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Forum: 6.2L/6.5L Diesel - Upgrades & Service Questions Answered

Tech forum containing the best technical information about these engines. Please post in the related 6.2L & 6.5L forums. We'll transfer the best topic threads to this forum.

  1. Arrow Sticky Thread Sticky: 18:1 Compression Ratio

    Started by More Power, 11-16-2007 09:51
    2 Pages •
    1 2
    • Replies: 34
    • Views: 18,674
    More Power
    01-24-2008, 14:03 Go to last post

  2. Arrow Sticky Thread Sticky: 6.2/6.5 Cylinder Block Date Code

    Started by More Power, 09-07-2006 11:52
    3 Pages •
    1 2 3
    3 Attachment(s)
    • Replies: 51
    • Views: 26,768
    More Power
    04-04-2023, 11:26 Go to last post

  3. Arrow Sticky Thread Sticky: 6.2/6.5 Dyno Data

    Started by More Power, 10-16-2007 10:04
    • Replies: 13
    • Views: 11,246
    sctrailrider
    06-05-2012, 05:30 Go to last post

  4. Arrow Sticky Thread Sticky: 6.5 Girdle

    Started by More Power, 03-15-2007 12:36
    3 Pages •
    1 2 3
    4 Attachment(s)
    • Replies: 47
    • Views: 22,611
    93drw
    06-11-2017, 19:34 Go to last post

  5. Arrow Sticky Thread Sticky: 6.5 Precups - Power -OR- Economy?

    Started by More Power, 02-06-2007 14:52
    2 Pages •
    1 2
    • Replies: 36
    • Views: 16,254
    More Power
    12-17-2007, 20:53 Go to last post

  6. Arrow Sticky Thread Sticky: 6.5 TD Highway Mileage Poll by GMC Hauler

    Started by GMC Hauler, 04-02-2006 17:07
    3 Pages •
    1 2 3
    • Replies: 42
    • Views: 18,971
    Truckie117
    04-25-2008, 18:51 Go to last post

  7. Poll Sticky Thread Sticky: Poll: 6.5TD MPG Hiway mileage Poll!

    Started by Cowracer, 03-22-2006 16:16
    3 Pages •
    1 2 3
    • Replies: 59
    • Views: 22,753
    rustyk
    07-01-2011, 10:35 Go to last post

  8. Arrow Sticky Thread Sticky: Adjustable Turbo Wastegate Actuator

    Started by More Power, 02-14-2008 10:55
    2 Pages •
    1 2
    • Replies: 25
    • Views: 15,155
    More Power
    06-03-2011, 12:25 Go to last post

  9. Sticky Thread Sticky: Air flow, turbos, fuel and more?????s

    Started by quickv6, 10-10-2007 17:11
    • Replies: 5
    • Views: 5,127
    quickv6
    10-11-2007, 19:12 Go to last post

  10. Thumbs up Sticky Thread Sticky: Amg P400

    Started by More Power, 03-14-2008 23:52
    6 Pages •
    1 2 3 ... 6
    • Replies: 115
    • Views: 43,793
    JetBoater
    06-07-2015, 16:15 Go to last post

  11. Arrow Sticky Thread Sticky: AMG/GEP 506 Navistar Longblock ID

    Started by More Power, 11-26-2007 16:04
    2 Attachment(s)
    • Replies: 15
    • Views: 10,590
    More Power
    03-04-2014, 11:43 Go to last post

  12. Sticky Thread Sticky: AMG/GEP 6.5 blocks

    Started by Robyn, 08-10-2011 15:47
    2 Pages •
    1 2
    • Replies: 31
    • Views: 14,101
    Robyn
    03-28-2012, 16:59 Go to last post

  13. Arrow Sticky Thread Sticky: Billet & Forged Crankshafts

    Started by More Power, 04-19-2007 13:03
    4 Pages •
    1 2 3 ... 4
    1 Attachment(s)
    • Replies: 73
    • Views: 24,474
    Peter J. Bierman
    02-18-2008, 10:43 Go to last post

  14. Arrow Sticky Thread Sticky: Bolt Lug Pattern Measurement Guide

    Started by More Power, 06-25-2018 10:04
    • Replies: 0
    • Views: 3,938
    More Power
    06-25-2018, 10:04 Go to last post

