Car Problem Reports

Nissan Altima Loose Screws Inside Intake Manifold Can Cause Internal Damage if They Fall Out

Nissan Altima Problem
12 Reports
Me Too

Model Years Affected: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010

Engine Affected: 2.5L 4 Cylinder

Average Mileage: 85,333 mi (79,000 mi - 96,000 mi)


Screws inside the intake manifold can become loose causing internal engine damage if they fall out completely. Our technicians report that using a strong thread locker on the power valve butterfly screws can help prevent them from becoming loose.

  • Visitor, , 2.5L 4 Cylinder, 81,000 mi

    Lost power 600 mi. from home,we drove it like that and took it to the dealer next day. Power valve butterfly screws backed off,2 on one valve 1 on another they passed through with no damage to the engine
    (very Lucky)cost us $1200 to fix 'cause we were out of warranty. 3 years later I suspect is what has caused our catalytic converter to fail.

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  • Visitor, , 2.5L 4 Cylinder, 96,000 mi

    Good thing we bought the extended warranty, engine blew due to this problem. They replaced the engine, only because we bought the extended warranty. yikes

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