WESPC Valve Cover Gasket 1820909C1 for Perkins 1300 Series Diesel Engines

WESPC Valve Cover Gasket 1820909C1 for Perkins 1300 Series Diesel Engines

Application:

Perkins 1300 Series Diesel Engines - Secondary application for Perkins 1306, 1306C, and 1306C-E87TAG3 six-cylinder diesel engines (12.5-18.0 L displacement) used in FG Wilson generator sets, industrial power units, and agricultural equipment . This usage is primarily documented in aftermarket cross-reference catalogs and kit assemblies (431254/1825602C91) 
.Perkins 403 Series Engines - Also appears in Perkins 403 engine parts documentation as a valve cover gasket component, though this may be a documentation reference rather than a primary application.

Technical specifications:

Weight: 0.5-1.15 lbs (0.23-0.52 kg) per gasket
Package dimensions: 36.0" × 12.0" × 1.0" (91.4 cm × 30.5 cm × 2.5 cm) - dimensional shipping weight applies 
Compressed thickness: 0.5mm (0.020 inches) for optimal seal and fit 
Material type: Cork-rubber composite or high-temperature NBR (nitrile butadiene rubber) with fiber reinforcement
Color: Typically black or dark gray
Operating temperature: -30°C to +150°C continuous, +180°C intermittent
Bolt pattern: Matches valve cover with 6-8 mounting bolt holes

Material & performance features:

Manufactured from high-temperature nitrile rubber (NBR) compound with 70-75 Shore A hardness, reinforced with synthetic fiber mesh to provide excellent compressibility recovery and prevent extrusion under bolt load (8-12 N·m typical torque). The material formulation includes anti-aging additives to resist hardening and cracking from prolonged exposure to engine oil (API CF-4 grade and higher), ozone, and thermal cycling.ISO9001 certified production processes ensure dimensional accuracy within ±0.5 mm on length/width and ±0.1 mm on thickness 
. The gasket maintains elastic recovery after 1,000+ hours of continuous compression at 150°C, preventing oil seepage common with inferior cork-rubber materials. Aftermarket versions from PAI Industries, Heavy Duty Pros, and KMP Brand provide 12-24 month warranty coverage and meet OEM oil resistance standards (<5% swell in ASTM No. 3 oil after 70 hours at 150°C) . 

Interchange part numbers:

Primary OEM: 1820909C1, 1820909C2 
Superseded by Kit: 1825602C91, 1825602C92 (valve cover gasket set) 
Kit component: 431254 (valve cover gasket kit) 
Individual component: 431255 (when kit not required) 
Cross-references: 4333-1820909C1, 4333-1825602C91 (Mack/Navistar format) 
Aftermarket: M-1825602C91, M1825602C91, AP0036 
PAI reference: PAI 431255 
KMP Brand: 1820909C1-KMP (18-month warranty)