Monday, July 11, 2011
2004 Nissan Frontier Clanging Noise
Today’s post will be another chapter in automotive inside baseball. A customer brought in a 2004 Nissan Frontier with 3.3L V6 engine. He thought the Nissan’s belts were bad because he got a clanking noise from the drive belt area. I had him demonstrate the noise. The clanking originated at the crankshaft main pulley assembly. The rear most pulley that drives the alternator had broken free of the pulley assembly which drives three different belts, causing a clanking sound when the loose pulley wobbled and touched against the pulley in front of it. A thin neoprene type insulator ring binds the pulley to the crankshaft pulley assembly. When it breaks free it can damage the engine’s front case if the noise is ignored. I doubt this is a pattern failure because I had to special order the pulley assembly. I thought it best to illustrate this particular problem in case there are more of these out there.