WESPC Valve Cover Gasket U20996140 For Perkins T4.236 AT4.236 Diesel Engines

WESPC Valve Cover Gasket U20996140 For Perkins T4.236 AT4.236 Diesel Engines

Application:

U20996140 Valve Cover Gasket is engineered for the Perkins T4.236 and AT4.236 four-cylinder turbocharged diesel engines (3.9 L, 236 cu in) that power a vast range of agricultural tractors such as Massey Ferguson 265/275/285/290 and Landini 5500/5860, combine harvesters, telehandlers like JCB 530-70, skid-steer loaders, mobile generator sets and industrial compressors; the same gasket is also fitted to Clark material handlers, Manitou MLT 628 telehandlers and Fiat/Iveco light-duty trucks, making it a true cross-sector sealing solution that has to survive constant exposure to hot oil mist, vibration and thermal cycling from –30 °C arctic starts to +180 °C under-hood steady-state.

Technical specifications:

The die-cut profile measures 440 mm × 135 mm with a 1.2 mm compressed thickness, 3 mm sealing bead width and 415 mm × 112 mm bolt-hole pitch; it withstands 25 % compression and ≥40 % rebound, maintains ≥12 MPa tensile strength and ≥3.5 kN/m layer adhesion, passes 220 °C flash and 180 °C continuous oil ageing tests, and keeps lateral sealing pressure above 9 MPa after 168 h immersion in 15 % biodiesel blend, ensuring no measurable oil weep for at least 5 000 h service life on engines whose bore is 98.43 mm and whose piston carries a 2.46 mm top compression ring, a 2.38 mm second compression ring and a 4.96 mm three-piece oil control ring.

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 120996140, 120-9961-40, Massey Ferguson 3638721M91, Landini 747602M91, JCB 320/09337, Fiat/Iveco 4111A022.