Description
Overview:
The Valve In/Ex for JAP Models 5 and 55CB is a cylinder head poppet valve used to control gas flow during the intake and exhaust strokes in JAP industrial engines. Manufactured from heat-treated alloy steel for high-temperature strength and wear resistance, it helps maintain correct timing, compression, and overall engine efficiency. This is a Genuine JAP part, supplied to the original specification under OEM No. 21628, and is suitable for use as an inlet or exhaust valve where specified for these engines. Designed for small plant and machinery powered by JAP units, it supports reliable running in applications such as mixers, compactors, pumps, and other light industrial equipment. A direct-fit component for maintenance and engine rebuilds, it restores consistent sealing performance and dependable service life.
Key Features:
- Genuine JAP part for assured fit and quality (OEM No. 21628)
- Engineered from heat-treated alloy steel for durability and heat resistance
- Precision seating face for reliable sealing, compression, and power delivery
- Suitable for inlet or exhaust position as specified for JAP Models 5 and 55CB
- Direct replacement to factory dimensions for straightforward fitting
- Helps reduce blow-by and improves starting and idle stability
- Compatible with standard valve guides, springs, and retainers for these engines
- Ideal for routine overhauls, restorations, and preventive maintenance
- Supports long service intervals when used with correct lubrication and clearances
- Supplied as a single valve; other valve-train components are not included
Typical Applications:
Used in JAP Model 5 and 55CB industrial engines found in small plant and machinery such as site mixers, plate compactors, stationary pumps, compressors, and vintage equipment. Suitable for engine rebuilds, top-end overhauls, and routine maintenance where restoring correct valve sealing and timing is required for dependable day-to-day operation.
Also known as:
Inlet valve, exhaust valve, engine valve, poppet valve, IN/EX valve, cylinder head valve, JAP 21628 valve, JAP Model 5 valve, 55CB engine valve. Commonly referenced as a replacement valve for JAP industrial engines within classic plant and machinery maintenance.
Fits Models:
5, 55CB
Alternate Part Numbers:
21628
Product Specifications
| L&S Part No. | 21628 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 21628 |
| Unit of Sale | 1 |
| Machine Type | Engine |
| Fits Brands | JAP |
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