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: 53,923
    09-20-04, 01:50 AM Go to last post
  1. 4.9 High NOx, Failed Smog, stumped and need help!

    Started by CADDCT‎, 04-03-16 08:56 PM
    • Replies: 7
    • Views: 319
    05-23-16, 05:09 AM Go to last post
  2. Minimum Air Settings for 82 Cad 4.1 V8 HT4100

    Started by hotrodjohn71‎, 04-19-16 01:11 PM
    • Replies: 2
    • Views: 154
    05-19-16, 10:32 AM Go to last post
  3. HT 4100 oil pan capacity question

    Started by Duane Hayes‎, 01-11-13 09:21 PM
    • Replies: 8
    • Views: 2,374
    05-14-16, 05:08 PM Go to last post
    • Replies: 1
    • Views: 138
    04-13-16, 07:22 PM Go to last post
  4. Surging Idle on 82 Cad Fleetwood

    Started by hotrodjohn71‎, 04-07-16 07:18 PM
    • Replies: 8
    • Views: 198
    04-10-16, 10:21 AM Go to last post
    • Replies: 1
    • Views: 121
    04-03-16, 04:56 AM Go to last post
    • Replies: 1
    • Views: 119
    03-31-16, 11:10 PM Go to last post
  5. 82 Coupe DeVille 4.1 Belt Replacement

    Started by 82_CoupeDeville‎, 03-31-16 10:49 PM
    • Replies: 0
    • Views: 115
    03-31-16, 10:49 PM Go to last post
  6. HT4100 A/C bypass diagram

    Started by Datboisheed803‎, 02-12-16 11:14 PM
    • Replies: 2
    • Views: 231
    03-30-16, 03:33 PM Go to last post
  7. How do you convert 80's model to R134

    Started by 87allante4.9swap‎, 09-02-09 04:46 PM
    • Replies: 10
    • Views: 1,284
    03-29-16, 03:50 PM Go to last post
  8. Boosting HT4100 Performance

    Started by DrDave‎, 02-21-05 04:50 AM
    2 Pages
    1 2
    • Replies: 27
    • Views: 11,830
    03-29-16, 03:48 PM Go to last post
    • Replies: 2
    • Views: 189
    03-29-16, 02:39 AM Go to last post
    • Replies: 1
    • Views: 202
    03-21-16, 08:28 PM Go to last post
  9. Cooling fan start 4.9

    Started by Pjotr‎, 03-14-16 08:50 AM
    • Replies: 1
    • Views: 168
    03-16-16, 08:45 PM Go to last post
  10. Water Pump Inlet Repair help

    Started by Hamspiced‎, 06-17-08 12:56 AM
    • Replies: 14
    • Views: 5,979
    03-09-16, 10:27 PM Go to last post
  11. Suddenly Won't start, no Spark, 1985 Eldorado

    Started by jhcatlin‎, 02-15-08 12:18 PM
    2 Pages
    1 2
    • Replies: 19
    • Views: 7,522
    03-09-16, 11:35 AM Go to last post
  12. Torque, harmonic balancer 4,9

    Started by Pjotr‎, 03-05-16 02:59 PM
    • Replies: 3
    • Views: 215
    03-07-16, 03:04 PM Go to last post
  13. 1993 4.9 O2 sensor locations ?

    Started by Joegolden‎, 03-04-16 10:08 AM
    • Replies: 2
    • Views: 167
    03-06-16, 10:51 PM Go to last post
  14. HT4100 SandRail Dune Buggy

    Started by j1mmy420‎, 02-26-16 07:10 PM
    • Replies: 6
    • Views: 347
    03-05-16, 10:44 PM Go to last post
  15. 4100 service now light

    Started by baldizzone‎, 10-03-03 01:36 PM
    • Replies: 13
    • Views: 4,546
    03-02-16, 05:18 PM Go to last post
  16. 1992 STS 4.9 poor throttle response?

    Started by Black92STS‎, 03-01-16 02:12 PM
    • Replies: 1
    • Views: 147
    03-02-16, 11:34 AM Go to last post
  17. 4.1 power problem

    Started by Datboisheed803‎, 02-18-16 01:36 AM
    • Replies: 4
    • Views: 322
    02-24-16, 06:13 PM Go to last post
  18. Dull clattering at idle

    Started by Crackillac‎, 02-14-16 11:25 PM
    • Replies: 1
    • Views: 194
    02-19-16, 03:22 PM Go to last post
  19. 93 deville cooler lines

    Started by still_walkin‎, 02-08-16 05:01 PM
    • Replies: 6
    • Views: 276
    02-17-16, 03:04 AM Go to last post
  20. ht 4100 questions

    Started by perko0‎, 01-08-16 05:51 PM
    • Replies: 7
    • Views: 513
    02-13-16, 02:56 AM Go to last post

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