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Crank case venting

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Old 07-13-2014, 07:26 AM
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maxwell 1
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Default Crank case venting

Hi all I've got a Saito150 and I'am contemplating plumbing the crank case vent line into the lower end of the exhaust, that way the exhaust would carry any blow by away. My concern is would I be creating pressure on the vent thus not allowing the motor to vent..... thanx Max
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Old 07-13-2014, 07:44 AM
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Rodney
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While I have no valid data to substantiate this, I'd recommend that you do not do this. Now, some of the engines do route this vent back to the intake venture but I've never been a fan of that either as any combustion particles that get into the crankcase due to blow-by or down the push rod tubes could cause excess wear on the piston/sleeve area. Note; this is only my thoughts with not a lot of data to substantiate it.
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Old 07-13-2014, 06:41 PM
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If none of the manufacturers have done it before it's probably been tried and rejected as an idea that didn't work.
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Old 07-16-2014, 04:41 PM
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When it's convenient you can sometimes run the crankcase vent tube into a slightly larger short length of aluminium tubing and use that to support the line and run it clear of the airframe.
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Old 07-18-2014, 01:41 PM
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I have had a couple of Saito engines that do NOT like a long vent line....but are O.K. with one just long enough to clear the fuse.
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Old 07-18-2014, 02:32 PM
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I just mount a piece of hard line to the end of the muffler and put the vent onto it. This way the hard line is in the exhaust stream and blows it away.

David
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Old 07-18-2014, 03:48 PM
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David, can you take a picture of your set up? I'd really like to see how you did that.
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Old 07-18-2014, 04:24 PM
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You can cut the line shorter if you want.
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