SHAFT HEAT CONTROL VALVE
Heat riser control valve shaft exhaust manifold
For L-134 engine
Drive shaft for the heat riser control valve mechanism in the L-134 engine exhaust manifold. This shaft carries the butterfly valve which, when the engine is cold, directs exhaust gases along the inlet manifold for improved fuel vapourisation. Driven by a bi-metal spring which opens the valve as the engine warms up.
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Application Exhaust manifold L-134 engine |
Function Butterfly valve heat control drive |
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Material Steel |
Supply Shaft only (excl. control, valves, bearings) |
Features
- Drive shaft for heat riser control valve in exhaust manifold
- For L-134 four-cylinder engine
- Carries the butterfly valve (flapper) inside manifold
- Driven by bi-metal spring with counterweight
- Prevents exhaust leakage via bearing bushes
★ Essential component for correct operation of the heat riser mechanism that improved cold starts on military vehicles.
Installation notes
The old bearing bushes must be driven out of the manifold for replacement. Butterfly valve (flapper) may be welded to shaft or secured with two small countersunk screws — check original before dismantling. Bi-metal spring rests on adjuster bracket and works against counterweight.
Compatibility
Only for engines with heat riser version of exhaust manifold. Later exhaust manifolds without heat riser system do not use this component. Often part of a repair kit (complete with bearing bushes, spring, washers and counterweight).
Historical context
The heat riser system was a standard feature on the L-134 engine to improve carburettor vapourisation during cold starts — essential for reliable starts in cold war zones.
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 COLLECTOR - CJ2A, EXHAUST COLLECTOR - M38
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 (early) | 1956, 1957, 1958, 1959 |
| 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 |
| 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)
