Seriously.....what is this squeak 72 CB350
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Thread: Seriously.....what is this squeak 72 CB350

  1. #1
    Member Alewiska's Avatar
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    Seriously.....what is this squeak 72 CB350

    Compression test fine. Leak down test negligible. No compression = no squeak noise. What is this squeak noise and why can't I find it? I hooked up a leak down test and went through both compression and exhaust strokes and can't recreate the noise.


    The last time this happened I was under the impression that the cam wasn't getting oil, I just don't see how that could be the case.





  2. #2
    Senior Member 540nova's Avatar
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    Air leaking past plugs? Ensure they're tight.

    Sent from my Pixel 3 XL using Tapatalk

  3. #3
    Senior Member mike in idaho's Avatar
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    Compression leak, either a spark plug or a head gasket.
    '65 YG1
    '65 CB160
    '66 CL160
    '67 CL77
    '68 TR6
    '69 T100R
    '69 T120R
    '72 Commando 750
    '78 XS650E
    '79 Gl1000
    '81 440 LTD
    My company car is a Kenworth

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  5. #4
    Member Alewiska's Avatar
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    Here’s hoping for the spark plug. I really don’t want to tear it down again.


    Quote Originally Posted by mike in idaho View Post
    Compression leak, either a spark plug or a head gasket.

  6. #5
    Senior Member doode's Avatar
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    One member had something similar. Was the carb boots.
    ancientdad likes this.

  7. #6
    Member Alewiska's Avatar
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    Nail on the head doode! Just found it. Was about to start doing higher pressure leak down tests when I found that thread. Intake boot at the top has a small leak and it’s squeaking. Thanks for the help everyone!


    Quote Originally Posted by doode View Post
    One member had something similar. Was the carb boots.
    ancientdad likes this.

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