Author Topic: 2 3/4hp valve cap sealing washers, which way round, or doesn't it matter?  (Read 1597 times)

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Offline spency777

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Hopefully this will be an easy one for all you experts.
I've just bought a set of four new valve cap sealing washers from the spares scheme for my 1924 2 3/4hp TS. I've noticed they have a flat side and a half domed side, anyone know if the flat goes against the cap or the cylinder head or doesn't it make any difference?
Also does anyone know what kind of PSI I should be getting with a compression tester? The bike runs OK but (to quote the reproduction owners manual) seems to have lost some of its "vim and vigour"!

Many thanks to you all,
Richard

Offline cardan

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I haven't seen the club rings, but I doubt it matters too much which way they go on. People may have their own preferences to aid sealing, but I just use oil on the threads and gasket. Smokes and bubbles a little at first, but usually seals itself after the first run. Make sure you have a close-fitting spanner, and retighten once the engine is warm. Just pull the bungs up "tight" - no need for anything drastic (like a hammer).

Leon