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: 48,070
    09-20-04, 01:50 AM Go to last post
  1. 91 4.9 Runs Rich and Gas Mileage Question

    Started by awadecki‎, 07-04-06 01:12 AM
    • Replies: 9
    • Views: 2,093
    07-26-15, 03:51 AM Go to last post
  2. swapping 440-T4

    Started by ehall‎, 04-21-15 12:39 PM
    • Replies: 14
    • Views: 423
    07-16-15, 12:02 AM Go to last post
  3. Code E053 question

    Started by Tatsr05‎, 07-12-15 10:44 PM
    • Replies: 2
    • Views: 109
    07-13-15, 02:49 PM Go to last post
  4. 4.1 Troubles on my 84 Deville

    Started by MaineWater‎, 07-12-15 10:46 PM
    • Replies: 1
    • Views: 112
    07-13-15, 12:07 PM Go to last post
  5. oil leak in filter area - 85 eldo 4.1

    Started by domer94‎, 07-08-15 12:00 PM
    • Replies: 4
    • Views: 143
    07-09-15, 10:09 PM Go to last post
  6. Fuel consumption and outside temp

    Started by caddynewby‎, 07-06-15 11:36 AM
    • Replies: 3
    • Views: 150
    07-09-15, 07:46 PM Go to last post
  7. valve tap after changing oil - 85 eldo 4.1

    Started by domer94‎, 06-25-15 10:23 PM
    • Replies: 8
    • Views: 237
    07-01-15, 11:31 AM Go to last post
  8. Changing lifters

    Started by iputon‎, 06-25-15 10:44 PM
    • Replies: 10
    • Views: 306
    06-27-15, 01:28 AM Go to last post
  9. Head Bolts

    Started by yattoka‎, 06-16-15 08:52 PM
    • Replies: 6
    • Views: 249
    06-20-15, 07:35 PM Go to last post
  10. Question Error code 29

    Started by tmgore‎, 12-29-05 04:13 PM
    • Replies: 2
    • Views: 724
    06-14-15, 10:03 AM Go to last post
  11. HT 4100 83' Deville Problems

    Started by LeviKendrick‎, 06-09-15 10:48 AM
    • Replies: 4
    • Views: 224
    06-10-15, 02:28 PM Go to last post
  12. 4.9 Distributor / Timing question

    Started by Cream_Devil_91‎, 06-24-10 01:00 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 8,422
    06-08-15, 01:17 AM Go to last post
  13. Looking to upgrade injectors ..91 4.9

    Started by zentrade‎, 06-07-15 12:20 PM
    • Replies: 0
    • Views: 167
    06-07-15, 12:20 PM Go to last post
  14. 1985 eldorado biarritz won't start

    Started by bernier7‎, 01-07-12 09:50 PM
    • Replies: 13
    • Views: 8,548
    06-03-15, 02:36 PM Go to last post
  15. Instructions on changing the coolant in an HT-4100?

    Started by Thizzmobile‎, 05-27-15 03:28 AM
    2 Pages
    1 2
    • Replies: 16
    • Views: 453
    05-31-15, 01:26 AM Go to last post
  16. 440-T4 > 4T6X-E conversion

    Started by ehall‎, 12-19-14 12:28 PM
    2 Pages
    1 2
    • Replies: 23
    • Views: 974
    05-20-15, 01:23 PM Go to last post
  17. Refresh HT4100 85 Seville

    Started by waterzap‎, 05-02-15 10:24 AM
    • Replies: 3
    • Views: 274
    05-02-15, 09:20 PM Go to last post
  18. 4.1 Coupe Freshining Up with pics

    Started by Crackillac‎, 04-19-15 11:44 PM
    • Replies: 9
    • Views: 413
    04-29-15, 10:51 PM Go to last post
  19. Coolant Pellets, Tabs.. are these them?

    Started by Crackillac‎, 04-17-15 01:35 AM
    • Replies: 5
    • Views: 336
    04-29-15, 10:13 AM Go to last post
  20. Noise after changing Oil 4.1 CDV

    Started by Crackillac‎, 04-21-15 11:13 PM
    • Replies: 11
    • Views: 349
    04-27-15, 11:23 PM Go to last post
  21. 4.9 cold start knock what is it??

    Started by shaagger‎, 03-23-15 12:48 AM
    • Replies: 7
    • Views: 401
    04-17-15, 03:03 AM Go to last post
    • Replies: 1
    • Views: 621
    04-16-15, 11:36 PM Go to last post
  22. Service Soon digital dash Out

    Started by Crackillac‎, 10-19-13 03:00 AM
    • Replies: 7
    • Views: 870
    04-15-15, 10:46 AM Go to last post
  23. 1985 Eldo transplant...

    Started by black396‎, 04-08-15 05:01 PM
    • Replies: 1
    • Views: 213
    04-09-15, 03:53 PM Go to last post
  24. School Me !

    Started by Rad_A_Lac‎, 04-03-15 12:20 PM
    • Replies: 7
    • Views: 329
    04-07-15, 08:56 AM Go to last post

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