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Thread: Spark Plug Gasket Size O-320

  1. #1

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    Spark Plug Gasket Size O-320

    I have the Lycoming part number but quick sanity check - they are all 18mm gaskets, correct?

  2. #2
    skywagon8a's Avatar
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    Yes, or if automotive 14mm.
    N1PA

  3. #3

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    Lol, well I see 14 and 18mm available so I'm still just as unsure. Looking at these.

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  4. #4
    skywagon8a's Avatar
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    Quote Originally Posted by TxAgfisher View Post
    Lol, well I see 14 and 18mm available so I'm still just as unsure. Looking at these.

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    Those are the ones.

    You won't find the 14mm automotive on a certified airplane, with a Lycoming engine.
    N1PA
    Thanks TxAgfisher thanked for this post

  5. #5
    frequent_flyer's Avatar
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    Did annealing and re-using fall out of favor?

  6. #6

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    For $0.68 I swap 'em.
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  7. #7
    Grant's Avatar
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    Quote Originally Posted by TxAgfisher View Post
    For $0.68 I swap 'em.
    yes - I dont have the time or energy to go through the effort of doing all that work just to get a bent up & used gasket....
    Likes RaisedByWolves liked this post

  8. #8
    algonquin's Avatar
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    LOL, I anneal them because it’s a project I do with my Grandson, 12, he like helping. Also I change them if I pull a plug for any reason even if it’s only a couple hours ,if the engine has been started and warmed up.
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  9. #9
    Grant's Avatar
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    Quote Originally Posted by algonquin View Post
    LOL, I anneal them because it’s a project I do with my Grandson, 12, he like helping....

    That right there is a reason to do anything ..... Cash in the MEMORY Bank is more valuable than cash in the MONEY bank......
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  10. #10

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    Annealing only works so many times and they quit fitting. I go through about 60 a week

  11. #11
    wireweinie's Avatar
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    Quote Originally Posted by Den View Post
    Annealing only works so many times and they quit fitting.
    Can you explain?

    Web
    Life's tough . . . wear a cup.

  12. #12
    Charlie Longley's Avatar
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    Both Continental and Lycoming recommended replacement during spark plug rotation.

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