VALVE HEAT CONTROL
Heat riser butterfly valves exhaust manifold
For L-134 engine
The heat riser butterfly valves are located in the exhaust manifold and regulate the exhaust gas flow to warm up the engine more quickly in cold conditions. This automatic system, driven by a bimetallic spring, directed exhaust gases to the intake manifold when the engine was cold to improve fuel vaporisation. Crucial component for correct operation of the heat riser mechanism.
|
Part Heat riser valve assembly |
Function Exhaust gas flow regulation |
|
Engine L-134 four-cylinder |
Mounting In exhaust manifold |
Features
- Butterfly valves for heat riser mechanism
- Mounted on shaft in exhaust manifold
- Works together with bimetallic spring and counterweight
- Regulates exhaust gas flow when engine cold
- Originally secured by welding or flat head screws
★ Essential component of the heat riser system that brings the engine to operating temperature more quickly in cold conditions.
Installation notes
The butterfly valves are mounted on the heat riser shaft inside the exhaust manifold. Originally these were secured by spot welding or with two small flat head screws. During installation, first turn the shaft fully clockwise before installing the bimetallic spring. The butterfly valves must be able to move freely without binding.
Compatibility
Fits all vehicles with L-134 engine equipped with the heat riser system. This component is part of a complete repair kit and must be installed together with the shaft, bearings, spring and counterweight for correct operation.
Historical context
The heat riser mechanism was an ingenious system on WWII Jeeps and post-war models to get the engine operational more quickly in cold conditions — important for military deployment in all climates.
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 : EXHAUST COLLECTOR - CJ2A, EXHAUST COLLECTOR - CJ3A, EXHAUST COLLECTOR - M38
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Alle Willys / Ford / Hotchkiss jeeps | 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952, 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
