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2001 Subaru Impreza WRX Engine Knocking or Piston Slap??

871 Views 2 Replies 3 Participants Last post by  headgasketenthusiast
Hey there,

I have a video of my 2001 WRX with what sounds to be piston slap or rod knock? I can't differentiate, if anyone would be able to advise that would be amazing.

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Does it go away when the engine is warmed up to operating temperature? Because that doesn't sound like slap.
All the cars ive heard that have piston slap don't sound nearly that scary. That does sound like a bottom-end problem to me. You can hear the speed of the knock increase when you turn the throttle body in the second video a little bit which is textbook rod-knock.
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