PISTONS SIZE 030 (SET OF 4)
0.030“ (0,761mm) → 80,136mm (3.154“)
Set of 4 engine pistons dimension 0.030" (Ø=80.13mm), delivered with their pins.
Suitable for Jeep Willys MB, M38, M38A1, CJ2A, CJ3A, CJ3B, CJ5, CJ6, Hotchkiss M201 and Ford GPW
Pistons.030 oversize — Set of 4
For L-134 and F-134 engines
Complete piston set in.030 inch (.76 mm oversize) for engine rebuild after cylinder reboring. Suitable for both the L-134 'Go Devil' flathead engine and the F-134 'Hurricane' engine. Pistons are supplied with piston pins and circlips, ready for installation.
|
Cylinder bore size 125" +.030" (79.4 mm + 0.76 mm) |
Compression height 875" (55.6 mm) |
|
Type Flat top (flat piston crown) |
Set contents 4 pistons with pins and circlips |
Features
- 030" oversize for rebored cylinders
- Flat piston crown for standard 6.5:1 compression ratio
- Complete with piston pins and circlips
- Suitable for L-134 and F-134 four-cylinder engines
- Manufactured to original specifications
★ These oversize pistons are essential for an engine rebuild where cylinders are rebored and refinished. 030" size is the first standard oversize and most commonly used in regular engine restorations.
Application
Suitable for L-134 Go Devil engine (Willys MB, Ford GPW, M201, CJ-2A, CJ-3A, M38) and F-134 Hurricane engine (CJ-3B, CJ-5, CJ-6, M38A1). Application: 1941-1971. The L-134 was the original WWII engine, the F-134 is the post-war F-head version with higher compression.
Installation notes
Installation only by qualified engine machinist. Cylinders must first be measured for wear, after which boring and honing are carried out with the actual pistons to hand to achieve the correct piston-to-cylinder wall clearance. Always measure piston resistance according to specification. Oversize.040" and.060" are also available for heavily worn cylinders.
Compatibility
NOTE: oversize pistons fit ONLY in cylinders that have been professionally rebored to the correct oversize dimension. Standard size (.000") pistons do NOT fit in oversize cylinders. In cases of severe wear, boring to.040" or.060" may be required — check cylinder condition first. Both L-134 (flathead) and F-134 (F-head) engines use identical pistons with the same 3.125" bore size.
Historical context
The L-134 'Go Devil' engine was the most powerful engine during the evaluation of WWII jeep prototypes in 1940 and was used in nearly all Allied jeeps during WWII. This robust engine remained in production until 1971, first as the flathead L-134 and later as the F-head F-134.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
⚠ Spotted an error in this description? Report it to info@willys.be
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 : Piston,Rings & Bearings CJ2A, Pistons And Sleeve CJ3A, Piston,Rings & Bearings M38, Pistons And Sleeve - M38, Pistons And Sleeve 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 | 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-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)
