| Also known as | E4549 |
| Diagram | Fig. 4 — CYLINDER BLOCK AND HEAD, 6T AND TR6 · ref 27 |
| Subsystem | engine top |
| Listed in parts books | 1964–1965, 1967–1968 |
Joint washer
A cylinder block and head joint washer for the 650 twin engine family, also listed under the older E4549 number.
70-4549 is a joint washer that shows up in the cylinder block and head figures for the 650 twins, sitting between two machined surfaces to keep things sealed where they mate up top. In the older parts books it was listed as E4549, which is the same physical piece under Triumph's earlier lettered numbering system.
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It appears across the cylinder block and head listings for the 6T, TR6, TR6R, TR6C, and T120/T120R figures, so it's a part that gets called for whenever that top-end joint is being reassembled or gone through during a rebuild. Given how many different figure titles it shows up in, this looks like a small but recurring piece worth having on hand rather than waiting to source one mid-job.
We don't have more detail on this one beyond the joint washer description and its figure placement, so if you're matching it to a specific engine, bring in your old part or check the number in your own parts book before ordering.
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