Well That's Not Good! Nissan Titan XD Cummins 5.0 Turbo Diesel V8 Teardown. A Costly Failure!

Comments · 1.7K

• MH

  @mhymyk4022 · 3 years ago

  The sound of a consumable part getting thrown across the shop after a "it's in pretty good shape" quote never gets old

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• CL

  @clys69 · 3 years ago

  The injection pump was loose because he tried removing it before selling the core to you. Those three bolts are actually studs - the pump is held on by nuts on those studs which doesn't require access to the geartrain side of the pump. What the PO didn't account for was having to take the drive nut off the front of the pump and likely gave up, leaving the pump loose like that.

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• BR

  @BReal-10EC · 3 years ago

  Back in the early 90s I worked at a small factory making wood trusses. They had a large property for storing material and built trusses. One guy (Cherokee) had a nice looking late 70s 4x4 C/K Chevy truck sitting out there. He also had a 350 sitting.. waiting until he had enough cash to pay somebody to do the swap. When he finally did... the plant mechanic guy (Mike) found out Cherokee had stored the engine just bare in the weather *without plugs*. Mike took the heads off and cleaned it all up with sandpaper and whatever else he had in that field, put it back together, installed it and the thing ran like butter. Some people are just magic.

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• OS

  @oscarbravo9009 · 2 years ago

  The 5.0 Cummins V8 that comes out of the XD Titan is ~ $20,000 for a new long block.  I hear these engines are struggling with failures at relatively low miles (for a diesel plant) despite its legendary origins.

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• MA

  @marshmower · 3 years ago

  "Spins nice. No damage to the impeller." "WHAmmmmmm!!"

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• PA

  @patrickm3534 · 3 years ago

  The guys in the Titan XD  group will love this.

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• DR

  @DrAppleCrispies · 3 years ago

  "Looks nice, no damage to impeller" proceeds to lob into scrap lmao I laughed so hard. 😆

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• JE

  @je1279 · 3 years ago (edited)

  "It generally helps to get all the bolts out. That's been my experience" 🤣

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• TH

  @TheEricwhittemore · 3 years ago

  Former Titan XD diesel owner here. I bought my 2018 Titan XD midnight edition new in September of 2018. Had 190 miles on it at delivery. It was an absolute amazing truck and handled every load I put behind it amazingly. In January of 2022 it started to sound different, like a knock rather than a clatter that a diesel typically has. This was at 47,000 miles. I took it to Nissan numerous times and told them something wasn’t right. They had corporate specialists come in and look at the truck and I was told numerous times it was fine. In May of 2022, with my fully loaded 8.5x20 enclosed trailer attached, the crank snapped at 55,000 miles. It was violent. Nissan replaced the engine at no cost to me. Total bill was over $22k!  I sold the truck to Carmax 7 days after getting it back. Really miss the truck, but to much of a risk when using it at a commercial vehicle.

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• FA

  @fatherjoose · 3 years ago

  I LOVE the recent diesel content. A lot of people are undereducated in the operations of a diesel engine and just tearing it down provides a HUGE understanding

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• TE

  @TestECull · 3 years ago

  <a href="https://www.youtube.com/watch?v=ce7NBhfOYFc&amp;t=2406">40:06</a> It&apos;s probably torsional vibration. You see this with the Ford 300 I6. That thing is FUCKING INDESTRUCTIBLE, and the stock crank is more than happy to spit out over a thousand horsepower if enough snails are hung off the side. But if you rev it much past 6500 that 3 foot long crank just vibrates itself clean in two. Starts resonating like a guitar string and POING!. Straight six Cummins diesels in Ram trucks are known to do this when revved much past the factory redline as well. Fix is the same in both applications: Fit a harmonic balancer that is capable of changing the resonance so the crank doesn&apos;t explode itself.<br><br> It&apos;s also why those straight eights you see in cars from the 1930s, 40s, early 50s rarely revved much past 3,000RPM. The cranks were so long that they would start resonating, snap themselves in half.<br><br>V8s tend to be much more resistant to this failure mode because their cranks are much shorter(And thus resonate at much higher frequencies), but given this engine was &apos;tuned&apos; it&apos;s entirely possible that it simply revved high enough to vibrate the crank apart. <br><br>Where this crank failed also lends credence to this. A crank that fails due to excessive torque on it is usually going to shear &nbsp;the snout or the flexplate flange off, depending on which end was connected to the overload. A crank that fails due to harmonic resonance tends to fail right there where it necks down into a journal somewhere.<br><br>My best guess for this engine&apos;s cause of death is operator error. Excessive RPM due to the operator deleting/raising the rev limiter and pushing the engine too hard without making the appropriate modifications to support that higher redline.

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• MA

  @marine2ful · 3 years ago

  I test drove one of these and a 5.6 gasser on the same day with my 18 ft boat, and there was absolutely no reason to deal with emissions, starting in -30, and high fuel prices. That 5.6 is a beast of a gasser.

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