dutchd1
Member
Perhaps the Ford dealership was incorrect. That's what they told me. They said the chains were stretched to the point the tensioners could no longer tension them enough to keep the timing consistent. Wouldn't be the first time a dealership made a mistake I guess.5.4 uses twin Morse heat treated timing chains, they aren't stretching much lol. The EcoBoost only uses a single chain. What happens is the chain tensioners blow out at higher mileage and can’t keep the chains tensioned. I just did all that work to my 5.4 in April. Stout design but the tensioners are the weak spot.
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