| Also known as | E5316 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 36 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1969 |
ROTARY BREATHER VALVE TRIUMPH 1963-70 (For early use 70-2254)
A rotary breather valve for the Triumph crankcase, part 70-5316, controlling crankcase venting and internal pressure.
This is the rotary breather valve, part number 70-5316, sometimes listed under its earlier alias E5316. It shows up in the crankshaft and crankcase sections of the parts books, and it's the piece that manages internal engine pressure by timing how the crankcase vents as the engine turns over. Keeping this working right matters for keeping oil where it belongs and not pushing it out past seals and gaskets.
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The catalog notes that for earlier applications you'd want 70-2254 instead, so if you're working on something ahead of the range this valve covers, check that number first. Beyond that, our record doesn't spell out exact model-year fitment beyond the catalog span, so confirm against your engine before ordering.
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