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

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. The manual transmission models reportedly do not have the intake manifold power valves.

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Average mileage: 124,666 (78,000–188,000)
Engine affected: Automatic Transmission
3 model years affected: 2001, 2002, 2004
5 people reported this problem
4 people shared problem details
loud knocking in upper part of engine have not diagnosed the problem yet
replaced screws and included threadlocker on all screws. plate had fallen off and got lodged in the intake manifold. no damage to engine occured.
I heard loud engine knock that lasted a few minutes before disappearing. I removed upper intake plenum to discover 1 missing power valve and two screws. The knock I had heard was power valve screw inside cyl. before it made it's way out the exhaust. I found the loose power valve stuck in an intake runner.
hear noise in the manifold area. maybe having it check would be great!
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