HOSE VENT OIL FILLER TUBE TO AIR TUBE
Breather hose oil filler tube to air cleaner
For closed crankcase ventilation
Rubber breather hose connecting the oil filler tube to the air cleaner housing. Part of the closed crankcase ventilation system that directs filtered air to the crankcase and prevents overpressure.
|
Material Oil-resistant rubber |
Function Crankcase ventilation |
|
System PCV / closed breather |
Connection Oil filler tube to air cleaner |
Features
- Oil-resistant rubber compound
- Connects oil filler tube to air cleaner
- Part of closed PCV system
- Prevents dust and dirt entering crankcase
- Essential for proper engine ventilation
★ This breather hose is an essential component of the closed crankcase ventilation system. Without correct connection, the crankcase may build up overpressure or draw in unfiltered air.
Application
Late production vehicles with closed crankcase ventilation system. Early vehicles had an open system with road draft tube without this hose connection. Check whether your oil filler tube has a breather nipple.
Installation notes
Connect to the breather nipple on the side of the oil filler tube and the connection on the air cleaner housing. Ensure tight hose clips — leaks in this system disrupt crankcase ventilation. On F-head engines, a T-piece may be used to also connect the rocker cover.
Compatibility
Only for vehicles with later oil filler tube having a breather nipple. Early MB/GPW until approximately early 1943 (engine number <204040) had no vent on the oil filler tube and used only a road draft tube. CJ-3B with F-head engine often used a T-piece to connect multiple breather points.
Historical context
The closed crankcase ventilation system was introduced from early 1943 on the Willys L-134 engine to reduce engine contamination and ensure filtered air supply to the crankcase — an improvement over the earlier open road draft tube system.
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 : AIR FILTER CJ3A, AIR FILTER CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB | 1942, 1943, 1944, 1945 |
| 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 |
| 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 |
📐 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)
