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Thread: how to breakin channel chrome cylinders?

  1. #1

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    how to breakin channel chrome cylinders?

    anybody have any expertise?

  2. #2

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    channel chrome

    Full throttle, good cooling and lots of time. Don't apply high loads until oil temp has come up, or glazing could occur.
    Ron

  3. #3

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    Run'em hard and don't super cool em!


    But then again whada I know.....


    Sam

    Steve, ciò in incognito è molto buona!

    Nessun non ho spedito il vostro vino....Ma mantenga la fede!





  4. #4
    nanook's Avatar
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    Break-in

    Run your engine at 75% power or more. The higher the manifold pressure the better= a cruise prop at low altitude(for normally aspirated)

    You are breaking in iron rings(soft) against a gawdawful- hard chrome surface. The amount of channeling in the chrome(egg shell pattern) really determines how well they work, too much channelling and they use oil, not enough and they don't hold the proper amount of oil for lubricating/cooling...

  5. #5

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    Chrome cylinders...

    Years ago, I put a set of chrome cylinders on a C-90 powered Clipped wing cub. The first flight scared the dickens out of me as I almost ran out of oil in a one hour flight. Oil consumption was on a steep downward curve, however. At 100 hours, it didn't use any oil at all, and I never had to add any oil between changes after that. Amazing what a little time/use will do.

    Mike

  6. #6
    SJ's Avatar
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    Quote Originally Posted by Sam Beckett
    Steve, ciò in incognito è molto buona!

    Nessun non ho spedito il vostro vino....Ma mantenga la fede![/b][/color]
    HA! Thanks Sam.

    sj

    (P.S. I don't read every post, but I did read this one...)
    "Often Mistaken, but Never in Doubt"
    ------------------------------------------

  7. #7
    Mikey's Avatar
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    My O-320 w/ channel chrome took about 10hrs cruising at 2700. Then ran the next 15hrs at normal high cruise settings. Oil consumption got down to about 8hrs/ qt after 50+ hrs. You will think you have a fuel leak when you start out, mine burned about 10gph at the readline setting.
    Chris

  8. #8
    cubunltd's Avatar
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    Make sure you use mineral oil for the break in period.


    John

  9. #9

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    take multigrade mineral oil that helps a little bit against glazing. Start the engine make a short precheck, firewall it, climb to 5500´level off and fly with full throttle or about 75% for the next 3-4 hours. That´s what Webber (Old time enginerebuilder) in Wassilla AK told me years ago. I am using now around 1 quart every 6-7 hours but I have not to worry about cylinderrust when my bomber sits on the ramp for month

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