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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
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<blockquote data-quote="Simon Dinsdale" data-source="post: 13179" data-attributes="member: 58"><p>One thing that has always worried me about Earnesto's breather solution of connecting it to the oil tank is it's not just air and oil breathing into the tank, but also water. Look at what comes out of your breather. I put a bottle on the end of my Vincents breather pipe, and over a dry 200 miles it collected a teaspoon of emulisified oil which was floating on top of 50cc of water. </p><p>In Earnesto's breather, that water would also have been returned to the oil tank as water vapour. Modern engines run the oil hot enough so the water is evaporated off, but the oil temperature in a Vincent's oil tank is a lot lower.</p><p></p><p>You could blame it on the damp weather in the UK but the above test was on a dry run to the Severn rally. Maybe where Earnesto lives is it very dry, but you will still get a very small amount of water vapour passing the pistons to the oil below as it is one of the byproducts of the combustion process.</p></blockquote><p></p>
[QUOTE="Simon Dinsdale, post: 13179, member: 58"] One thing that has always worried me about Earnesto's breather solution of connecting it to the oil tank is it's not just air and oil breathing into the tank, but also water. Look at what comes out of your breather. I put a bottle on the end of my Vincents breather pipe, and over a dry 200 miles it collected a teaspoon of emulisified oil which was floating on top of 50cc of water. In Earnesto's breather, that water would also have been returned to the oil tank as water vapour. Modern engines run the oil hot enough so the water is evaporated off, but the oil temperature in a Vincent's oil tank is a lot lower. You could blame it on the damp weather in the UK but the above test was on a dry run to the Severn rally. Maybe where Earnesto lives is it very dry, but you will still get a very small amount of water vapour passing the pistons to the oil below as it is one of the byproducts of the combustion process. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Additional or alternative engine breather
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