SOUPAPE VENTILATION CARTER
Crankcase ventilation valve (PCV valve)
For L-134 engine with closed ventilation system
This crankcase ventilation valve (Positive Crankcase Ventilation valve) is an essential component of the closed ventilation system on the L-134 engine. The spring-loaded valve regulates vacuum in the crankcase and returns blow-by gases to the combustion chambers via the intake manifold. Regular cleaning of this component prevents engine damage from oil build-up and increased crankcase pressure.
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Function Crankcase ventilation with spring-operated valve |
Mounting Horizontal on valve cover, connection to intake manifold |
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Application L-134 engine with PCV system |
Ventilation type Closed system (Positive Crankcase Ventilation) |
Features
- Spring-operated valve for automatic pressure regulation
- Horizontal mounting on side valve cover
- Connects to intake manifold via steel pipe
- Prevents oil leakage and engine oil contamination
- Regular cleaning required — not replaced like modern PCV valves
★ This valve is designed for disassembly and cleaning. A malfunctioning PCV system causes starting problems, rough idling and increased oil consumption.
Application
Suitable for vehicles with L-134 engine fitted with the closed crankcase ventilation system (PCV). This system was introduced in January 1943 (from Willys MB chassis #208437 / engine #204040) and was used on late military jeeps and civilian jeeps. Early MB/GPW vehicles (until early 1943) had an open road draft tube system (A-1061) — this valve does NOT fit those. Please note: the categories in which this product appears list various vehicle models, but always verify that your vehicle actually has a PCV system before ordering.
Installation notes
The valve is mounted in the ventilator housing (cup A6919) which is fitted to the side valve cover. The threaded side of the valve connects to a steel pipe to the intake manifold. Ensure the air flow is correct: vacuum on threaded side. Clean regularly by removing the valve, inspecting and cleaning the internals (spring and valve body). Do not use standard hose — only oil-resistant fuel line or special PCV hose.
Compatibility
ONLY for vehicles with closed PCV system (from early 1943). NOT compatible with early jeeps that have a road draft tube (A-1061). If in doubt: check whether your valve cover has a mounted cup (A6919) with threaded connection. In the absence of a PCV system, your vehicle probably has an open draft tube protruding beneath the oil sump.
Historical context
The closed crankcase ventilation system was introduced on military jeeps in January 1943 as an emission control measure and to reduce oil contamination. The system uses manifold vacuum to return crankcase gases to the engine, rather than venting them outside via a draft tube.
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 : Exhaust & Intake Manifold Willys MB Ford GPW M201, Upper Engine CJ2A, Upper Engine Valve CJ2A, EXHAUST COLLECTOR - CJ2A, Upper Engine Valve CJ3A, EXHAUST COLLECTOR - CJ3A, Upper Engine M38, Upper Engine Valve M38, EXHAUST COLLECTOR - M38, Upper Engine Valve CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| 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 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
| Jeep CJ-3A | 1949, 1950, 1951, 1952, 1953 |
📐 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)
