: Northstar Engines and System Technical Discussion



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  1. flex tube exhaust
  2. 01 Northstar Water in oil, high oil use, misses when cold.
  3. Coolant Leak Source? (pictures)
  4. When to reseal case halves?
  5. Look what I found in my engine!
  6. Puzzling Clattering Noise During Warm Startups
  7. HG's vs Pulled Threads
  8. Cat problems?
  9. Oil leaks on 1998 ElDorado
  10. 2000+ Intake Manifold on 1998 Northstar
  11. 2001 Deville - coolant boiling in reservoir
  12. Problem with my 1994 Eldorado engine - smoking
  13. code P 0171, P 0174 - solved
  14. Unable to communicate with the console cluster
  15. North Star Engine Disappointment (copy)
  16. SJ - API oil
  17. 97 ETC exhaust manifold fasterners.
  18. Fix the engine, (HG), replace the engine?
  19. Where does this go...?
  20. PCV Valve Elbow?
  21. Pics of my oil leaks
  22. combustion leak tester
  23. Anyone used Lucas Engine Stop Leak?
  24. Water pump issue, mostly? 1994 STS
  25. 98 Deville Water Pump Fail After Serpentine Belt Replaced
  26. Water Pump - Failing When Hot
  27. Oil Pan Leak?
  28. 2002 Deville misfire on Northstar
  29. I'm gonna do a block test today
  30. Car keeps overheating
  31. Service fuel system
  32. radiator cap # ?
  33. Northstar Loan-A-Tool Program, USA shipping on stud kits
  34. EGR Major Issues..help!
  35. 2000 Deville surging?
  36. 1998 STS crankshaft position sensors location
  37. Deville engine swaps and differences
  38. Water pump won't break
  39. New business pratices and standards coming into effect Apr 15/2014
  40. AIR pump on '99
  41. 1995 STS - multiple crank cold starts
  42. Pre-diagnosing HG issues?
  43. eldo running hot
  44. Which alternator? 94 Deville Concours
  45. My 1994 Deville 4.9 is starting to show some signs.
  46. 1999 deville - replaced water pump - running hot
  47. 2009 Buick Lucerne Headgasket
  48. The American V8 - Anatomy of a Hydrolock
  49. 2005 Deville oil pan seal leak
  50. Vacuum diagram
  51. 1997 STS - Long crank/start times - (Advice / Ideas)
  52. Lower crankcase reseal - 2005 Deville
  53. My sincerest apologies and also thanks -
  54. headbolt inserts
  55. Northstar and carbon cleaning
  56. Running but ............... 2001 Northstar
  57. 2000 DTS - no power
  58. To buy or not to buy.....1998 ESC
  59. 1996 DeVille flex plate replacement
  60. engine oil in intake manifold
  61. 2004 DTS Frustrations... misfires and SES
  62. 2000 SLS powertrain/ cradle removal
  63. 98 deville coolant smell?
  64. 02 N☆ Fuel Pressure
  65. Air intake upgrade - DTS Performance ?
  66. 2007 Engine Knock 4.6 Help
  67. The Caddy lives again - Life after the dreaded head leakage
  68. 1997 Deville - EGR remove & replace
  69. Northstar head bolt hole thread repair options
  70. Northstar Production Numbers 1993-2009
  71. 2000 STS - P 0300 - rough idle
  72. 2003 Seville EGR codes
  73. 2004 DHS - CMP location ?
  74. Mechinical buzzing noise from under hood ( 2002 Deville, 150,000)
  75. Blue devil and Norhtstar:
  76. Stalling issue - slow speeds - 1998 ETC
  77. Damaged throttle cable (1998 Deville)
  78. 2000 DTS - correct replacement engine ?
