GASKET WATER OUTLET ELBOW
WO639650
Water Outlet Elbow Gasket
For L-134 engine with thermostat housing
Paper gasket for sealing between thermostat housing (water outlet elbow) and cylinder head. This gasket ensures a reliable seal of the cooling system and prevents leakage at the water outlet. Essential with every thermostat replacement or cooling system service.
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Material Paper |
Engine L-134 L-Head 4-cylinder |
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Original number 639650 |
Application Thermostat housing to cylinder head |
Features
- Pressed and die-cut as original
- Replacement part for reliable sealing
- Compatible with L-134 flathead engine
- Recommended replacement at every thermostat service
- 1 gasket required per vehicle
★ Correctly manufactured gasket that properly seals the thermostat housing against the cylinder head. Always use a new gasket during installation for leak-free operation.
Application
Fits vehicles with L-134 L-Head engine: Willys MB (1941-1945), CJ-2A (1946-1949), CJ-3A (1949-1953), M38 (1950-1952), Willys Truck (1946-1949), Station Wagon (1946-1949) and Jeepster (1948-1949). NOTE: L-Head version only, not for F-Head engines (CJ-3B, M38A1).
Installation notes
Remove old gasket and clean both surfaces thoroughly. Optionally use a thin layer of heat-resistant Permatex or similar gasket sealer. Torque specification for water outlet elbow: 20-25 ft-lbs (27-34 Nm). Check for leaks after initial warm-up.
Compatibility
Exclusively for L-134 L-Head engines (1941-1953). NOT compatible with F-134 F-Head engines used in later models (CJ-3B, M38A1, later CJ-5). The F-Head engine has a different thermostat housing design and uses a different gasket (648852).
Historical context
The L-134 'Go Devil' engine was the workhorse of the Willys MB and Ford GPW during WWII. The cooling system with its characteristic water outlet elbow was designed for reliability under severe combat conditions.
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 : Thermostat Elbow Willys MB – WWII Cooling Neck, Upper Engine – Cylinder Head, Sealings&Accessoires CJ2A, Upper Engine CJ2A, UPPERENGINEHEAD CJ2A, Cooling Thermostat Elbow CJ2A, Sealings&Accessoires CJ3A, UPPERENGINEHEAD CJ3A, Cooling Thermostat Elbow CJ3A, Sealings&Accessoires M38, Upper Engine M38, UPPERENGINEHEAD M38, Seals Oil Water engine, Sealings&Accessoires CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 | 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966 |
| 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)
