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: 57,290
    09-20-04, 02:50 AM Go to last post
  1. 4.9 mystery issue....

    Started by abrasumente‎, 11-16-16 10:04 PM
    • Replies: 2
    • Views: 154
    01-16-17, 11:29 AM Go to last post
  2. Injectors solved the miss BUT fuel rail leaks bad

    Started by rafe‎, 01-13-17 08:52 PM
    • Replies: 1
    • Views: 66
    01-15-17, 03:21 PM Go to last post
  3. 4100 sleeve selection (rehash?)

    Started by Leeb‎, 06-15-05 08:01 AM
    4 Pages
    1 2 3 4
    • Replies: 48
    • Views: 4,267
    01-12-17, 09:23 AM Go to last post
  4. Looking For More Power From My 4.1

    Started by CaddyFromNowOn‎, 02-05-06 02:13 PM
    • Replies: 14
    • Views: 1,011
    01-12-17, 09:14 AM Go to last post
  5. Coolant pellets/conditoner

    Started by MARK2995‎, 10-06-05 09:09 PM
    • Replies: 4
    • Views: 640
    01-12-17, 09:09 AM Go to last post
  6. HT4100 4.1, need help finding this part!

    Started by spitfire980‎, 10-30-16 02:43 AM
    • Replies: 4
    • Views: 208
    01-09-17, 12:51 AM Go to last post
  7. HT 4100 Engine is it that bad

    Started by thewill02‎, 04-23-04 01:07 PM
    3 Pages
    1 2 3
    • Replies: 36
    • Views: 5,681
    12-18-16, 02:37 PM Go to last post
  8. My 1986 Coupe De Ville 4.1L startup

    Started by tallpat‎, 12-18-16 07:20 AM
    • Replies: 0
    • Views: 71
    12-18-16, 07:20 AM Go to last post
  9. Where is the MAP sensor located ???? 84 Seville

    Started by HoganRadial‎, 11-26-05 04:33 PM
    • Replies: 3
    • Views: 2,050
    12-10-16, 04:26 PM Go to last post
  10. Diesel Oil For 4.9?

    Started by WastedBugsBunny‎, 11-29-16 02:36 PM
    • Replies: 8
    • Views: 156
    12-01-16, 09:05 PM Go to last post
  11. Looking for a Great Mechanic in Los Angeles, CA.

    Started by CornerMan‎, 11-04-16 04:00 PM
    • Replies: 1
    • Views: 88
    11-04-16, 07:19 PM Go to last post
  12. Need Help in OKLAHOMA CITY

    Started by MSully‎, 10-27-16 07:02 PM
    • Replies: 1
    • Views: 149
    10-30-16, 11:25 AM Go to last post
  13. Your experience with the HT 4100?

    Started by 85SevilleFan‎, 07-28-16 04:09 PM
    • Replies: 8
    • Views: 461
    10-26-16, 05:33 PM Go to last post
  14. Engine coolant level sensor

    Started by T.Elsten‎, 09-27-16 04:42 AM
    • Replies: 0
    • Views: 162
    09-27-16, 04:42 AM Go to last post
  15. Stripped4.9 headbolt

    Started by cutlass72‎, 05-15-09 02:41 PM
    • Replies: 5
    • Views: 646
    09-14-16, 06:36 PM Go to last post
  16. Need trouble codes for '83 HT-4100 Eldo

    Started by baldizzone‎, 06-22-04 12:00 PM
    • Replies: 6
    • Views: 4,752
    08-23-16, 04:13 AM Go to last post
  17. E91 Code

    Started by waltgaffney‎, 08-22-16 01:14 PM
    • Replies: 0
    • Views: 146
    08-22-16, 01:14 PM Go to last post
  18. Unhappy Eldorado 4.1 motor problem

    Started by Pete Newman‎, 02-06-05 12:07 PM
    • Replies: 7
    • Views: 988
    08-17-16, 12:47 PM Go to last post
  19. Performance engine for Deville 1984

    Started by Glibcon‎, 07-07-16 06:13 PM
    • Replies: 1
    • Views: 307
    07-07-16, 06:40 PM Go to last post
  20. Coupe DeVille 4.1 1984 Error codes 32,34,36,52

    Started by SamDeVi‎, 06-15-16 02:36 PM
    • Replies: 1
    • Views: 261
    07-06-16, 11:19 PM Go to last post
  21. 4.9 injector replacement questions

    Started by CaddilacJohn‎, 05-26-16 11:05 PM
    • Replies: 2
    • Views: 367
    06-02-16, 06:15 PM Go to last post
    • Replies: 4
    • Views: 434
    05-28-16, 11:36 AM Go to last post
  22. 4.9 High NOx, Failed Smog, stumped and need help!

    Started by CADDCT‎, 04-03-16 09:56 PM
    • Replies: 7
    • Views: 618
    05-23-16, 06:09 AM Go to last post
  23. Minimum Air Settings for 82 Cad 4.1 V8 HT4100

    Started by hotrodjohn71‎, 04-19-16 02:11 PM
    • Replies: 2
    • Views: 315
    05-19-16, 11:32 AM Go to last post
  24. HT 4100 oil pan capacity question

    Started by Duane Hayes‎, 01-11-13 10:21 PM
    • Replies: 8
    • Views: 2,772
    05-14-16, 06:08 PM Go to last post

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