LOCK NUT CONNECTING ROD CAP BOLT 7/16
Lock Nut Connecting Rod Cap Bolt 7/16
Self-locking PAL-nut
Self-locking nut (PAL-nut) for securing connecting rod cap bolts in the L-134 Go Devil engine. This split-lock nut ensures a reliable, vibration-resistant connection between the connecting rod and crankshaft.
|
Thread 7/16 inch |
Type PAL-nut (split lock) |
|
Application Connecting rod cap bolt |
Quantity per engine 8 pieces required |
Features
- 7/16 inch thread for early chain-drive engines
- Self-locking PAL-nut design (split lock)
- Prevents loosening from vibrations
- Critical component for reliable engine assembly
- Meets original specifications
★ Lock nuts must be replaced during every engine rebuild. Used PAL-nuts lose their self-locking properties and must never be reused.
Application
Specific to L-134 engines with 7/16 inch connecting rod bolts. These larger bolts were used in early WWII-era engines with chain-drive camshaft. Each engine requires 8 pieces (2 per connecting rod, 4 connecting rods total). Note: later engines with gear-drive use smaller 3/8 inch bolts and require different nuts.
Installation notes
Install PAL-nuts with the flat side facing forward (towards the bolt). Torque specification for 7/16 inch connecting rod bolts: 35-45 ft-lbs (approximately 47-61 Nm). Rotate crankshaft a quarter turn between tightening each bolt to detect binding. Always replace used PAL-nuts — never reuse.
Compatibility
ONLY for engines with 7/16 inch connecting rod bolts. These are typically the early chain-drive L-134 engines. Later gear-drive engines (from mid-1940s onwards) use smaller 3/8 inch bolts with different lock nuts. Not interchangeable. Verify original bolt diameter before ordering.
Historical context
The PAL-nut (Positive Locking) was developed by the American automotive industry as a self-locking element for critical engine components. The split-lock construction creates permanent spring tension that prevents vibrations and loosening — essential for the reliability of military vehicles under severe conditions.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
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This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
ALL_CATEGORIES : Connecting Rods & Hardware Willys MB Ford GPW M201
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |
📐 Diagrams & technical drawings
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
