Description
Overview:
The Cylinder Head, OEM No. 22078, is a Genuine JAP part for the JAP 2-series industrial petrol engines, specifically the JAP 2A and 2S. Cast from high‑grade iron with precision‑machined faces, it seals the combustion chamber, supports the valve gear, and manages heat transfer for reliable running. This direct‑fit head restores compression and efficiency on ageing engines used in plant, pumps, generators, and other industrial machinery. Built to JAP’s original specifications, it offers a durable replacement when your existing head is cracked, warped, or beyond re-facing. Ideal for routine overhaul or full rebuilds, it helps maintain easy starting, stable idle, and consistent power output on JAP 2-series equipment.
Key Features:
- Genuine JAP OEM part (22078) for assured fit and build quality
- Cast iron construction for strength, heat stability, and long service life
- Precision‑machined gasket surfaces to maintain compression and prevent leaks
- Direct replacement to OEM specification; no modifications expected on standard engines
- Supports correct valve seating and rocker gear alignment
- Enhances engine efficiency, starting, and longevity after overhaul
- Suitable for routine maintenance or full engine rebuilds
- Typically fitted using standard head gasket and torque sequence for the JAP 2-series
Typical Applications:
Used on JAP 2-series industrial engines powering compactors, small plant, stationary pumps, generators, saw benches, and similar machinery. Ideal when refurbishing engines with damaged, corroded, or warped heads to restore reliable compression and cooling performance.
Also known as:
Cylinder head casting, engine head, head assembly for JAP 2-series, JAP 2A cylinder head, JAP 2S head.
Fits Models:
JAP 2A, JAP 2S
Alternate Part Numbers:
22078
Product Specifications
| L&S Part No. | 22078 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 22078 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Fits Models | JAP 2 |


