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Ford Tech Explains Why He Doesn’t Like 5.4L V8 3V Part: Video

Veteran Ford technician Brian, perhaps better known by his YouTube alias, Ford Tech Makuloco, has had plenty of Blue Oval products with the three-valve Ford 5.4L V8 Triton engine pass through his shop over the years. He’s made plenty of videos detailing the engine’s flaws, including roller follower issues, its incessant need for routine maintenance and the importance of using OEM spark plugs to avoid irreparable damage. Recently, he explained why he prefers the OE-style plastic composite tensioner instead of swapping to an upgraded cast-iron ratcheting tensioner found in older two-valve engines to solve timing set issues.

“Why do I use them? Well, it ain’t cost,” he said. In order to demonstrate why he prefers the plastic tensioner, he used a Ford 3.5L V6 EcoBoost engine experiencing issues with its timing sets as an example. This engine had a cast-iron ratcheting tensioner from the factory, similar to that of the older two-valve engines. However, Ford discovered that this design contributed to chain stretch, since it essentially keeps tension on the chain at all times. As a fix, Ford released a new tensioner that does not feature a ratcheting mechanism to prevent undue tension.

“You gotta think, there was a reason for that,” the Ford tech explains of The Blue Oval’s decision to move away from ratcheting tensioners on the 3.5L EcoBoost. It would stand to reason, then, that similar issues could arise from the same sort of tensioner being used on the 5.4L V8 Triton. This is why Brian shies away from using them when making repairs to a Triton. He does acknowledge that removing the ratcheting mechanism from a tensioner is possible, but he prefers not to do so, as modifications increase the likelihood of critical engine failure.

“Food for thought,” he says. “If they’re getting away from it [on the 3.5L EcoBoost] to fix an issue, you may just want to stick with the plastic housing tensioners that are non-ratcheting on your 5.4L three-valve.”

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Alexandra is a Colorado-based journalist with a passion for all things involving horsepower, be it automotive or equestrian.

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Comments

  1. Bob B.

    I wish the aftermarket would make an iron non-ratcheting tensioner. I agree that the ratcheting style tensioner can cause chain stretch (and guide wear) but one problem with the plastic tensioner is that they can distort and leak oil, which may contribute to low oil pressure in the heads and subsequent valve train wear.

    Reply
  2. MODULARMONSTER

    Ummm, MMR has MMR Billet Primary Tensioners with or without ratchet now for years and you dont need the plastic to get away from ratchet

    FORDTECHMAKULOCO has always been a great source of info but this time he’s a little behind the ball

    Reply
  3. Tamahiki Hohepa

    New Zealand.
    Countries.
    Learning to care about makes good sense of value.

    Reply
    1. Izeah quales

      Ford has just gone to sleep the Doge chargers and hell cats are taking over on television what’s going all Ford talks about is its trucks you don’t hear anything about ford GT 500 or 5.0 what’s going on this why sales are down come on guys wake the hell up and stop playing general Electric let’s have some fun before it ends get back in game

      Reply
      1. JDE

        GT500 was removed from the line up, Dodge is giving one last year to get a real V8 then they are supposedly calling it quits. I think the 3.0 turbo will be all you can find, but they are not saying much. I think the Electric charger is interesting, but not likely to be priced for most. most likely they will offer a couple different tunes of the 3.0 like the 2.7 GM in the colorado and hopefully a Jeep plug in hybrid with the 2.0 turbo for those wanting to wade into the EV side of thing versus take a complete plunge. seems all a birt odd to me, but I guess we will see who sinks and swims in this new paradigm.

        Reply
  4. H.T.

    All I gotta say is like my grandpa I have a wood burning stove and heaters’ Oil lamps’ Diesel oil burning trucks and gasoline cars and trucks and am going to stay away from electric golf carts pretending to be cars and trucks!

    Reply

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