Description
Overview:
This Connecting Rod Bolt Locking Washer is a genuine Villiers OEM part for classic J.A. Prestwich engines. Made from durable steel, it secures the connecting rod bolts to help prevent loosening under vibration and heat cycles, protecting the big-end assembly and overall engine reliability. It is designed for period-correct fitment on JAP 4 and JAP 5 engines, and is also suitable for JAP 3. Supplied as unused old stock, it retains original factory specification and is ideal for authentic restorations and maintenance of vintage machinery powered by JAP engines, such as stationary equipment, horticultural machines, and light industrial plant. Manufacturer Part Number (MPN): 22748/2. This is part of our remaining last stock and is intended to keep classic engines running safely and as originally engineered.
Key Features:
- Genuine Villiers OEM part for JAP 3/4/5 engines, ensuring correct specification and fitment
- Robust steel construction for dependable clamp integrity under vibration and thermal cycling
- Helps maintain bolt preload on the big-end, reducing wear and the risk of movement
- Engineered profile suits the connecting rod bolt arrangement for secure locking
- Straightforward to install during rebuilds or strip-downs with standard workshop tools
- Unused old stock; original quality with minor age-related marks from storage only
- Supports accurate, period-correct restorations and long-term service reliability
- Works with original hardware; no modifications to rods, caps, or bolts are typically required
Typical Applications:
Used during big-end rebuilds and servicing of JAP 3, JAP 4, and JAP 5 engines in generators, compressors, pumps, small plant, horticultural machinery, and classic motorcycles. Ideal when replacing connecting rod bolts, re-torquing assemblies, or completing a full bottom-end overhaul to retain bolt security and preserve engine longevity.
Also known as:
Tab washer, con-rod bolt washer, big-end lock plate, retaining washer, con-rod securing washer, big-end tab, connecting rod bolt retainer.
Fits Models:
JAP 3, JAP 4, JAP 5
Alternate Part Numbers:
22748-2, 22748 2, 227482
