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: 52,072
    09-20-04, 02:50 AM Go to last post
  1. 93 deville cooler lines

    Started by still_walkin‎, 02-08-16 06:01 PM
    • Replies: 2
    • Views: 79
    02-09-16, 10:41 PM Go to last post
  2. 1984 eldorado cadillac, 4.1 .

    Started by Banjodan‎, 02-05-16 11:17 AM
    • Replies: 1
    • Views: 122
    02-07-16, 08:24 AM Go to last post
  3. 4100 service now light

    Started by baldizzone‎, 10-03-03 02:36 PM
    • Replies: 11
    • Views: 4,201
    02-04-16, 07:14 PM Go to last post
  4. 4.9L '93 Seville: How do I replace the pickup coil?

    Started by SubieHo‎, 05-30-08 03:51 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 7,712
    02-02-16, 02:45 PM Go to last post
  5. ht 4100 questions

    Started by perko0‎, 01-08-16 06:51 PM
    • Replies: 6
    • Views: 318
    01-30-16, 02:14 PM Go to last post
  6. Oil Filter Adapter/ Distributor Removal

    Started by Crackillac‎, 01-30-16 01:14 AM
    • Replies: 1
    • Views: 133
    01-30-16, 08:57 AM Go to last post
  7. 1986 Hearse 24 hours of LeMons Race car !

    Started by DawgStrip‎, 01-11-16 03:39 PM
    • Replies: 6
    • Views: 243
    01-30-16, 01:34 AM Go to last post
  8. 4100 distributor thrust washer

    Started by black396‎, 01-29-16 09:55 AM
    • Replies: 0
    • Views: 153
    01-29-16, 09:55 AM Go to last post
  9. 4.9L Fuel Economy

    Started by Big_Cadillacs‎, 12-10-05 11:59 PM
    2 Pages
    1 2
    • Replies: 27
    • Views: 6,542
    01-18-16, 04:41 PM Go to last post
  10. Coolant supplement Tabs

    Started by mntess5‎, 12-06-15 07:33 PM
    • Replies: 7
    • Views: 380
    01-01-16, 08:42 PM Go to last post
  11. 92 eldorado 4.9L

    Started by Jwalker14‎, 12-10-15 03:02 AM
    • Replies: 0
    • Views: 222
    12-10-15, 03:02 AM Go to last post
  12. oil leak in filter area - 85 eldo 4.1

    Started by domer94‎, 07-08-15 01:00 PM
    • Replies: 8
    • Views: 396
    12-09-15, 04:01 PM Go to last post
  13. Boosting HT4100 Performance

    Started by DrDave‎, 02-21-05 05:50 AM
    2 Pages
    1 2
    • Replies: 26
    • Views: 10,997
    12-05-15, 04:15 PM Go to last post
  14. New ISC Motor Issue

    Started by MSully‎, 11-18-15 04:06 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 497
    11-28-15, 01:00 PM Go to last post
  15. How do you convert 80's model to R134

    Started by 87allante4.9swap‎, 09-02-09 05:46 PM
    • Replies: 9
    • Views: 1,151
    11-18-15, 09:16 PM Go to last post
  16. In search of a new/rebuilt vacuum pump...

    Started by Tshimanga75‎, 05-08-06 02:26 PM
    3 Pages
    1 2 3
    • Replies: 37
    • Views: 5,997
    11-18-15, 01:05 AM Go to last post
  17. Mysterious missing issue

    Started by MSully‎, 08-14-15 11:39 AM
    • Replies: 8
    • Views: 374
    11-11-15, 04:17 PM Go to last post
  18. 11 !/2 miles per gallon ?

    Started by waltgaffney‎, 10-18-15 10:58 PM
    • Replies: 13
    • Views: 417
    11-10-15, 06:58 AM Go to last post
  19. mileage on your 4.9

    Started by still_walkin‎, 10-30-15 05:57 AM
    • Replies: 10
    • Views: 346
    11-09-15, 07:10 PM Go to last post
  20. valve tap after changing oil - 85 eldo 4.1

    Started by domer94‎, 06-25-15 11:23 PM
    • Replies: 10
    • Views: 454
    11-08-15, 08:21 PM Go to last post
  21. The best engine to put in my Eldo Cadillac?

    Started by KINGUYOM‎, 08-28-11 06:58 PM
    2 Pages
    1 2
    • Replies: 25
    • Views: 10,384
    11-08-15, 07:46 PM Go to last post
  22. 93 Eldorado starter wiring

    Started by GothicThug420‎, 11-03-15 02:38 PM
    • Replies: 9
    • Views: 177
    11-04-15, 08:25 PM Go to last post
  23. 1992 4dr Deville

    Started by Dave S Texas‎, 11-03-15 02:13 PM
    • Replies: 3
    • Views: 188
    11-03-15, 07:50 PM Go to last post
  24. 1985 Seville 4.1L Head Bolts

    Started by samlembo1955‎, 10-17-15 03:18 PM
    • Replies: 2
    • Views: 251
    10-19-15, 04:06 PM Go to last post
  25. 4.5 main bearings

    Started by raymondk‎, 09-27-15 01:49 AM
    • Replies: 2
    • Views: 257
    10-13-15, 12:07 AM Go to last post

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