  15. Sticky Thread Sticky: Boost/Compression Ratio Calculator

    Started by afgunn, 07-20-2007 17:13
    2 Pages •
    1 2
    • Replies: 33
    • Views: 126,785
    More Power
    01-14-2019, 12:04 Go to last post

  16. Arrow Sticky Thread Sticky: Bypass cooling for the 6.2/6.5

    Started by More Power, 11-17-2006 14:51
    4 Pages •
    1 2 3 ... 4
    1 Attachment(s)
    • Replies: 61
    • Views: 27,999
    More Power
    05-15-2017, 10:29 Go to last post

  17. Sticky Thread Sticky: Cooling Upgrades Techie Question

    Started by moondoggie, 09-28-2006 09:50
    3 Pages •
    1 2 3
    • Replies: 40
    • Views: 98,839
    More Power
    04-04-2020, 16:14 Go to last post

  18. Arrow Sticky Thread Sticky: Damper Bolt Tightening Fixture

    Started by More Power, 08-02-2008 13:37
    • Replies: 4
    • Views: 4,409
    john8662
    03-25-2011, 08:50 Go to last post

  19. Sticky Thread Sticky: Dtc P0251

    Started by mncguy, 07-18-2008 05:29
    • Replies: 3
    • Views: 3,929
    More Power
    07-18-2008, 10:48 Go to last post

  20. Arrow Sticky Thread Sticky: FSD/PMD Relocation Kits

    Started by More Power, 10-06-2009 13:35
    • Replies: 2
    • Views: 4,014
    More Power
    10-06-2009, 13:38 Go to last post

  21. Arrow Sticky Thread Sticky: Gear Drive vs Chain Timing Sets

    Started by More Power, 06-01-2009 13:49
    2 Pages •
    1 2
    • Replies: 25
    • Views: 18,129
    Robyn
    11-19-2021, 11:28 Go to last post

  22. Question Sticky Thread Sticky: Is it worth changing gears for better MPG's???

    Started by 16gaSxS, 06-19-2006 12:47
    7 Pages •
    1 2 3 ... 7
    • Replies: 137
    • Views: 30,460
    6.5 Detroit Diesel
    02-07-2008, 16:49 Go to last post

  23. Sticky Thread Sticky: Max fuel economy for the 6.5TD

    Started by More Power, 12-23-2004 15:31
    6 Pages •
    1 2 3 ... 6
    1 Attachment(s)
    • Replies: 115
    • Views: 34,211
    Robyn
    06-07-2022, 05:52 Go to last post

  24. Arrow Sticky Thread Sticky: New 6.2/6.5 Tech Forum

    Started by More Power, 07-27-2006 14:35
    • Replies: 10
    • Views: 7,763
    moondoggie
    10-12-2007, 08:03 Go to last post

  25. Question Sticky Thread Sticky: Performance 6.5 Injectors

    Started by More Power, 03-10-2007 16:58
    5 Pages •
    1 2 3 ... 5
    • Replies: 89
    • Views: 34,451
    AllThumbs
    10-22-2010, 12:38 Go to last post

  26. Sticky Thread Sticky: Useful part numbers of hard to find items

    Started by Robyn, 10-09-2011 16:41
    • Replies: 0
    • Views: 3,460
    Robyn
    10-09-2011, 16:41 Go to last post

  27. Arrow Sticky Thread Sticky: Will a factory 6.5 turbo system work on an 80's 6.2?

    Started by More Power, 06-21-2007 14:53
    • Replies: 18
    • Views: 10,884
    suburban-marco
    11-12-2013, 12:10 Go to last post

  1. Thumbs up Single Mass Flywheel for 6.2L/6.5L Diesel

    Started by More Power, 06-15-2023 09:47
    clutch, flywheel, manual transmission
    • Replies: 3
    • Views: 2,037
    More Power
    10-02-2023, 09:46 Go to last post

  2. Tty bolts vs studs.....yeah....another thought.

    Started by Robyn, 12-24-2023 06:02
    • Replies: 6
    • Views: 584
    Kennedy
    02-13-2024, 09:53 Go to last post

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