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  1. Scrappycrow

    When is it not worth it to repair?

    For me, it's when the time/effort/$$$ can't be justified for the purpose/use of the vehicle, even if something is doable. If your Yukon is otherwise in good shape, suits your needs, doesn't have known impending issues, and you can swing the expense and downtime to swap the engine or otherwise...
  2. Scrappycrow

    Is Oil Analysis Helpful In Providing Indication of Impending AFM Lifter Failure?

    Same. I've only just started with my Tahoe. I started doing them when I bought my Dad's former AMC Spirit track car from his estate. With an 8-quart pan, two filters, an oil cooler, and now a 3-quart Accusump, that's something that: 1) I don't want to change unnecessarily, and 2) I really...
  3. Scrappycrow

    Is Oil Analysis Helpful In Providing Indication of Impending AFM Lifter Failure?

    My mention of the chain was just an example, in terms of "if you see this stuff in the oil, you can't tell because this other thing will result in the same stuff." I don't have concerns about the chain wearing. Agreed, I'm not talking about a single analysis, I'm referring to trends. You've...
  4. Scrappycrow

    2011 Yukon XL - Hot while towing, fluctuating oil pressure, general weirdness.

    You mean "short" gear. The easy way to remember the difference is that "short" gearing is for "low" speeds and "tall" gearing is for "higher" speeds.
  5. Scrappycrow

    Is Oil Analysis Helpful In Providing Indication of Impending AFM Lifter Failure?

    Y'all, First off, I know I'm going to come across as a bit ornery by saying this, but please answer the question I'm asking, not anything else. Specifically, I do not want or need answers in the vein of: * That disabling AFM by whatever means (dongle, tuning) will extend the life of the AFM...
  6. Scrappycrow

    TOPDON Scanner. Anyone have one?

    Thank you for the update! That's just the kind of feedback I was looking for. I don't have an immediate need, as I have a Snap-On Solus that's updated to 2013 (and my Tahoe is a 2013). The Solus also covered my girlfriend's 2009 Prius, but now she has a 2023 Prius. So, I am looking for...
  7. Scrappycrow

    TOPDON Scanner. Anyone have one?

    @SpareParts, any update for us on the ArtiDiag900 Lite or the RLink J2534? The ArtiDiag900 Lite is on sale at Topdon and Amazon for $299.00 as of this writing, so I was wondering if I should jump on one now. Thanks in advance!
  8. Scrappycrow

    Juitree or phoenix automotive tablet

    LOL, that instrument cluster looks like something you'd see dolphins jumping across! :rotflmao:
  9. Scrappycrow

    Alternator Upgrade Suggestions?

    One-way clutches were first implemented for diesels because drastic spikes/drops in RPM were causing alternators' internal inertia to damage components. Thus, the alternator only got a "kick" when RPM was increasing and not a "jerk" when RPM was decreasing. The reason they were implemented on...
  10. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    After looking at various pics of the pumps on line, I must've been thinking of another variable-displacement vane pump, because you are correct -- there's no piston, just a spring. The spring works against the output pressure from the other direction on the outer wall on the outer ring...
  11. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    A piston moves the outer ring, causing the outer ring to become more eccentric or less eccentric relative to the shaft. If the ring and shaft were perfectly concentric, there would be no pumping, and as eccentricity increases, the volume of each "compartment" increases, thus increasing output...
  12. Scrappycrow

    Torque converter recommendation and trans tune

    A benefit of the LUK that hasn't been mentioned in this thread yet is that because it's new, you don't have to deal with sending the core to the manufacturer. A used one is heavy and messy, and IIRC you have to pay for the shipping.
  13. Scrappycrow

    What are ya’lls plans with engine/chassis when it’s quitting time?

    I already have three other project vehicles, so my Tahoe will be staying pretty close to stock when the time comes to do significant refurbishing. I'll stick with a 5.3, but with a VVT non-AFM cam, with minor upgrades for the 6L80.
  14. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    I'm not in the market for one since I've already fabricated my own, but ran across this one. Is this made for Orangutans? :rotflmao:
  15. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    If that would allow the battery to slide (whether due to a loose clamp or during a crash), I would avoid doing that.
  16. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    I would not use JB Weld at all, much less "fill" the area with it. You'll end up with different contraction/expansion rates simply due to different materials, and also different contraction/expansion between that area and adjacent areas, as the JB Weld fill would have thermal inertia due to...
  17. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    A benefit to HPTuners is that once you have the dongle, using it to help friends only costs them the module license fees. For example, a buddy with a 2013 Silverado only wanted his AFM disabled. So, I was able to do it for him for $100 as opposed to him buying something like a Range disabler...
  18. Scrappycrow

    Replacing 4 year old Genuine GM Waterpump w/41K miles

    Note the lack of heater hose fittings.
  19. Scrappycrow

    Replacing 4 year old Genuine GM Waterpump w/41K miles

    None that are a direct fit, unfortunately.
  20. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Thanks! No worries on the timing. :)
  21. Scrappycrow

    My 2007 Tahoe EATS Optima AGM batts!

    For the sake of folks who search on titles, would you mind correcting at least the title to "AGM," please?
  22. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    What particular model are these?
  23. Scrappycrow

    Useless Information

    I like the overall concept and have done similar on other vehicles, but a better implementation would be to use a shouldered bolt that threads in from outboard into a tapped hole, with a thin locknut on the backside. Note that he does say he used a shouldered bolt, but that's erroneous -- he...
  24. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    IMO, the best tool for this is a "scoring blade" that you pull along and progressively cut out curlicues until you break through (maybe 6-8 pulls). I have a Stanley 11-942 blade in a utility knife handle, but that particular blade is unfortunately discontinued. Pic from eBay auction:
  25. Scrappycrow

    What did you do to your NNBS GMT900 Tahoe/Yukon Today?

    Thanks! It shows mine was completed in December 2021, two years before I bought it.

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