Description
Overview:
The Cylinder Head Stud for JAP 4/3 Engine is a genuine JAP component (Manufacturer Part Number 12864) used to clamp the cylinder head securely to the engine block. Made from durable metal and supplied as unused old stock, it provides an authentic, like-for-like replacement for vintage machinery. This stud is designed for correct fit and clamping strength in classic stationary engines such as the JAP 3 and JAP 4, helping maintain compression, prevent head gasket leaks, and keep the top end correctly aligned. It is suitable for restoration, refurbishment, or routine service of older equipment where originality and reliability matter. Due to age, minor tarnish or storage marks may be present, which does not affect performance once fitted.
Key Features:
- Genuine JAP part for correct specification and reliable fitment
- Durable metal construction for consistent clamping force under heat and load
- Unused old stock for period-correct restoration and maintenance
- Direct replacement for worn, stretched, or damaged original studs
- Helps maintain head gasket sealing and accurate cylinder head alignment
- Compatible with original nuts and washers; use with new gasket for best results
- Suitable for vintage stationary engines found in tools such as mixers, pumps, and generators
- Cost-effective way to prolong engine life while preserving authenticity
- Clean threads for straightforward assembly; torque using the manufacturer's service data
- Ideal for long-term upkeep of classic JAP engines in working or display condition
Typical Applications:
Used during cylinder head installation or overhaul on vintage JAP engines in equipment such as small plant, compressors, generators, and garden or workshop machinery. Common in maintenance tasks where the head has been removed for decarbonising, gasket replacement, valve work, or block repairs. Suitable for restorers bringing original engines back to service, and for operators keeping older machines running safely and reliably.
Also known as:
Engine stud, cylinder head stud bolt, head fixing stud, cylinder head fastener, head stud bolt, cylinder bolt, cylinder head screw, top-end stud, OEM head stud. These terms are often used when referring to the threaded fastener that secures the cylinder head to the engine block on vintage engines.
Fits Models:
JAP 3, JAP 4
Product Specifications
| L&S Part No. | 12864 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| OEM No. | 12864 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | JAP |
| Key Features | - Genuine JAP part ensures correct specification and fitment - Durable metal construction for consistent clamping force - Unused old stock suitable for period-correct restoration - Direct replacement for worn or damaged original studs - Compatible with JAP 3 and JAP 4 engines |
| Fits Models | JAP 4, 3 |
