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  1. donjetman

    Oil Viscosity trial and error

    Both the pcv valve and the valve cover??? I guess one could, but that seems redundant. I installed only the GM updated/upgraded 12570427 valve cover (per GM TSB# 10-06-01-008M...
  2. donjetman

    I want to replace my ignition coil, which one do you recommend Tahoe 5.3 2007

    If it was robbing very much power it would break or pitch off the little ac belt.
  3. donjetman

    Bought core block

    If I'm seeing what I think I'm seeing (4th lobe down)?? that cam is junk.
  4. donjetman

    Oil Viscosity trial and error

    By now your piston rings are stuck. Do a piston/combustion chamber soak. Worked for me 5 yrs & 65k miles ago. Still going strong and no consumption. Here's a thread I did back then: https://www.tahoeyukonforum.com/threads/afm-piston-soak-top-cleaner.132134/#post-1650558 also improments have...
  5. donjetman

    Bought core block

    @lspann3525 feeler gauge is cheapest tool to check thrust clearance. I wouldn't use that crankshaft with scratches in it that bad. It you have it turned .010" and it cleans up? then great.
  6. donjetman

    '08 Tahoe 4x4 Motor Mount Education

    No, I might tackle this project this summer if it floats to the top of my lists :)
  7. donjetman

    Lake Speed Jr, Oil Additives = Snake oil (video)

  8. donjetman

    Probably need new O2 sensors?

    Pics are in the following thresd: https://www.tahoeyukonforum.com/threads/lifter-tick-when-cold-berryman-b12.120184/page-2#post-1469315
  9. donjetman

    Building A 1,000HP Capable 6R80/6L80 Trans

    https://www.dragzine.com/tech-stories/what-goes-into-building-a-1000hp-capable-6r80-transmission/ @NickTransmissions
  10. donjetman

    Probably need new O2 sensors?

    Three of the 4 corners on our engine have a broken exhaust manifold bolt. I installed: Exhaust Manifold bridge clamp, back driver side – APDTY brand # 028218 - amazon and Exhaust manifold bridge clamps, frt driver side & back pass – APDTY brand # 028253 - amazon
  11. donjetman

    Problem going backwards

    @NickTransmissions
  12. donjetman

    IMPORTANT: The Chronicles of Low Oil Pressure by 07burb

    Did you drop the oil pan and change the $5 oil pump pickup tube o-ring?
  13. donjetman

    Turbo and adding snow performance

    E85 is cheap high octane race fuel.
  14. donjetman

    Short block purchase

    I removed all the spark plugs and oil pan drain plug, squirtted in a few ounces of the solvet in each SP hole. Then every 12 hrs or so put a socket on the crankshaft bolt a moved the crank back a forth a little, then replenish ea cylinder with solvent again. After 48 hrs or so I put towels over...
  15. donjetman

    20-50 oil is Thicker than 75-90 gear oil

    Don't believe it? Watch this: and here's the chart:
  16. donjetman

    Fuel Pump Module????

    07 Yukon Denali w/stock 6.2L L92 w/195k corrosion free miles. No DIC or CEL. It runs great. BUT the fuel gauge is all over the place. And the pump is 17 yrs old. I'm dropping the tank and replacing??? It's my understanding the fuel level sending unit is part of the fuel pump module. Correct me...
  17. donjetman

    Fixing for a friend

    The 07 6.2L Yukon Denali, and many other GM products of the era, came from the factory with a poorly designed pcv/valve cover on the driverside. In 2014 GM finalized a Technical Servce Bulletin TSB 10-06-01-008M that addresses the valve cover/pvc and several other problems. The poorly designed...
  18. donjetman

    Engine knock and don’t know what it could be

    you need to record a short sound/video clip, load it on youtube, then post the link back here.
  19. donjetman

    Engine Used Oil Analysis Report & Filter Guts

    In the last year I purchased the red GSTP brand oil filter cutter on amazon $25, and I like the red one better than The blue one that I've had for 25 yrs (aircraft supply).
  20. donjetman

    GM Tranny & LS Engine Swap Resource-Free eBooks

    https://auto-guild.com/
  21. donjetman

    Engine Used Oil Analysis Report & Filter Guts

    Yes, a lot of them No, if I recall its a Mopar 3.6L gasoline in the SF bay area. Nope, Fram Ultra Here's the BITOG thread, 33k miles: https://bobistheoilguy.com/forums/threads/dodge-durango-3-6l-hpl-ck-4-5w-20-33-300-miles-on-oil-173-000-miles-total.377756/
  22. donjetman

    Yet another Yukon with engine tick and low oil pressure

    Here's a video for ya:
  23. donjetman

    Engine Used Oil Analysis Report & Filter Guts

    There's someone on BITOG that has gone 30,000 miles between changes with his hotshot delivery car using one of the HPL off the self oils. And there are plenty of others doing extended oil change intervals. The best oil chemistry is not found on the shelves of brick and mortar retailer. I have 6...
  24. donjetman

    Oil leak rear main seal maybe????

    I changed my rear main seal, torque converter, etc etc etc 5+ yrs ago and 60 k miles ago. Its still going strong: https://www.tahoeyukonforum.com/threads/rear-main-seal-job-pan-etc-07-yukon-denali-6-2.108334/
  25. donjetman

    Engine Used Oil Analysis Report & Filter Guts

    I have run Amsoil many times in my vehicles since 2009. That's when I became a preferred Amsoil customer. It's good stuff. Here's a thread I did when I ran it in my Denali not long ago...

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