Description
Overview:
The Valve Chest Cover is a genuine Villiers component for BSA industrial engines, designed to seal and protect the valve/tappet chest from dust, moisture, and debris. Manufactured from durable metal, it helps retain lubrication in the chest area and reduces the risk of contamination that can cause premature wear. This cover is a direct-fit part for BSA 320CC and BSA 420CC engines and is supplied to the original specification under OEM No. 86 1990. It is suitable for workshop repairs, routine servicing, and full engine rebuilds where the original cover is missing, bent, or corroded. Built to cope with engine heat and vibration in demanding site and agricultural environments, it supports reliable running and clean maintenance of the valve mechanism.
Key Features:
- Genuine Villiers part for assured compatibility and quality
- OEM No. 86 1990 for precise fit on BSA 320CC and 420CC industrial engines
- Robust metal construction for long service life in tough conditions
- Helps keep contaminants out and lubrication in for smoother operation
- Accurate hole spacing for straightforward alignment and fitting
- Suitable as a direct replacement for damaged or worn valve chest covers
- Resists heat, vibration, and routine handling during maintenance
- Older stock may show light storage marks; function and fit remain unaffected
Typical Applications:
Used during engine servicing and rebuilds to restore a proper seal on BSA 320CC and 420CC industrial engines. Common on site and agricultural machinery powered by these engines, including generators, pumps, mixers, compressors, and light plant. Ideal for curing minor oil weeps when paired with a sound gasket and for protecting the tappet/valve gear from workplace contaminants.
Also known as:
Tappet chest cover, tappet cover, side‐valve chest cover, pushrod cover, inspection cover, engine side cover plate, valve mechanism cover, side plate cover.
Fits Models:
BSA 320CC
BSA 420CC
Product Specifications
| L&S Part No. | 86 1990 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| Unit of Sale | 1 |
| Machine Type | Engines |
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