| Also known as | E5315 |
| Diagram | Fig. 2 — CRANKCASE · ref 32 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1965, 1967, 1970–1971 |
COPPER SEALING WASHER 1IN SUMP DRAIN - 042065
Copper sealing washer for the crankcase sump drain plug on Triumph unit twins.
This is the copper sealing washer that sits under the sump/crankcase drain plug, sized for the 1 inch drain plug used on Triumph unit twins. It shows up in the crankcase figure of the parts books and carries the old E5315 number as well as the current 70-5315.
Read more
Copper washers like this one are meant to be crushed once to seal properly, so it's a good idea to fit a new one any time you pull the drain plug for an oil change rather than reusing the old one. Keeping a few on hand saves a trip back to the shop mid-service.
Our catalog data has this washer appearing across a run of years on the unit-construction twins, so if you're doing routine crankcase drain plug work on one of these engines this is the washer to grab.
Sorry if we got something wrong here. If you think this information isn't correct, .