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Building Integrity
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Date:  7-28-2018
Number of Hours:  3.00
Manual Reference:  Section 2
Brief Description:  The 25hr maintenance continues...

Over the last 28hrs of run time, this engine has showed its weak spots and areas of needed attention. I have one-by-one tackled each issue that has come up in order to let her "settle in" to a reliable installation. While she is getting her 25hr routine maintenance, I wanted to tackle a few more things, one of which is the thrust angle. Over time the rubber mounts settle into their final position and I've watched the prop flange drop by almost 1/8" from it's original location which was expected. Expecting the engine to drop a bit more, I added a 1/16" washer under each lower engine mount post to raise the thrust angle up 1/8" back to its original location. This should also help keep the exhuast pipes further away from the lower cowling. Next up, I cut off all of the Oetiker clamps that were installed on the intake manifold. These clamps are ok if the connection never becomes a problem. But I'm seeing evidence of a leaking intake manifold so I'm modding the setup. The change will get rid of the aluminum tubes that rely on a very thin o-ring for a seal. This Oring is leaking on 4 of the 6 tubes, and one was split in half, so instead I will be installing a longer length of silicone hose and using standard SS clamps to allow a more precisely assembled intake manifold that will NOT leak. Next up was a borescope of all cylinders. #6 is looking good, though all have some vertical scoring which isn't too concerning yet, but will be if it gets much worse. For now, I'll ride it out to 50hrs. I then re-installed all the cleaned spark plugs and mounted my plug cleaner on the hangar wall. :) Not bad for a 3 hour day.
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1 washer added under each post

1 washer added under each post

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thrust angle raised 1/8

thrust angle raised 1/8"

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cutting off the Oetiker clamps

cutting off the Oetiker clamps

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