HT4100 4.1, 4.5, 4.9 - Page 4
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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: 52,003
    09-20-04, 02:50 AM Go to last post
  1. EGR Valve. 'P' or 'N' type ?

    Started by Mr.BayArea‎, 11-13-14 01:51 PM
    • Replies: 4
    • Views: 539
    12-08-14, 09:04 AM Go to last post
  2. full tune - up / now running a bit wierd 85 eldo

    Started by domer94‎, 12-05-14 06:56 PM
    • Replies: 10
    • Views: 486
    12-07-14, 06:15 PM Go to last post
  3. Oil pan gasket: Is it worth it?

    Started by Sevillian273‎, 12-01-08 03:28 AM
    • Replies: 10
    • Views: 8,600
    12-06-14, 11:28 PM Go to last post
  4. accel supercoil on 85 4.1

    Started by domer94‎, 12-03-14 11:23 AM
    • Replies: 9
    • Views: 476
    12-05-14, 11:41 PM Go to last post
  5. EGR SOLENOID 85 Seville

    Started by omston‎, 11-22-14 05:43 PM
    • Replies: 14
    • Views: 891
    12-05-14, 07:19 PM Go to last post
  6. quick question 85 4.1

    Started by domer94‎, 11-24-14 10:50 PM
    • Replies: 5
    • Views: 517
    12-05-14, 02:41 PM Go to last post
    • Replies: 2
    • Views: 416
    11-20-14, 08:35 PM Go to last post
  7. 85 eldo upcoming purchase questions

    Started by domer94‎, 11-12-14 03:54 PM
    • Replies: 2
    • Views: 429
    11-17-14, 09:39 PM Go to last post
  8. 82 Seville not idiling or running correctly

    Started by DPD‎, 09-23-14 08:52 PM
    3 Pages
    1 2 3
    • Replies: 43
    • Views: 1,812
    11-12-14, 06:55 PM Go to last post
    • Replies: 1
    • Views: 620
    11-12-14, 09:11 AM Go to last post
  9. 4.9 engine oil pump needed

    Started by shaagger‎, 11-12-14 01:31 AM
    • Replies: 0
    • Views: 330
    11-12-14, 01:31 AM Go to last post
  10. Timing advance car nut

    Started by omston‎, 11-08-14 11:02 PM
    • Replies: 4
    • Views: 414
    11-10-14, 10:15 AM Go to last post
  11. Mid 80's edorado... Do or dont???

    Started by domer94‎, 10-22-14 09:50 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 1,066
    11-09-14, 07:24 PM Go to last post
  12. Got a Reply! on HT4100 TO 4500 Conversion!

    Started by ForrestAMDXP‎, 02-23-05 04:54 PM
    • Replies: 2
    • Views: 1,439
    11-04-14, 01:15 AM Go to last post
  13. Question 4.1 Oscillating/Hunting idle , any suggestions besides...

    Started by notease‎, 10-12-14 12:22 PM
    2 Pages
    1 2
    • Replies: 15
    • Views: 943
    10-28-14, 05:02 AM Go to last post
  14. Timing marks for 4.1 1984 engine

    Started by jimbab5‎, 10-14-14 09:09 PM
    • Replies: 5
    • Views: 477
    10-16-14, 11:32 AM Go to last post
  15. What year and model is this engine from?

    Started by desotodude‎, 10-03-14 06:38 PM
    • Replies: 4
    • Views: 425
    10-12-14, 11:59 PM Go to last post
  16. Ht4100 Supplement Pellets nowadays ?

    Started by notease‎, 10-09-14 11:21 AM
    • Replies: 5
    • Views: 756
    10-11-14, 05:55 PM Go to last post
  17. 85 Eldorado 4.1

    Started by maxx123‎, 10-09-14 08:40 AM
    • Replies: 4
    • Views: 541
    10-11-14, 09:41 AM Go to last post
  18. First time Cadillac owner - bad 4.1 engine

    Started by 4100engineswap‎, 04-29-14 09:47 AM
    • Replies: 4
    • Views: 1,137
    10-07-14, 06:24 PM Go to last post
    • Replies: 0
    • Views: 433
    10-04-14, 03:18 PM Go to last post
  19. 1990 DeVille, 4.5l engine issues

    Started by caddynewby‎, 05-09-13 03:19 PM
    • Replies: 2
    • Views: 1,065
    09-28-14, 11:34 AM Go to last post
    • Replies: 6
    • Views: 509
    09-26-14, 05:38 PM Go to last post
  20. 1995 Deville - FPR replacement tips ?

    Started by rayjuswa‎, 09-19-14 10:01 PM
    • Replies: 5
    • Views: 485
    09-23-14, 04:22 PM Go to last post
    • Replies: 9
    • Views: 827
    09-22-14, 12:17 PM Go to last post

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