Honda Valve Cover Gasket 12391-ZE2-020 GX270 GX340 GX390 GX670 EB6500 12391-ZE2-020 12391ZE2020 12391 ZE2 020
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Product details
Honda Valve Cover Gasket 12391-ZE2-020 GX270 GX340 GX390 GX670 EB6500 12391-ZE2-020 12391ZE2020 12391 ZE2 020.
Stop Cylinder Head Oil Leaks & Protect Valvetrains: Genuine Honda Valve Cover Gasket
Eliminate burning oil smoke, weeping cylinder heads, low-oil engine shutoffs, and dirt buildup around your rocker arms. This Genuine Honda Factory OEM Valve Cover Gasket (Part Number 12391-ZE2-020) is the authentic sealing element engineered explicitly for Honda GX240, GX270, GX340, GX390 single-cylinder engines and GX610, GX620, GX670, GXV610, GXV620, GXV670 V-Twin commercial powerheads . Servicing or adjusting valve lash on a commercial Honda engine and reusing an old, heat-flattened gasket almost always results in immediate oil seepage across the cylinder block.
Manufactured in Japan to Honda's precise factory blueprints, this gasket is engineered from heat- and oil-resistant elastomeric composite material designed to withstand high cylinder head temperatures without shrinking or extruding. Its engineered cross-section provides positive, uniform seal compression across the valve cover perimeter, sealing tightly against the machined aluminum cylinder head face with modest bolt torque. Whether you are performing routine 100-hour valve clearance checks, replacing rocker arms, or completing a full top-end rebuild, this factory original gasket guarantees a clean, leak-free seal right out of the package.
This authentic factory replacement component is cataloged under Honda OEM Part Number 12391-ZE2-020 (12391ZE2020 / Gasket, Head Cover / Valve Cover Packing / Rocker Cover Gasket) .
Why This Genuine Honda 12391-ZE2-020 OEM Gasket is the Pro Standard:
100% Genuine Factory OEM Component: Precision-molded in Japan to exact Honda factory tolerances for an exact drop-in perimeter fit on the cylinder head.
Thermal & Oil Degradation Resistance: High-grade elastomeric compound resists hardening, cracking, and oil breakdown under sustained heavy-load operation.
Positive Recovery & Memory: Resilient sealing profile compresses evenly to conform to minor surface imperfections without requiring messy RTV sealant.
Essential for Valve Lash Adjustments: Direct factory replacement needed whenever removing the valve cover to inspect or adjust intake and exhaust valve clearances.
Broad Fleet Application: Covers dozens of Honda commercial generator, water pump, snowblower, and industrial engine platforms.
Technical Specifications:
Brand: Genuine Honda Engines (OEM Factory Original)
Part Number: 12391-ZE2-020 (12391ZE2020)
Component Type: Cylinder Head Valve Cover Gasket / Rocker Cover Packing
Application Location: Between Valve Cover and Cylinder Head
Material: Commercial-Grade Oil-Resistant High-Temp Elastomeric Composite
Country of Origin: Made in Japan
Condition: Brand New in Official Factory Honda Packaging
Guaranteed Equipment Model Compatibility Matrix:
Honda Commercial Engines:
GX240 Series: GX240, GX240K1, GX240R1, GX240R2, GX240RT1, GX240RT2, GX240U1, GX240U2, GX240UT1, GX240UT2.
GX270 Series: GX270, GX270R, GX270RT, GX270RT2, GX270T, GX270T2, GX270U, GX270U2, GX270UT, GX270UT2.
GX340 Series: GX340, GX340K1, GX340R1, GX340R2, GX340RT1, GX340RT2, GX340U1, GX340U2, GX340UT1, GX340UT2.
GX390 Series: GX390K1, GX390K2, GX390R1, GX390R2, GX390RT1, GX390RT2, GX390T1, GX390T2, GX390U1, GX390U2, GX390UH1, GX390UT1, GX390UT2.
GX / GXV V-Twin Series (Requires 2 for complete engine service): GX610K1, GX610R1, GX610U1, GX620K1, GX620R1, GX620U1, GX670, GX670R, GX670U, GXV610K1, GXV610R1, GXV610U1, GXV620K1, GXV620R1, GXV620U1, GXV670, GXV670R, GXV670U.
Honda Industrial & Commercial Generators:
Fits EB Series: EB3500X, EB3500XK1, EB3800X, EB4000X, EB5000I, EB5000X, EB5000XK1/K2/K3, EB6500SX, EB6500X, EB6500X1, EB7000I, EB11000K1.
Fits EG Series: EG3500X, EG3500XK1, EG4000CL, EG5000CL, EG5000X, EG5000XK1, EG6500CL.
Fits EM Series: EM3500SX, EM3500SXK1, EM3500X, EM3800SX, EM4000SX, EM5000IS, EM5000IS1, EM5000SX, EM5000SXK1/K2/K3, EM5000X, EM6000GP, EM6500SXK1/K2, EM7000IS.
Fits EU / EN / EX / EZ Series: EU6500IS, EU6500IS1, EU7000ISN, EN3500, EN5000, EX3300S, EX3300SK1, EX4500S, EX4500SK1, EXW171S, EZ3500, EW140, EW171, EW171K1.
Specifications
- Engine Type: 4-Stroke
- Type: Valve Cover Gasket
- Power Source: Gasoline
- Model: GX270, GX340, GX390, GX670
- Country of Origin: Japan
- Fuel Type: Petrol
- Product Line: Honda GX
Condition: New