  79. My experience with the water crossover job
  80. Northstar Swap Question
  81. Interesting Listing........ pre-2000 Northstar and transmission
  82. 2001 Deville oil distribution manifold plate seal leak
  83. 1998 Deville has leak at water crossover (150,000 miles)
  84. 2003 Head Gasket Repair
  85. 2006 Northstar engine problems - Buick Lucerne
  86. Water pump? 1999 STS overheating
  87. Northstar swap into a 1987 Fiero GT - engines and differences
  88. Oil Filter Pre-fill
  89. The InFamous N* Oil Leak - Oil Manifold
  90. Engine miss - 1998 Deville
  91. Priming Northstar after total rebuild
  92. Which Rear Main Seal installer do I need for a 1999 DeVille?
  93. Alt amps too high?
  94. 2003 STS engine seized
  95. Cylinder damage question....extended idling
  96. Anyone use "cadillacheadgasketfix.com" in bellflower, ca. to rebuild their Northstar?
  97. My 2000 Deville is back to life
  98. Melted camshaft water pump drive pulley
  99. 2001 Deville N* Spark plug boots questions
  100. drove over curb in fog 96 cadi died and wont restart
  101. fuel injector removal
  102. 2000 head gasket/ insert differences
  103. Northstar overheating-Repair
  104. Head porting Northstar...
  105. 01 Seville runs rough, 0306 code intermittent
  106. Attention all Northstar engine owners - Carroll Cadillac studs
  107. Questions about pre 00 Northstar oil change and use of additives
  108. Pressure in expansion tank
  109. ran out of gas now my SES light turned on any help
  110. New Northstar Crate Engines
  111. very bad coolant leak
  112. High Idle question
  113. Flowmasters on a 2003 SLS
  114. Simple spark plug question - Northstar "tune up"
  115. Results posted - Christmas Draw - FREE STUD KIT!
  116. 2004 Deville rough idle
  117. 1996 Deville fuel injectors
  118. Cylinder head bolt replacement
  119. Northstar R&D-Bench Test Apparatus
  120. Hello Cadillac/Northstar owners
  121. 1996 Deville...... 4.6 Northstar trouble......lotsa trouble.
  122. P0300 Misfire - My problem and solution + more problems...
  123. Best Engine Mounts - 1993-1994 or the newer?
  124. Blown head gasket repair
  125. occassional stalling problem
  126. 05 Deville
  127. Northstar battery life expectation
  128. 2001 DTS Valve Clearance question
  129. Fuel Pump Longevity/Milage Expectations
  130. Torquing N* head
  131. 96' Northstar cranks, will not start
  132. 01 Deville Cylinder #1 misfire
  133. bucking and kicking
  134. Northstar sitting for 12 years...need new springs?
  135. 2005 Bonneville GXP Northstar jumped time
  136. 2001 ETC Intermittent High Idle
  137. 2001 DTS won't accelerate past 2K rpms after spark plug change
  138. Advice on NorthStar coils - both ignition types
  139. Another Shout Out to Jake!!
  140. Code P 0171 showing - 1999 Deville
  141. 2001 DTS - interference engine 4.6l and timing chain replacement ?
  142. Studded heads update
  143. 1999 STS coolant questions
  144. 2000 STS NS smoking under hood after WOT
  145. Governor in NorthStar V8?
  146. O2 sensor-bank 1 S1
  147. No spark
  148. Please help! 94 SLS water pump cover...
  149. Wherer do these parts go ???
  150. Sudden Increase in Oil Consumption 2003 DHS
  151. Crankshaft pulley wobble
  152. 2001 Deville. Can't start after reinstalling engine
  153. Head gaskets and Time-Serts
  154. Oil pump?
  155. Help find part
  156. Maximum valve lift 04-05 Northstar 4.6
  157. 96' Northstar coolant leak
  158. cooling fan relays
  159. Help - 1993 Eldorado needs new engine
  160. Head Bolt Threads - Bonneville Northstar
  161. DOHC theory, any new information?
  162. Compression Ring Treatment
  163. Where do these go?
  164. New motor to replace the northstar
  165. Northstar Replacement
  166. 2001 Deville hesitates while accelerating
  167. Retirement from the physical repairs to focus on the stud kits-
  168. The Dreaded Northstar Leaking Head Gasket- Fix, Sell or Junk?
  169. Why Leaking Headgaskets
  170. Is it dangerous - cracked flexplate on a Northstar
  171. 2008 STS engin dont swing
  172. fuel pump suddenly stops
  173. Stumble and stall
  174. Valve cover gaskets
  175. On the road again!
  176. 2001 Deville flat or domed pistons
  177. Changing the water pump "Belt?
  178. 1998 STS - Dies at speed and won't restart sometimes.
