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theDuff

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Posts posted by theDuff

  1. 21 hours ago, 7Mary3 said:

    If the bore spacing is 117.60 mm (anyone know for sure?) and the bore is 107.2 mm, that gives you 10.4 mm between cylinder bores.  Plenty for a rebuild, but not a real big displacement increase.  I assume the block is a siamese cylinder bore casting because they cut a cooling passage slot in the deck.  That slot looks a little scary, might compromise head gasket sealing if you did something crazy performance-wise to the 7.3L.  You can see the slots in this video around 1:19:

     

      

     

    You are correct. Those saw cuts are bad news and Ford knows it. Hopefully they revised it to a drilled bore instead of the saw cut like the 1.5 update. Lots of 1.5 short blocks are being installed because of their sawcut leading to coolant ingestion. 

  2. 3 reports. Yes, 3. Out of 841,000. That is .00036%.

     

    Yeah it sucks if you are one of those 3, but dammit how perfect does a car have to be? Geez!

     

    Seriously, how can you put a more stringent process in place when a statistically insignificant number of failures are taking place? And we have no insight into what caused these failures.

    It's way more then 3. There have been 3 complaints to the NHTSA, yes, but that isn't every failure. Our service department has fixed several. I've seen other reports on Ford technician forums. This is a way bigger problem then .00036%.

  3. Be warned! The TPMS sensors are only compatible with wheels that have .452" valve stems. The trailer I just tried installing this accessory on had .625" valve stems. It seems (through my limited research) that the majority of trailers use this oversize stem. We are currently looking for a work-around. There is nothing in the pre-sales literature about this requirement. We have contacted Ford through several avenues and the answer is the same: .625" valve stems are not supported.

  4. What, as soon as its out of warranty fleets stop coming to the dealer for service? I beg to differ. Dealers service high mileage fleet vehicles all the time!

     

    What is your source for all these bearing revisions? How can you be so sure that these "revisions" came about because of high failure rates?

     

    The head gasket issue was a minor oil leak coming from the rear of the bank one cylinder head. This was across all vehicles, not just trucks.

  5. The PTU is not a viscous coupling. Its basically a ring and pinion bolted to the transaxle. The viscous coupling is attached to the rear axle.

     

    To go along with fordtech1's uneven tire wear comment I have seen uneven tire wear (front to rear) prematurely break down the lubricant on utility interceptors in as low as 30,000 miles.

     

    I just wish they had a higher lube capacity. Its only .56 quarts! I'm no engineer, but I feel a higher capacity may help. It won't help if the rear tires are bald and the fronts are new though.

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