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 02:50 AM
    • Replies: 0
    • Views: 56,794
    09-20-04, 02:50 AM Go to last post
  1. Diesel Oil For 4.9?

    Started by WastedBugsBunny‎, 11-29-16 02:36 PM
    • Replies: 8
    • Views: 115
    12-01-16, 09:05 PM Go to last post
  2. 4.9 mystery issue....

    Started by abrasumente‎, 11-16-16 10:04 PM
    • Replies: 1
    • Views: 123
    11-16-16, 10:09 PM Go to last post
  3. Looking for a Great Mechanic in Los Angeles, CA.

    Started by CornerMan‎, 11-04-16 04:00 PM
    • Replies: 1
    • Views: 67
    11-04-16, 07:19 PM Go to last post
  4. HT4100 4.1, need help finding this part!

    Started by spitfire980‎, 10-30-16 02:43 AM
    • Replies: 3
    • Views: 146
    11-01-16, 05:50 PM Go to last post
  5. Need Help in OKLAHOMA CITY

    Started by MSully‎, 10-27-16 07:02 PM
    • Replies: 1
    • Views: 132
    10-30-16, 11:25 AM Go to last post
  6. Your experience with the HT 4100?

    Started by 85SevilleFan‎, 07-28-16 04:09 PM
    • Replies: 8
    • Views: 415
    10-26-16, 05:33 PM Go to last post
  7. Engine coolant level sensor

    Started by T.Elsten‎, 09-27-16 04:42 AM
    • Replies: 0
    • Views: 142
    09-27-16, 04:42 AM Go to last post
  8. Stripped4.9 headbolt

    Started by cutlass72‎, 05-15-09 02:41 PM
    • Replies: 5
    • Views: 614
    09-14-16, 06:36 PM Go to last post
  9. Need trouble codes for '83 HT-4100 Eldo

    Started by baldizzone‎, 06-22-04 12:00 PM
    • Replies: 6
    • Views: 4,642
    08-23-16, 04:13 AM Go to last post
  10. E91 Code

    Started by waltgaffney‎, 08-22-16 01:14 PM
    • Replies: 0
    • Views: 124
    08-22-16, 01:14 PM Go to last post
  11. Unhappy Eldorado 4.1 motor problem

    Started by Pete Newman‎, 02-06-05 12:07 PM
    • Replies: 7
    • Views: 955
    08-17-16, 12:47 PM Go to last post
  12. Performance engine for Deville 1984

    Started by Glibcon‎, 07-07-16 06:13 PM
    • Replies: 1
    • Views: 279
    07-07-16, 06:40 PM Go to last post
  13. Coupe DeVille 4.1 1984 Error codes 32,34,36,52

    Started by SamDeVi‎, 06-15-16 02:36 PM
    • Replies: 1
    • Views: 208
    07-06-16, 11:19 PM Go to last post
  14. 4.9 injector replacement questions

    Started by CaddilacJohn‎, 05-26-16 11:05 PM
    • Replies: 2
    • Views: 326
    06-02-16, 06:15 PM Go to last post
    • Replies: 4
    • Views: 393
    05-28-16, 11:36 AM Go to last post
  15. 4.9 High NOx, Failed Smog, stumped and need help!

    Started by CADDCT‎, 04-03-16 09:56 PM
    • Replies: 7
    • Views: 567
    05-23-16, 06:09 AM Go to last post
  16. Minimum Air Settings for 82 Cad 4.1 V8 HT4100

    Started by hotrodjohn71‎, 04-19-16 02:11 PM
    • Replies: 2
    • Views: 293
    05-19-16, 11:32 AM Go to last post
  17. HT 4100 oil pan capacity question

    Started by Duane Hayes‎, 01-11-13 10:21 PM
    • Replies: 8
    • Views: 2,709
    05-14-16, 06:08 PM Go to last post
  18. Surging Idle on 82 Cad Fleetwood

    Started by hotrodjohn71‎, 04-07-16 08:18 PM
    • Replies: 8
    • Views: 314
    04-10-16, 11:21 AM Go to last post
    • Replies: 1
    • Views: 184
    04-03-16, 05:56 AM Go to last post
    • Replies: 1
    • Views: 202
    04-01-16, 12:10 AM Go to last post
  19. 82 Coupe DeVille 4.1 Belt Replacement

    Started by 82_CoupeDeville‎, 03-31-16 11:49 PM
    • Replies: 0
    • Views: 191
    03-31-16, 11:49 PM Go to last post
  20. HT4100 A/C bypass diagram

    Started by Datboisheed803‎, 02-13-16 12:14 AM
    • Replies: 2
    • Views: 347
    03-30-16, 04:33 PM Go to last post
  21. How do you convert 80's model to R134

    Started by 87allante4.9swap‎, 09-02-09 05:46 PM
    • Replies: 10
    • Views: 1,420
    03-29-16, 04:50 PM Go to last post
  22. Boosting HT4100 Performance

    Started by DrDave‎, 02-21-05 05:50 AM
    2 Pages
    1 2
    • Replies: 27
    • Views: 13,268
    03-29-16, 04:48 PM Go to last post

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