Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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If you can make a Youtube video of the sound clip then leave it open to the public and send the link to me I can then listen to this noise.
I have seen the lifter/lash adjusters fail and causes this noise as well under the intake area or valve cover area.This wont cause any running issues and generally makes this noise the loudest at low speeds and goes away the higher the speed or quiets down the higher the speed.This sounds like what you are hearing here.Generally it wont cause any engine running issues but can be an annoying noise.These should be looked into to see if this is a lifter/tappet at fault needing replaced.Usually an automotive stethescope is used to listen to the noise closely to help determine what area in the engine it is loudest then the engine is taken apart somewhat to inspect to locate the faulty lifter/tappet needing replaced.
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