Internal Engine Damage Caused by Screws From Intake Manifold on Nissan Altima

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 85,333 (79,000–96,000)
Engine affected: 2.5L 4 Cylinder
9 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009, 2010
14 people reported this problem
Viewing 1 - 2 of 2 comments
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.
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