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Threads 1 to 40 of 285

Forum: V8 Engine Tech

Technical discussion on all aspects of VAG 4.2 and 5.2 V8 tuning and tech. Sponsored by JH Motorsports.

JH Motorsports

  1. 4.0 TFSi strange noises

    Started by dragocz, 07-11-2025 11:58 PM
    strange noise
    • Replies: 0
    • Views: 132
    dragocz
    07-11-2025, 11:58 PM Go to last post

  2. 4.2 40V - Porting tips and is it worth it?

    Started by RS-SEX, 07-08-2025 05:13 AM
    • Replies: 0
    • Views: 181
    RS-SEX
    07-08-2025, 05:13 AM Go to last post

  3. Audi 4.2 40V (belt driven) transmission bolt patterns?

    Started by RS-SEX, 06-16-2025 05:25 AM
    • Replies: 0
    • Views: 754
    RS-SEX
    06-16-2025, 05:25 AM Go to last post

  4. Oil coming from boot of AC compressor shaft

    Started by nii_san, 06-03-2025 06:50 AM
    ac compressor, b8.5, rs5
    • Replies: 2
    • Views: 348
    WileyBrill
    06-06-2025, 04:40 PM Go to last post

  5. B7 4.2 V8 Factory A/C Compressor RPM

    Started by WileyBrill, 03-22-2025 08:36 AM
    • Replies: 1
    • Views: 1,879
    WileyBrill
    05-21-2025, 02:26 PM Go to last post

  6. Never seen, until,this past Wed AM - then WTF!

    Started by WileyBrill, 04-26-2025 04:36 PM
    • Replies: 1
    • Views: 356
    WileyBrill
    05-21-2025, 02:18 PM Go to last post

  7. B8.5 oil in drivers air box

    Started by Tummyshirt162, 02-26-2025 08:20 PM
    • Replies: 0
    • Views: 257
    Tummyshirt162
    02-26-2025, 08:20 PM Go to last post

  8. Unhappy 4.2 v8 Misfire in Cylinder Four

    Started by Happypopda, 02-04-2025 06:33 AM
    • Replies: 0
    • Views: 683
    Happypopda
    02-04-2025, 06:33 AM Go to last post

  9. S5 4.2 v8 water/meth injection for carbon?

    Started by Zingrox, 10-02-2017 06:46 PM
    • Replies: 25
    • Views: 12,246
    Schoona
    01-30-2025, 11:39 PM Go to last post

  10. Optimum Mileage Interval for Spark plug changes on V8 B6/B7, 55K mi seems too long.

    Started by WileyBrill, 11-30-2012 01:27 PM
    • Replies: 7
    • Views: 7,830
    WileyBrill
    12-26-2024, 01:47 PM Go to last post

  11. Flapper delete

    Started by Bhannah510, 09-16-2024 06:36 PM
    • Replies: 0
    • Views: 1,633
    Bhannah510
    09-16-2024, 06:36 PM Go to last post

  12. So Many JHM Supercharged Vehicles for Sale

    Started by wahpao, 02-24-2017 08:39 AM
    • Replies: 7
    • Views: 8,569
    RunninReds
    08-14-2024, 03:34 PM Go to last post

  13. Looking for good tutorial on removing the intake manifold on a B7 S4.

    Started by oleosanxez, 06-02-2024 11:31 PM
    intake manifold, manifold spacers
    • Replies: 0
    • Views: 2,847
    oleosanxez
    06-02-2024, 11:31 PM Go to last post

  14. Throttle Body Not Calibrating-S4 B7

    Started by Mar'd, 03-31-2023 10:37 AM
    • Replies: 2
    • Views: 3,025
    Mar'd
    05-14-2024, 07:33 AM Go to last post

  15. RS4 B8 Random Cold Start Issue (P000D/A - P0175/P0172 [232])

    Started by Totender7, 05-02-2024 08:45 AM
    • Replies: 0
    • Views: 1,154
    Totender7
    05-02-2024, 08:45 AM Go to last post

  16. C7.5 S7 Suspension not adjust in different drive modes

    Started by SirBreezy, 04-22-2024 10:01 PM
    • Replies: 0
    • Views: 1,045
    SirBreezy
    04-22-2024, 10:01 PM Go to last post

  17. 4.2 FSI (BAR) Oil leak

    Started by mithril, 02-06-2024 07:51 PM
    1 Attachment(s)
    • Replies: 0
    • Views: 1,040
    mithril
    02-06-2024, 07:51 PM Go to last post

  18. Resets of Oil Life program after oil changes - not working - Why?

    Started by WileyBrill, 01-25-2024 06:48 AM
    • Replies: 0
    • Views: 930
    WileyBrill
    01-25-2024, 06:48 AM Go to last post

  19. Need help with cylinder head bvj vs bar

    Started by Fattyneff, 01-07-2024 09:44 AM
    q7 4.2 bar bvj
    • Replies: 0
    • Views: 1,188
    Fattyneff
    01-07-2024, 09:44 AM Go to last post

