| Also known as | 19T, E4752 |
| Diagram | Fig. 5 — CYLINDER BLOCK AND HEAD TR7RV · ref 9 |
| Subsystem | engine top |
| Listed in parts books | 1964–1974, 1976–1979 |
Sealing ring, cover tubes
Rubber sealing ring for the pushrod tube where it meets the cylinder block or head on Triumph twins.
This is the sealing ring that sits at the pushrod tube where it meets the cylinder block or head on Triumph twins. It's a small rubber ring, and its job is simple: keep oil from weeping out where the tube passes through the casting. On the old letter-code parts books this one was listed as 19T, and it also shows up as E4752 - all the same physical part.
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Given how many cylinder block and head figures this ring turns up in, it's clearly a common item across a wide span of Triumph twin production, from the smaller unit twins right through to the 750cc T140/TR7-era engines. Because the exact fitment varies by which pushrod tube and casting combination you've got, check it against your parts book or bring your old one to the counter before ordering.
These tend to get hard and lose their seal over time, so if you're pulling the head or barrels for any reason it's a good idea to have fresh ones on hand rather than reuse the old ones.
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