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: 58,519
    09-20-04, 01:50 AM Go to last post
  1. HT 4100 Engine is it that bad

    Started by thewill02, 04-23-04 12:07 PM
    3 Pages
    1 2 3
    • Replies: 43
    • Views: 6,996
    04-18-17, 06:22 PM Go to last post
    • Replies: 6
    • Views: 183
    04-04-17, 09:50 PM Go to last post
  2. Replacing Northstar 4.6 with a 4.9 engine

    Started by cmasury, 03-06-17 08:57 PM
    • Replies: 0
    • Views: 98
    03-06-17, 08:57 PM Go to last post
    • Replies: 5
    • Views: 184
    02-03-17, 04:37 PM Go to last post
  3. 4.9 mystery issue....

    Started by abrasumente, 11-16-16 09:04 PM
    • Replies: 3
    • Views: 301
    01-25-17, 01:22 AM Go to last post
  4. Injectors solved the miss BUT fuel rail leaks bad

    Started by rafe, 01-13-17 07:52 PM
    • Replies: 1
    • Views: 146
    01-15-17, 02:21 PM Go to last post
  5. 4100 sleeve selection (rehash?)

    Started by Leeb, 06-15-05 07:01 AM
    4 Pages
    1 2 3 4
    • Replies: 48
    • Views: 4,671
    01-12-17, 08:23 AM Go to last post
  6. Looking For More Power From My 4.1

    Started by CaddyFromNowOn, 02-05-06 01:13 PM
    • Replies: 14
    • Views: 1,133
    01-12-17, 08:14 AM Go to last post
  7. Coolant pellets/conditoner

    Started by MARK2995, 10-06-05 08:09 PM
    • Replies: 4
    • Views: 738
    01-12-17, 08:09 AM Go to last post
  8. HT4100 4.1, need help finding this part!

    Started by spitfire980, 10-30-16 01:43 AM
    • Replies: 4
    • Views: 302
    01-08-17, 11:51 PM Go to last post
  9. My 1986 Coupe De Ville 4.1L startup

    Started by tallpat, 12-18-16 06:20 AM
    • Replies: 0
    • Views: 128
    12-18-16, 06:20 AM Go to last post
    • Replies: 3
    • Views: 2,223
    12-10-16, 03:26 PM Go to last post
  10. Diesel Oil For 4.9?

    Started by WastedBugsBunny, 11-29-16 01:36 PM
    • Replies: 8
    • Views: 259
    12-01-16, 08:05 PM Go to last post
    • Replies: 1
    • Views: 133
    11-04-16, 06:19 PM Go to last post
  11. Need Help in OKLAHOMA CITY

    Started by MSully, 10-27-16 06:02 PM
    • Replies: 1
    • Views: 198
    10-30-16, 10:25 AM Go to last post
  12. Your experience with the HT 4100?

    Started by 85SevilleFan, 07-28-16 03:09 PM
    • Replies: 8
    • Views: 552
    10-26-16, 04:33 PM Go to last post
  13. Engine coolant level sensor

    Started by T.Elsten, 09-27-16 03:42 AM
    • Replies: 0
    • Views: 207
    09-27-16, 03:42 AM Go to last post
  14. Stripped4.9 headbolt

    Started by cutlass72, 05-15-09 01:41 PM
    • Replies: 5
    • Views: 710
    09-14-16, 05:36 PM Go to last post
  15. Need trouble codes for '83 HT-4100 Eldo

    Started by baldizzone, 06-22-04 11:00 AM
    • Replies: 6
    • Views: 4,964
    08-23-16, 03:13 AM Go to last post
  16. E91 Code

    Started by waltgaffney, 08-22-16 12:14 PM
    • Replies: 0
    • Views: 182
    08-22-16, 12:14 PM Go to last post
  17. Unhappy Eldorado 4.1 motor problem

    Started by Pete Newman, 02-06-05 11:07 AM
    • Replies: 7
    • Views: 1,059
    08-17-16, 11:47 AM Go to last post
  18. Performance engine for Deville 1984

    Started by Glibcon, 07-07-16 05:13 PM
    • Replies: 1
    • Views: 358
    07-07-16, 05:40 PM Go to last post
  19. Coupe DeVille 4.1 1984 Error codes 32,34,36,52

    Started by SamDeVi, 06-15-16 01:36 PM
    • Replies: 1
    • Views: 328
    07-06-16, 10:19 PM Go to last post
  20. 4.9 injector replacement questions

    Started by CaddilacJohn, 05-26-16 10:05 PM
    • Replies: 2
    • Views: 462
    06-02-16, 05:15 PM Go to last post
    • Replies: 4
    • Views: 504
    05-28-16, 10:36 AM Go to last post

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