| Also known as | E1574 |
| Diagram | Fig. 5 — CYLINDER BLOCK AND HEAD TR7RV · ref 52 |
| Subsystem | engine top |
| Listed in parts books | 1960–1962, 1964–1965, 1967–1974, 1976–1980, 1985 |
Spring washer
A spring washer fitted in the cylinder head/rocker box area across a wide span of Triumph twin engines, also known as E1574.
70-1574 is a spring washer used at the cylinder head and rocker box area of the engine. It shows up across a long run of cylinder block and head figures, from the 6T and pre-unit TR6 through the T120, T140V, T140E, and TR7RV listings, so this is a part that stayed in the parts book for decades with the same number.
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The legacy alias E1574 is the same physical washer under the earlier letter-prefix numbering, so if your parts book or an old parts bag shows E1574, you're looking at this same item.
It's a small hardware piece, cheap to keep a few spares of on hand since it's the kind of thing that tends to walk off or get buried in a parts drawer during a head or rocker box job. Given how many cylinder head figures it turns up in, double check which position it's called for before you order if you're working from an exploded diagram.
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