WOODRUFF CELORON CAMSHAFT
Woodruff key camshaft timing gear
3/16" × 3/4" — for celoron/fibre gear
Half-moon shaped Woodruff key for securing the camshaft timing gear to the camshaft. This key fits into the camshaft groove and prevents the gear from rotating, maintaining correct valve timing.
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Size 3/16" × 3/4" (4.76 × 19 mm) |
Material Hardened steel |
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Application Camshaft — gear drive |
Shape Half-moon (Woodruff) |
Features
- Half-moon design for optimal fit
- Hardened steel for durability
- Prevents camshaft timing gear slippage
- Essential for correct valve timing
- Size 3/16" × 3/4"
★ A small but essential component during any engine maintenance involving removal of the camshaft timing gear. The half-moon Woodruff key ensures reliable positioning of the gear on the camshaft.
Application
For engines with gear-driven camshaft (late CJ-2A from approx. 1947, CJ-3A, CJ-3B, M38). Fits both original celoron/fibre gears and metal replacement gears. Not for chain-driven engines (early MB/GPW/M201/early CJ-2A).
Installation notes
The Woodruff key is pressed into the camshaft groove — flat side outward. The camshaft timing gear is then tapped over it (do not force by sliding). Always check the timing marks on crankshaft and camshaft before finally bolting the gear in place.
Compatibility
ONLY for gear-driven engines (late CJ-2A, CJ-3A, CJ-3B, M38, M38A1). NOT compatible with chain-driven engines (MB, GPW, M201, early CJ-2A until approx. 1947) — these use sprockets, not gears, and have different mounting methods.
Historical context
The transition from chain to gear drive occurred midway through CJ-2A production (approx. 1947). The original camshaft timing gears were made of celoron (phenolic resin, also called fibre or bakelite) to run quietly, but these were often replaced with more durable metal gears during restorations.
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 : LOWER ENGINE CJ2A, Camshaft pinion CJ3A, LOWER ENGINE M38, Camshaft pinion CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW (early) | 1942 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 (early) | 1956, 1957, 1958, 1959 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |
| Willys M38 | 1950, 1951, 1952 |
| Willys M38A1 | 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
| Jeep CJ-3A | 1949, 1950, 1951, 1952, 1953 |
| Jeep CJ-3B | 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 |
| Jeep CJ-5 | 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
