I’m wondering if anyone knows of a source for the rubber ‘top hat’ shaped sealing sleeves that seem to be the original type fitted at the top and bottom of the vertical bevel tube on a SOHC Carrol engine? The practice of fitting O rings (with special nuts?) appears to be the common approach these days but I was hoping to keep my first Inter top end rebuild as simple as possible.
Any suggestions as to source or even a simple alternative without buying new nuts would be very welcome.
Cheers, Bruce
I thought that I had come up with a good solution.....
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Like Michael...I thought the…
Like Michael...I thought the same. I think that if you fit o rings in the original bottom nut, there is a theoretical possibility of them working their way down into the lower bevel...I reused the rubber collar as I wasn't prepared to take that risk. For some reason I cannot remember, I'm sure O rings are safe inside the original pattern upper nuts. But beware of making design changes (obviously...). And check if I've described it the right way up...
Paul's stuff is very beautiful but in my case I bought his nuts and ender up reusing my old ones. His stainless steel machined all over looks a bit out of place compared with the originals which appear to be forged, and threads were too tight. My motor is very much not dry anyway...
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Thanks folks…
… for the opinions and advice. I’ve managed to speak to Stu Rogers, very helpful, and the seals and more are on order. He explained that he doesn’t do the bevel tube sleeve seals any more but has engineered an o-ring/spacer/o-ring combo that works with the std nuts and does a better job so that’s the direction I’m headed. Can post a pic or two when the time comes. Cheers again.
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I sometimes wonder if a…
I sometimes wonder if a reason why they often leak is because of oil backing up onside the cambox because of too slow an oil return down the tube? Some bevel drive OHC Ducattis have acrylic clear plastic covers over the top bevel. I wonder what the oil level is and should be inside the cambox? It would be a challenge to fit a clear cover if you have a central oil feed. Various authors suggest checking the oil pressure in the OHC feed line but that's not the same as checking the flow rate (which depends on the resistance).
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......with various o-rings and spacers that I made up. Nope. Gave in, spent the $ and bought Paul Norman's special nuts. They work like a charm.