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Thread: How do you borescope cylinders? What will it show?

  1. #1

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    Default How do you borescope cylinders? What will it show?

    The borescope tool info here is very helpful, but truth be known I'm not sure how to borescope and what I'm looking at! Want to see if valves are good -- still chasing down the popping (backfire) noise under the cowl of my Clipper. Changing the intake gaskets which hopefully will help ... they look pretty cracked with parts missing on them. Would I borescope where the stack inserts the cylinder? I do have a good borescope I think ... borrowing from a friend. It has the curved end. Thanks.

  2. #2
    akflyer's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    Some things are better left up to those who know what they are doing. What is your life worth? A few hours for a mechanic who knows what he is doing to look into your engine issues?? If you don't know what you are looking at, why take the time to do it?

  3. #3

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    Default Re: How do you borescope cylinders? What will it show?

    Good advice. Thanks. Planning on doing that ... just wanted to be better informed about the process and what exactly is inside a cylinder.

  4. #4
    Harold Kroeker's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    I found this article very informative when I first started using my borescope:
    "ANATOMY OF A VALVE FAILURE THE VIEW THROUGH THE BORESCOPE: DIAGNOSING VALVE PROBLEMS" https://www.aopa.org/training-and-sa...e/valve-safety

    Burnt pizza is good! Valve Safety Poster_Final.pdf
    Harold Kroeker
    PA-16 Clipper CF-PJB

  5. #5
    Administrator Steve Pierce's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    What Harold posted. Exhaust valves are what I look at first, verify the intake valve ;looks uniform and look at cylinder walls for abnormalities.

  6. #6
    Gilbert Pierce's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    Borescope view of a good valve.
    Attached Images Attached Images

  7. #7

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    Default Re: How do you borescope cylinders? What will it show?

    Thanks guys. Wouldn't have pictured a valve to look like that!

  8. #8
    Stephen's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    What borescope are you using?
    "You can only tie the record for flying low."

  9. #9
    Gilbert Pierce's Avatar
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    Default Re: How do you borescope cylinders? What will it show?

    Oasis Scientific VA400 with WiFi adapter to my Mini 5 iPad. Takes a little experience and practice to get a picture like that but easily doable once you figure it out.
    Steves optical borescope is better but harder to use and about 25 times more expensive.
    It doesn’t take pictures.

    https://www.oasisscientific.com/store/p374/VA-400-WiFi_Bundle%3A_Vividia_Ablescope_VA-400_USB_Rigid_Articulating_Borescope_plus_VA-B2_WiFi_AirBox_for_iPad_iPhone_and_Android_Phone_a nd_Tablet.html
    Last edited by Gilbert Pierce; 09-12-2021 at 01:22 PM.

  10. #10

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    Default Re: How do you borescope cylinders? What will it show?

    Quote Originally Posted by akflyer View Post
    Some things are better left up to those who know what they are doing. What is your life worth? A few hours for a mechanic who knows what he is doing to look into your engine issues?? If you don't know what you are looking at, why take the time to do it?
    NO..........

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