  179. Is it safe to buy a Northstar now? I can't stop driving Cadillacs!
  180. Northstar size question
  181. Need mechanic - 1994 STS Northstar near Winnipeg
  182. Northstar overheating
  183. Interchangeability of VIN: 9 and VIN: Y transmissions?
  184. Northstar Commander 950 base Map - sand rail install
  185. overheating need help
  186. Just a head gasket failure?
  187. Northstar engine questions from Finland
  188. P 0171 and P 0174 code - 2004 Deville
  189. new generator-->ECM broken
  190. Disconnecting EGR
  191. water crossover
  192. mid case reseal tsb
  193. 4.6 N* Cylinder walls
  194. Replacing the alternator on 97 Deville Concours
  195. Ready to stud another northstar
  196. Heli-Coil removal?
  197. Northstar Performance
  198. Wanted to clean EGR but what have those engineers done now
  199. 99 N* rebuilt and burning lots of oil
  200. Northstar into Chevy Beretta swap
  201. 2001 Deville overheating... block test OK
  202. low oil pressure
  203. Pros & Cons Cadillac 4.6 vs Ford 4.6 (eg lincoln mark viii and others)
  204. Codes P0171, P0174 and P1258 come up on 1997 Deville
  205. Coil pack
  206. Eastern Massachusetts Cadillac shops?
  207. voltage question
  208. Bouncing Idles - 1995 SLS Northstar
  209. 2000 STS question
  210. Northstar maintenance requirements - 2005 Deville
  211. Brand New 1993-1994 Northstar Engine - Oil Leak Modified or Not
  212. Hard Starting Warm - if not Pedal to the Metal
  213. DHS 2000 won't start after changing CranKshaft and CaMshaft Position Sensors
  214. 1996 Deville over heats when ac is on
  215. HG question - 1997 Eldorado, 127000 miles
  216. need help
  217. Now what do I do? Northstar block casting porosity
  218. Coolant all over top of engine?
  219. 97 SLS Overheating - I've checked everything and need ideas
  220. 03 Deville hard idle and bogging out lower speeds
  221. 2003 Deville CKP codes
  222. P 0300 random misfire - 2000 STS
  223. Northstar Performance rebuilt engine
  224. exhaust buzzing noise 2006 dts
  225. Northstar head repair in Chicagoland area
  226. Guide pins
  227. Installing Rear Main Seal with Crank Removed
  228. Heater core follows head gasket ?
  229. 99 SLS overheating, need help
  230. Fixing Head Gasket
  231. Kent-Moore VS Time-sert
  232. Bought 1998 Deville 4 days ago - overheating
  233. Northstar: Did they ever get better?
  234. I need step by step procedure to replace a 2005 STS motor LH2 quickly
  235. HG test and green result
  236. Eliminating/raising the speed limiter - how to?
  237. Water pump removal socket-northstar
  238. Lurching idle
  239. 5.3 motor
  240. 95 Eldorado alternator plug wiring
  241. OVERHEATING (Long)
  242. 2000 Deville Motor Mount Heat Shield
  243. 95-99 Engine Beauty Cover - Intake bolts Not lining up
  244. 1998 STS Trouble Codes & Emission Test
  245. A positive HG repair experience
  246. 2000 DHS transmission light on
  247. Anyone that has pulled an N*? PLEASE! I need some advice.
  248. Blown Head Gasket Help
  249. Sell or Keep N*
  250. Best way to clean the engine bay?