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re: Paging F150 Mechanics - Update in Original post.

Posted on 1/23/17 at 10:14 pm to
Posted by Clames
Member since Oct 2010
16635 posts
Posted on 1/23/17 at 10:14 pm to
Timing chains have never been a problem on the 5.4's. The plastic tensioner guides wear due to poor OCI's and maintenance practices. 400k out of a 5.4L is easy. A known fix to the tensioner guides is to polish the outside edge of the chain but it is a tedious process. Ford did this to the chains used on the SVT program vehicles.
Posted by Contender54
the Enn Oh
Member since Jan 2009
999 posts
Posted on 1/23/17 at 11:10 pm to
My first guess is hub/bearings.
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