Engine TICK
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This is a discussion on Engine TICK within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have an '07 completely stock Wrx Limited. SOME of the time while accelerating with a casual driving style there ...

  1. #1
    Registered User Leify's Avatar
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    Engine TICK

    I have an '07 completely stock Wrx Limited. SOME of the time while accelerating with a casual driving style there is an engine tick that is sooooo annoying. Much more noticable if driving next to objects or in tunnels. To narrow it down it really sounds turbo related because if I watch my boost gauge, only when there is minimal boost (throttle needed though) is there this mysterious noise. Under full throttle the noise seems to speed up enough to not sound out of the ordinary. At first I was thinking exhaust leak but I can't seem to reproduce the noise rev'ing in Neutral. (not enough boost in Neutral) Appreciate any suggestions!

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  3. #2
    He simply abides. SD_GR's Avatar
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    If it's not rhythmic, I wonder if you're describing wastegate flutter.
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  4. #3
    Registered User Black X Dahlia's Avatar
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    or your just hearing piston slap, normal in our cars.
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  5. #4
    Registered User Leify's Avatar
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    It might be the wastegate...I doubt it's piston because it would be on somewhat of a regular basis right? Some days, nothing. Other days all day during mild acceleration I hear it. Pretty annoying. (if it is the wastegate any way to silence it?)

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    Registered User p0rnstar19's Avatar
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    i had that problem with a blown exhaust gasket between the dp and mid-pipe... might be that.
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    Registered User JUSTINSNUTSWINGER's Avatar
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    Does it go away 90% when you are in boost = normal
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  8. #7
    Registered User Leify's Avatar
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    When under full boost/throttle it goes away. If I'm on a back road just cruising along in 3rd gear let's say. If I give it some throttle even more a few moments, it makes the noise. The moment I let off it stops. If i really give it to it the noise is gone as well. Only seems to be under low boost.

  9. #8
    The Default One SeattleJeremy's Avatar
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    Defiantly Waste Gate Flutter.

    To make it quieter you can add some Dynomat (or equivalent) to the passenger side foot well.

  10. #9
    Admiral Ackbar mycologist's Avatar
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    Quote Originally Posted by SD_GR View Post
    If it's not rhythmic, I wonder if you're describing wastegate flutter.
    +99%
    Fluttering at partial throttle/partial boost is normal. Your hitting a boost pressure near the wastegate spring pressure and it flaps around.
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  11. #10
    Registered User Leify's Avatar
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    Yea as long as it is normal that's fine...Just thought it was weird that it's not all the time even in duplicate driving scenarios.

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