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  1. SnowDrifter

    05 Escalade just hit 100k miles, ok to change tranny fluid?

    Wipe the dip stick off very, very, very well Then pull a sample Note the smell, put it on a white surface and look at it under light (air filter box sticker) Exclusion criteria: - Floating particles - Burnt smell - Dark enough to be confused with engine oil - Milky in appearance If none of...
  2. SnowDrifter

    Oil Analysis Results - 5000/170k mi

    Figured I'd do a health check on my rig. Mainly just to poke at the casttech heads and see how those are. But also to see how my weird maintenance habits perform in the real world. They came out pretty good, so, I figure I'll share my ways with y'all. Do with that what you will. - Oil pump...
  3. SnowDrifter

    In 4WD or not?

    A quick note about 4wd in our vehicles: The front end is disconnected twice. Once from the transfer case, and once again inside the front differential. In 2wd, you can just grab the front drive shaft and spin it with the vehicle in park and on the ground. That also means you can tell from a...
  4. SnowDrifter

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Took 'er up to find some snow! ft. bonus dog got brainfreeze
  5. SnowDrifter

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Nokian WRG4 The ones I had previously were the WRG3 SUV. They had a directional V tread on them with a 50k mile tread life. I got 40k on them before I opted to replace them at 4/32, so, fair enough. New ones have an inside-outside omnidirectional pattern with a 60k tread life. New pattern...
  6. SnowDrifter

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    New shoes just in time for winter They totally redesigned the tread on these. They're a hell of a lot quieter on the freeway. Will need to see how they do in snow to make a final decision Also changed oil. Pulled a sample to send off to Blackstone. See how things look and put my money where...
  7. SnowDrifter

    What Oil To Use in My 6.0 Denali

    35 at idle is perfectly dandy It's my opinion that >30 hot idle is just dandy on these vehicles. 25 is where I start looking for issues. Even though lower is technically 'in-spec,' it will anecdotally cause problems. m1 5w30 is on the 'thinner' side, having a viscosity of 10.37cSt as per...
  8. SnowDrifter

    What Oil To Use in My 6.0 Denali

    The prevailing wisdom used to be that higher ZDDP levels, a zinc + phosphorous based high pressure anti wear additive, found in diesel oil, would poison the catalytic converter in gasoline engines. Given that pretty much all modern diesels have cats though... I'm not sure how accurate that is...
  9. SnowDrifter

    What Oil To Use in My 6.0 Denali

    Fram has a wild product line. I wouldn't touch their low end glued paper filters (regardless of how many people on BITOG preach them) with a 10ft pole. But their ultra synthetics? I'd put them on the same pedestal as Amsoil. Honestly, even above. Has larger flow holes than the amsosil units...
  10. SnowDrifter

    What Oil To Use in My 6.0 Denali

    Not without knowing how loaded the filter is If I'm that strapped for cash, tbh, I'd rather put cheap oil in and change the filter anyway. Even the best lubricants will do no good if there's particulates floating around. I'll 'shop down' on the oil before I do the filter, to meet a budget. IF...
  11. SnowDrifter

    What Oil To Use in My 6.0 Denali

    I run some euro spec castrol 0w40 in all weather. From negatives, to 100's. Engine seems to like it. Going to be getting an analysis done in the coming weeks so I can quantify it
  12. SnowDrifter

    Anyone with a Champion radiator and using Dexcool?

    I see you too are a man of class fwiw I use phoat in mine Can be found branded as honda coolant Obligatory warning to flush the system several times with distilled water. Do it until you think you're done. Then do it 2 times more. You definitely do NOT want any side reactions to happen on...
  13. SnowDrifter

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

  14. SnowDrifter

    AGM battery recommended?

    I tend to prefer AGM... But that's use-case dependent. AGM is more friendly to lower temps, vibration, and deeper discharges without hosing the battery. They also tend to (but not always) have some lower internal resistance and will charge up quicker for short trips. Fits me better If none of...
  15. SnowDrifter

    '01 Burban high oil PSI and crappy MPG's ??

    I mean I run a 'thin' 0w40 in mine year-round. Thin, because Xw40 has a viscosity range and this is at the bottom of said range. Not much more than a 'thick' xW30. The whole 'thick oil for the summer' thing doesn't really hold weight. These engines aren't air cooled. They regulate their...
  16. SnowDrifter

    10 psi when warm

    Good idea! See if you can reverse-flow it. Or maybe even shove a boroscopic camera up there if you have one
  17. SnowDrifter

    10 psi when warm

    Yeah the PID config looks correct. Was hunting if there was a typo in the equation. If you do the cam bearings, HAVE THEM LINE BORED after install. These engines have a small, though non-negligible chance of spinning the cam bearings if this step is skipped. The block isn't quite as straight...
  18. SnowDrifter

    10 psi when warm

    What's your config for the pid? Iirc there's a port on the front left side of the block that's a leftover from machining. I'm quite curious what the oil pressure is there.
  19. SnowDrifter

    10 psi when warm

    Yeah that is very not ok The behavior of it.... Closer to a linear increase at low rpm. Logarithmic when higher. If the bearings were blown but all else was OK, I would expect a +/- linear increase up to the oil pump bypass valve opening. hmm..... I want to verify where you placed the...
  20. SnowDrifter

    Alternator Temperature?

    Yeah 140 is fine. Operating range for an alternator exceeds the operating range for the human body :) Back in my audio days, we'd get alternators so hot you could sizzle water on them. Had fans set up to blow cool air over them The windings are generally rated >150c and diodes >180c
  21. SnowDrifter

    10 psi when warm

    Same pump I have Let's make a thread and dig into it over lunch?
  22. SnowDrifter

    10 psi when warm

    Both, and neither So it can increase backpressure against the oil pump. If the pressure builds up enough, which reduces flow through the engine because of the pump's own bypass valve, then you end up with a net decrease in oil volume which will appear as low pressure on the sending unit, even...
  23. SnowDrifter

    10 psi when warm

    Skip to 2:30. Basically just remove by any means necessary
  24. SnowDrifter

    10 psi when warm

    Not a good one. But it's accessible by taking off the oil filter. It's a circular press fit doohickie Of note: that's only for our 'older' engines without cylinder deactivation. The newer ones (07+) have a different system that bleeds oil back into the sump during 4 cylinder mode.
  25. SnowDrifter

    10 psi when warm

    Before we start looking at a rebuild, I'd like to do some diagnostics. Here's what I'm trying to get to: Oil pressure vs. rpm: 10psi is well below bypass valve threshold in the oil pump. I would expect the pressure to raise linearly with engine RPM. If it does not, that would suggest a pickup...

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