Description
Overview:
This is a Genuine Honda head gasket for GX340T2 and GX390T2 family engines, supplied to the original equipment specification under part number 12251-Z5T-003. The gasket sits between the cylinder block and the cylinder head to seal the combustion chamber and oil passages, preventing compression loss and seepage. Built from a durable, heat‐resistant, metal‐reinforced gasket material with a precision fire ring around the bore, it copes with thermal cycling and high pressure in hard‐working industrial engines. Designed for Honda GX340T2 and GX390T2 petrol engines commonly used in construction and garden machinery, it restores reliable top‐end sealing after overhaul or repair and supports stable power output and easy starting. Genuine status ensures consistent fit and performance without modification.
Key Features:
- Genuine Honda OEM part for assured compatibility and lifespan
- Exact fit for GX340T2 and GX390T2 series (including GX390UT2), no alterations needed
- Metal‐reinforced, heat‐resistant construction for dependable sealing under load
- Maintains compression and power by preventing combustion blow‐by
- Helps reduce oil misting and seepage at the head joint
- Precisely cut oil and pushrod passages for correct engine function
- Stable clamp load retention to handle repeated heat cycles
- Clean edges and accurate dowel alignment for straightforward installation
- Suitable for full rebuilds or routine top‐end service work
- Backed by Honda's manufacturing quality for reliability in daily use
Typical Applications:
Used when rebuilding or servicing Honda GX340T2/GX390T2 engines found on generators, plate compactors, cement mixers, water pumps, pressure washers, tillers, log splitters, and similar equipment. Ideal after overheating, loss of compression, or when restoring performance on hard‐worked site and garden machines.
Also known as:
Cylinder head gasket, top‐end gasket, head sealing gasket, head joint, engine head seal, combustion seal, head shim, head‐to‐barrel gasket.
Fits Models:
GX340T2, GX390T2, GX390UT2
Alternate Part Numbers:
12251-Z5T-003, 12251Z5T003
Product Specifications
| L&S Part No. | 12251 Z5T 003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 12251Z5T003 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Honda |
| Key Features | - Genuine Honda OEM part for GX340T2 and GX390T2 engines - Metal-reinforced, heat-resistant construction for reliable sealing - Prevents compression loss and oil seepage at the head joint - Precisely cut passages ensure correct engine function - Suitable for rebuilds or routine top-end service work |
| Fits Models | GX340T2 (GCBFT) | GX390UT2 (GCBCT) | GX390T2 (GCBDT) |
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