Mechanics

WHAT IS CAUSING A BAD VIBRATION RATTLING LIKE SOUND UNDER THE HOOD

2008 Nissan Altima • 80,000 miles

I've changed the tensioner pulley assembly an it's still making the sound. Haven't changed the belt but I've been told even if I do change them the sound will be there still.


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Howell31
June 16, 2012.



Best check the timing chain/chain tensioner and guides if its coming from behind the front engine cover

Rasmataz
Jun 16, 2012.
You should have replaced the belts first instead of the tensioner. Did you check the marker of the belt tensioner to see if it is within limits?

KHLow2008
Jun 16, 2012.