Lycoming Intake tubes.

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bentonquick
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Lycoming Intake tubes.

Post by bentonquick » Fri Nov 30, 2018 1:16 pm

I am in the process of removing my intake tubes and rocker covers to refinish them. When prepping my tubes I noticed a small puncture hole in two tubes, (intentional ,like with an icepick) just two. Just wondering if any of you Lycoming mechanics know why someone would do this. By the way it is a Don Kirk build. Lycoming 0 - 540 , 260 H.P. One of the best running engines I have ever owned. Ran great with the holes in the tubes ????? Should I patch the holes?????

ffjpowell
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Re: Lycoming Intake tubes.

Post by ffjpowell » Fri Nov 30, 2018 3:22 pm

Sounds like possibly they were there to measure exhaust temp. When we r disassembling air plane motors at the shop there is sometimes a clamp with a ice pick end that fits in the hole with wire on them(EGT thermocoupler probe). But I am no mechanic. Google and see if this fits the description you are talking about.
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Gary S
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Re: Lycoming Intake tubes.

Post by Gary S » Sat Dec 01, 2018 7:02 am

No intake should ever have a hole in it. It is probably a rust hole. Jurigan has stainless steel replacements. You may have to cut it to fit but you never have to worry about it rusting again.

Lwells
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Re: Lycoming Intake tubes.

Post by Lwells » Sat Dec 01, 2018 5:28 pm

why not call Don Kirk and ask him"

bentonquick
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Re: Lycoming Intake tubes.

Post by bentonquick » Mon Dec 03, 2018 12:46 pm

Hey guys thanks for the info. I appreciate the comments. But still not sure. I know it is not a rust hole. But thanks. And I wish very much that I could call Don Kirk, but he passed away a few years back. Good man, Good Aircraft engine mechanic, Good welder and a Good Friend. I welded up the holes. Thanks

SuprchgedPalmBeach
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Re: Lycoming Intake tubes.

Post by SuprchgedPalmBeach » Mon Dec 03, 2018 12:49 pm

No intake tube under any circumstances should have any holes in it. When i have intake gasket leaks the engine backfires and runs like crap.
15' 6" Palm Beach Hull, GSO-480, 82" 3-Blade JX Series

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