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Discussion Starter · #1 ·
2006 Explorer 4.0 L top end rebuild?!?My truck makes a terrible noise. I was told it could be a broken rocker arm but it drives great. The check engine light is on and the diagnostic told me it鈥檚 running a bit rich. Should I rebuild the top end and howwould it run fine!?馃檧

Super Moderator
169 Posts
"Noisy" would seem an understatement. All that banging and racket is causing pieces to come off the rocker arm into the oil. Can't be a good thing.
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