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: 59,332
    09-20-04, 01:50 AM Go to last post
  1. coolant temp to cold?

    Started by jesper, 06-01-17 08:04 PM
    • Replies: 1
    • Views: 64
    06-11-17, 09:18 PM Go to last post
  2. 4100 Runs either perfect or horrible...

    Started by 84Biarritz, 06-07-17 01:28 PM
    • Replies: 4
    • Views: 112
    06-11-17, 09:16 PM Go to last post
  3. HT 4100 Engine is it that bad

    Started by thewill02, 04-23-04 12:07 PM
    4 Pages
    1 2 3 4
    • Replies: 48
    • Views: 7,837
    05-24-17, 02:55 PM Go to last post
  4. 4.9 mystery issue....

    Started by abrasumente, 11-16-16 09:04 PM
    • Replies: 5
    • Views: 393
    05-20-17, 10:46 AM Go to last post
  5. 4100 service now light

    Started by baldizzone, 10-03-03 01:36 PM
    • Replies: 14
    • Views: 5,635
    05-18-17, 02:43 PM Go to last post
  6. Need Help in OKLAHOMA CITY

    Started by MSully, 10-27-16 06:02 PM
    • Replies: 2
    • Views: 253
    05-16-17, 02:42 AM Go to last post
    • Replies: 6
    • Views: 239
    04-04-17, 09:50 PM Go to last post
  7. Replacing Northstar 4.6 with a 4.9 engine

    Started by cmasury, 03-06-17 08:57 PM
    • Replies: 0
    • Views: 134
    03-06-17, 08:57 PM Go to last post
    • Replies: 5
    • Views: 228
    02-03-17, 04:37 PM Go to last post
  8. Injectors solved the miss BUT fuel rail leaks bad

    Started by rafe, 01-13-17 07:52 PM
    • Replies: 1
    • Views: 180
    01-15-17, 02:21 PM Go to last post
  9. 4100 sleeve selection (rehash?)

    Started by Leeb, 06-15-05 07:01 AM
    4 Pages
    1 2 3 4
    • Replies: 48
    • Views: 4,805
    01-12-17, 08:23 AM Go to last post
  10. Looking For More Power From My 4.1

    Started by CaddyFromNowOn, 02-05-06 01:13 PM
    • Replies: 14
    • Views: 1,189
    01-12-17, 08:14 AM Go to last post
  11. Coolant pellets/conditoner

    Started by MARK2995, 10-06-05 08:09 PM
    • Replies: 4
    • Views: 770
    01-12-17, 08:09 AM Go to last post
  12. HT4100 4.1, need help finding this part!

    Started by spitfire980, 10-30-16 01:43 AM
    • Replies: 4
    • Views: 356
    01-08-17, 11:51 PM Go to last post
  13. My 1986 Coupe De Ville 4.1L startup

    Started by tallpat, 12-18-16 06:20 AM
    • Replies: 0
    • Views: 159
    12-18-16, 06:20 AM Go to last post
    • Replies: 3
    • Views: 2,314
    12-10-16, 03:26 PM Go to last post
  14. Diesel Oil For 4.9?

    Started by WastedBugsBunny, 11-29-16 01:36 PM
    • Replies: 8
    • Views: 307
    12-01-16, 08:05 PM Go to last post
    • Replies: 1
    • Views: 154
    11-04-16, 06:19 PM Go to last post
  15. Your experience with the HT 4100?

    Started by 85SevilleFan, 07-28-16 03:09 PM
    • Replies: 8
    • Views: 594
    10-26-16, 04:33 PM Go to last post
  16. Engine coolant level sensor

    Started by T.Elsten, 09-27-16 03:42 AM
    • Replies: 0
    • Views: 238
    09-27-16, 03:42 AM Go to last post
  17. Stripped4.9 headbolt

    Started by cutlass72, 05-15-09 01:41 PM
    • Replies: 5
    • Views: 742
    09-14-16, 05:36 PM Go to last post
  18. Need trouble codes for '83 HT-4100 Eldo

    Started by baldizzone, 06-22-04 11:00 AM
    • Replies: 6
    • Views: 5,103
    08-23-16, 03:13 AM Go to last post
  19. E91 Code

    Started by waltgaffney, 08-22-16 12:14 PM
    • Replies: 0
    • Views: 220
    08-22-16, 12:14 PM Go to last post
  20. Unhappy Eldorado 4.1 motor problem

    Started by Pete Newman, 02-06-05 11:07 AM
    • Replies: 7
    • Views: 1,097
    08-17-16, 11:47 AM Go to last post
  21. Performance engine for Deville 1984

    Started by Glibcon, 07-07-16 05:13 PM
    • Replies: 1
    • Views: 379
    07-07-16, 05:40 PM Go to last post

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