Description
Overview:
This genuine JAP Valve Guide (OEM No. 5408) is a durable metal guide for the inlet and exhaust valves on vintage JAP 4/3 engines, commonly found in small plant and stationary equipment. It accurately supports the valve stem to maintain alignment, reduce wear, and help preserve compression and smooth running. Suitable for JAP 3 and JAP 4 models, it is an unused old-stock part that may show minor age-related marks consistent with its period. Key dimensions are Length: 51 mm (2 inches), Outer Diameter: 12.8 mm, and Inner Diameter: 8.6 mm, giving a precise fit for correct valve clearance and operation. Ideal for restorers and service technicians maintaining original specification on classic JAP engines.
Key Features:
- Genuine JAP part for correct fit and performance (OEM No. 5408)
- Suitable for both inlet and exhaust positions on JAP 4/3 engines
- Durable metal construction for long service life in vintage applications
- Precise dimensions: Length 51 mm (2 inches), O/D 12.8 mm, I/D 8.6 mm
- Maintains valve stem alignment to minimise wear and oil consumption
- Helps preserve compression and stable idle/running characteristics
- Unused old stock with period-correct finish; may show light storage ageing
- Straightforward press-fit installation with standard workshop tools
- Consistent guide sizing supports accurate valve-to-guide clearances
- Suitable for engine overhauls, rebuilds, and preventative maintenance
Typical Applications:
Used during cylinder head rebuilds or refurbishments on JAP 3 and JAP 4 stationary engines to replace worn guides causing valve play, smoke, or loss of compression. Common in classic small plant such as pumps, generators, cement mixers, compressors, and cultivators where JAP engines were originally fitted.
Also known as:
Valve guide bush, valve stem guide, guide bush, valve sleeve, inlet valve guide, exhaust valve guide, J.A. Prestwich 5408 guide.
Fits Models:
JAP 3, JAP 4, JAP3, JAP4
Alternate Part Numbers:
5408
Product Specifications
| L&S Part No. | 5408 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 5408 |
| Unit of Sale | 1 |
| Applications | JAP 3, JAP 4, JAP3, JAP4 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Fits Models | JAP 4, 3 |
