Description
Overview:
This Cylinder Head Bolt (Long) is a genuine Villiers component for the MK40 engine, supplied under Manufacturer Part Number EM757. It is a steel fastener designed to clamp the cylinder head securely to the barrel, maintaining stable compression and a reliable head gasket seal. As unused old stock, it is original equipment and may show light tarnishing from storage, which does not affect performance. The long format provides the correct reach and engagement for the MK40 top end, giving consistent clamping across the head. Made for routine maintenance and full rebuilds, it supports dependable engine assembly using standard hand tools. Genuine fitment helps avoid thread mismatch and alignment issues often found with generic replacements, keeping your Villiers MK40 running as intended.
Key Features:
- Genuine Villiers part (EM757) for assured compatibility and fit on MK40 engines
- Steel construction for dependable strength and long service life
- Correct "long" length to suit MK40 cylinder head assembly and clamping needs
- Rolled thread profile for smooth installation and reliable torque retention
- Helps maintain head gasket integrity and even sealing pressure
- Unused old stock; may show minor storage tarnish without affecting function
- Direct replacement for worn, stretched or corroded original bolts
- Easy to fit with standard spanners; torque to the engine manufacturer's specification
- Suitable for routine head gasket changes, top-end overhauls and restorations
- OEM geometry reduces risk of thread damage to the head or crankcase
Typical Applications:
Used to secure the cylinder head during head gasket replacement, decoke and top-end service, full engine rebuilds, and period-correct restorations of Villiers MK40 engines. Ideal when original fasteners are missing, damaged, or have lost clamping force.
Also known as:
Cylinder head fixing bolt, long head bolt, engine head fastener, cylinder head screw, MK40 head fixing, engine clamping bolt.
Fits Models:
MK40
Alternate Part Numbers:
EM757
Product Specifications
| L&S Part No. | EM757 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| OEM No. | EM757 |
| Unit of Sale | 1 |
| Applications | MK40 |
| Machine Type | Engines |
| Fits Brands | Villiers |
| Fits Models | MK40 |
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