parts sector, while also covering a wide range of multi-brand engines and related components. With years of professional expertise and a solid reputation, WESPC provides customers with diverse, one-stop solutions tailored to their needs.

Leveraging the global vision of its Hong Kong headquarters and the strategic location advantages of Dongguan, WESPC Dongguan is committed to building a highly efficient and reliable supply chain system, supported by professional technical expertise and comprehensive after-sales services, to continuously create greater value for its customers.

Looking ahead, the company will continue to expand its business landscape, keep pace with industry trends, and consistently enhance product and service quality—working hand in hand with global partners to achieve mutual growth and success.