| Also known as | 70-4603 |
| Diagram | Fig. 5 — CYLINDER BLOCK AND HEAD TR7RV · ref 16 |
| Listed in parts books | 1964–1965, 1967–1968, 1970–1971, 1974, 1976–1980, 1985 |
VALVE,INLET BY LF HARRIS
Inlet valve for the cylinder head, catalog number 70-4603H, made by L.F. Harris.
This is the inlet valve, part number 70-4603H, produced under license by L.F. Harris (the modern manufacturer that continued Triumph production and parts supply after the original factory closed). It's the same physical part as 70-4603, the earlier catalog number.
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An inlet valve sits in the cylinder head and opens to let the fuel/air mixture into the combustion chamber on the intake stroke, then seats closed the rest of the cycle. It's a wear item that takes direct heat and impact every time the engine runs, so it's worth checking condition and seat contact whenever a head comes apart.
Our records on this one are sparse beyond the part number and manufacturer note, so if you're matching it against a specific engine, check it against your parts book or give us a call and we'll help confirm before you order.
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