  20. Exclamation Rs4 throttle body faults g69/g188 limp mode help!!

    Started by 1FastS4.Com, 04-28-2017 05:12 PM
    • Replies: 2
    • Views: 4,255
    audirari
    12-28-2023, 10:35 PM Go to last post

  21. New 4.2fsi long block from Audi

    Started by Mugelloblu42, 02-06-2023 09:29 AM
    • Replies: 1
    • Views: 2,786
    Bordom
    10-23-2023, 07:59 AM Go to last post

  22. Audi s5 b8 09 v8

    Started by Shabayaba, 09-26-2023 06:51 AM
    audi s5 b8 v8
    • Replies: 0
    • Views: 907
    Shabayaba
    09-26-2023, 06:51 AM Go to last post

  23. Camshafts rotating after removing locking tools

    Started by bferrell130, 04-21-2023 11:22 AM
    • Replies: 0
    • Views: 1,402
    bferrell130
    04-21-2023, 11:22 AM Go to last post

  24. Needing a Audi / RS4 Mechanic / Tech

    Started by Dzicch, 04-11-2023 04:50 PM
    • Replies: 0
    • Views: 1,252
    Dzicch
    04-11-2023, 04:50 PM Go to last post

  25. Ported JHM head noise--valve guides too short?

    Started by Andrew J, 03-12-2022 10:57 AM
    • Replies: 2
    • Views: 2,547
    DR.Death
    03-26-2023, 05:34 AM Go to last post

  26. ABZ V8 as a stand alone. Which wires do I need?

    Started by DR.Death, 03-25-2023 10:38 PM
    • Replies: 0
    • Views: 1,686
    DR.Death
    03-25-2023, 10:38 PM Go to last post

  27. No Crank no start , b6 s4

    Started by Rcryan7, 03-07-2023 11:20 AM
    1 Attachment(s)
    • Replies: 1
    • Views: 1,392
    oripaamoni
    03-16-2023, 09:22 AM Go to last post

  28. BAD BHF ENGINE REPLACED WITH BNK A6 4.2 ENGINE - NOW GETTING LIMP MODE / CAM CODES

    Started by derek76757, 03-02-2023 01:25 PM
    • Replies: 0
    • Views: 2,675
    derek76757
    03-02-2023, 01:25 PM Go to last post

  29. 2011 S5 4.2 cyl 1 misfire

    Started by Jaymehaze, 09-30-2020 08:35 AM
    1 Attachment(s)
    • Replies: 4
    • Views: 3,838
    philbegas
    11-18-2022, 07:01 AM Go to last post

  30. BNS repair manual??

    Started by Mugelloblu42, 01-24-2022 08:06 PM
    • Replies: 1
    • Views: 2,766
    WEC
    10-24-2022, 01:39 PM Go to last post

  31. What exactly is "active" about the factory active motor mounts (B6 S4)?

    Started by BigBrownDog, 03-28-2015 07:13 PM
    • Replies: 5
    • Views: 17,273
    Zolli
    10-17-2022, 04:38 PM Go to last post

  32. 4.2 intake flapper issue

    Started by B76767, 10-13-2022 08:26 AM
    • Replies: 1
    • Views: 2,335
    Zolli
    10-17-2022, 12:30 PM Go to last post

  33. RS7 exhaust

    Started by JpRS7, 10-10-2022 04:54 AM
    exhaust
    • Replies: 0
    • Views: 1,595
    JpRS7
    10-10-2022, 04:55 AM Go to last post

  34. B6 S4 Tune unknown!

    Started by jamboravr6, 09-05-2022 07:39 PM
    • Replies: 0
    • Views: 1,891
    jamboravr6
    09-05-2022, 07:39 PM Go to last post

  35. Touareg 4.2 AXQ timing belt screw up?

    Started by rickyw59, 06-20-2022 03:24 PM
    • Replies: 1
    • Views: 3,315
    rickyw59
    07-04-2022, 06:52 PM Go to last post

  36. Can't find this vacuum leak...

    Started by motionvega, 04-29-2022 08:42 PM
    • Replies: 0
    • Views: 2,490
    motionvega
    04-29-2022, 08:42 PM Go to last post

  37. 40V Swap - 987.1 Cayman SCHOOL ME HERE

    Started by bkwrzdub, 03-30-2022 10:34 AM
    • Replies: 3
    • Views: 7,275
    bkwrzdub
    04-12-2022, 09:14 AM Go to last post

  38. B6 S4; time for timing service?

    Started by Hydr0, 01-16-2022 09:03 AM
    2 Attachment(s)
    • Replies: 0
    • Views: 2,995
    Hydr0
    01-16-2022, 09:03 AM Go to last post

  39. B6 B7 Throttle body measurements needed!

    Started by Cgaines98, 12-10-2021 05:25 PM
    • Replies: 0
    • Views: 2,400
    Cgaines98
    12-10-2021, 05:25 PM Go to last post

  40. Misfire bank 1

    Started by Slicknick97, 10-21-2021 01:24 PM
    • Replies: 1
    • Views: 2,676
    Rol-co
    11-30-2021, 07:15 AM Go to last post

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