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Old 09-03-2011, 02:48 AM
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Location: York, UNITED KINGDOM
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Default RE: 4C crank case drain

Here is my Enya .60.

I soft-soldered a steel patch to the inlet manifold, so as to provide enough material to accept a threaded nipple.

When the engine is running, you can clearly see the flow of "mostly-oil" from the crankcase to the inlet manifold. It's a surprisingly good flow rate ... and it guarantees that fresh lubricant is reaching those hard-to-lubricate timing gears.

Here is my Saito 2.20.

The manifold is an alloy casting, so I drilled a small hole into the flange and let in a piece of brass tubing. I carefully flared the end of the brass tubing such that the silicon tube is more securely retained.