HT4100 4.1, 4.5, 4.9
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HT4100 4.1, 4.5, 4.9 in Cadillac forums : Cadillac Owners Forum, This forum is to discuss the newer aluminum block Cadillac engines.
  1. Sticky Thread Sticky: OBD I codes for 4.x Engines

    Started by DaveSmed, 09-20-04 01:50 AM
    • Replies: 0
    • Views: 68,496
    09-20-04, 01:50 AM Go to last post
  1. 4.5 oil pan removal

    Started by acree25, 11-20-03 04:35 PM
    • Replies: 3
    • Views: 1,042
    05-26-19, 04:57 AM Go to last post
  2. 92 Deville runs rough. See pics

    Started by dtnel78, 03-13-19 08:37 PM
    • Replies: 7
    • Views: 202
    05-01-19, 08:37 PM Go to last post
    • Replies: 1
    • Views: 60
    03-30-19, 08:28 AM Go to last post
  3. 4100 issue, need help!

    Started by BigG3, 01-21-19 02:19 PM
    • Replies: 4
    • Views: 271
    02-20-19, 12:06 PM Go to last post
  4. Dull clattering at idle

    Started by Crackillac, 02-14-16 11:25 PM
    • Replies: 3
    • Views: 483
    02-20-19, 11:56 AM Go to last post
  5. 1992 DeVille 4.9 Oil Pan Removal

    Started by FiftySeriesSixtyTwo, 02-03-19 10:24 PM
    • Replies: 2
    • Views: 213
    02-10-19, 08:10 AM Go to last post
  6. Crank Damper Pulley

    Started by RoadHazzard, 01-19-19 11:24 AM
    • Replies: 0
    • Views: 109
    01-19-19, 11:24 AM Go to last post
    • Replies: 1
    • Views: 5,710
    11-24-18, 06:07 PM Go to last post
  7. Replace alternator on 4.9 seville 1991

    Started by Laurent300c, 09-26-18 04:53 PM
    • Replies: 2
    • Views: 199
    11-24-18, 05:16 PM Go to last post
  8. 4.9L Fuel Economy

    Started by Big_Cadillacs, 12-10-05 10:59 PM
    3 Pages
    1 2 3
    • Replies: 30
    • Views: 12,261
    07-04-18, 02:28 PM Go to last post
  9. 1985 Fleetwood 4.1

    Started by weib1964, 05-12-18 07:04 PM
    • Replies: 0
    • Views: 302
    05-12-18, 07:04 PM Go to last post
  10. Questions about my 84 Eldo with coolant leak.

    Started by Gnawzzy, 05-05-18 04:23 AM
    • Replies: 2
    • Views: 333
    05-05-18, 11:02 AM Go to last post
  11. 4.1HT fwd to rwd

    Started by 4.1crash, 04-10-18 03:50 PM
    • Replies: 4
    • Views: 473
    04-27-18, 12:14 PM Go to last post
  12. Code P039 Current?

    Started by jaugustavo, 10-30-05 03:19 PM
    • Replies: 6
    • Views: 8,729
    02-15-18, 06:19 AM Go to last post
    • Replies: 5
    • Views: 536
    12-30-17, 08:14 PM Go to last post
  13. drain all coolant

    Started by jesper, 12-19-17 05:51 AM
    • Replies: 0
    • Views: 461
    12-19-17, 05:51 AM Go to last post
  14. Fuel Imbalance (Left and Right Bank)

    Started by gojo7227, 08-24-10 11:57 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 6,500
    12-15-17, 10:15 PM Go to last post
  15. 91 eldorado 4.9 no heat

    Started by 91Eldorado, 11-18-17 12:27 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 802
    11-28-17, 10:25 AM Go to last post
    • Replies: 0
    • Views: 322
    10-20-17, 01:28 AM Go to last post
  16. car drove with low power and hard shifts

    Started by jesper, 08-13-17 02:50 PM
    • Replies: 12
    • Views: 406
    10-09-17, 06:05 PM Go to last post
  17. Question Mind of its own

    Started by OldHippy, 09-25-17 11:11 AM
    • Replies: 1
    • Views: 306
    09-28-17, 05:29 PM Go to last post
  18. HT 4100 Engine is it that bad

    Started by thewill02, 04-23-04 12:07 PM
    4 Pages
    1 2 3 4
    • Replies: 50
    • Views: 21,349
    09-24-17, 04:53 PM Go to last post
  19. 94 4.9 PFI raw gas from exhaust

    Started by subperceptual, 09-21-17 10:22 AM
    • Replies: 4
    • Views: 378
    09-22-17, 07:50 PM Go to last post
  20. 90 seville 4.5 pfi timing problems

    Started by 83CADMAN, 09-17-17 08:32 PM
    • Replies: 2
    • Views: 329
    09-21-17, 06:04 PM Go to last post
  21. Life expectancy for 4.9 and 4T60E

    Started by 100, 08-13-06 10:10 PM
    4 Pages
    1 2 3 4
    • Replies: 58
    • Views: 16,187
    08-09-17, 07:18 AM Go to last post

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