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  1. J

    5.4 roller follower failure

    I can tell you exactly when the roller seized. I was backing into my campsite and at an idle there was a distinct “chirp” coming from the engine. Also at that time it would intermittently squeal when accelerating.
  2. J

    5.4 roller follower failure

    It wasn’t meant to be. I discovered cam bearing when I removed the cam (should have noticed them sooner). The bearing by the phaser was wiped out and there was a ball of wire brush bristles in the oil port on the cam. I couldn’t identify the bearings by their markings so I ordered a standard...
  3. J

    5.4 roller follower failure

    Just the tapping noise. I am running Mobil 1 5w-20 and it was pretty hot last week when this all started.
  4. J

    5.4 roller follower failure

    Hello everyone. This is a first time post but I wanted to share my current 5.4 experience. I bought a 2014 Expedition EL this spring that, despite having 160k miles, was remarkably quiet in the top end. Last week, 2000 miles from home and across the Rocky Mountains, it developed a loud valve...

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