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Just recently i have noticed a deep tapping noise from the engine, it can only be heard inside the car on the drivers side? when looking into the engine bay you cant really hear it..
any ideas what this could be?
My 172 taps. Think it's the lifters though. It does it once it's warm and idling. I can hear that in the car more than outside as well. It goes if I blip the throttle then reappears after being left to idle for a few mins!