: Northstar Engines and System Technical Discussion



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  1. My story: HG headgasket failure
  2. LH2 Swap - Issue starting
  3. Oil/coolant mixing
  4. Throttle Position Sensor relearn ??
  5. 2000 & up Seville air intake resonator
  6. 2000 Deville Fuel Pressure Specs
  7. 2002 Deville rough idle
  8. 99 eldorado 02 sensors
  9. Oil Pressure Sending Unit - SRX
  10. P0308 #8 Misfire issue... Replaced a lot, still have issue
  11. 99 STS hard cold start. No codes, fpr tests ok and fuel is 44 psi running
  12. A method to remove Crankshaft bolt without locking the flywheel or using the starter.
  13. 2002 Deville AIR pump Vacuum line Routing
  14. 1999 Deville Headgasket - head job or total overhaul ?
  15. 2001 deville engine making kocking noise
  16. 2002 Deville Overheating after Thermostat replacement
  17. Water pump drive pulley
  18. Special tool for Northstar water pump drive pulley
  19. Reliability of 2005 and beyond Northstar-powered cars
  20. Harmonic Balancer Torque
  21. Need advice on who to do a Northstar head job in the Huntsville Alabama area
  22. NGK Spark plugs & coolant level message - 2003 Deville
  23. Get a Free set of Main Studs with Purchase of Sure Grip Cylinder Head Stud Kit
  24. Developed an engine whine... what is it?
  25. Please help with PCM issue on 1993 Allante
  26. limp mode..now misfire
  27. Water cooled alternator - what years/models ?
  28. O2 Sensors in a Hot Rod Set-up
  29. 2002 Northstar WOT, performance brakes, CORSA ?
  30. 1996 and later Northstar performance chips
  31. Magnaflows on a 2003 Deville
  32. socket down camshaft drive chain slot
  33. coolant drip middle front lower
  34. 2005 STS Camshaft Sensor Location? V8 4.6 engine
  35. Pcm issue or camshaft issue any help
  36. Rail / Injector Leak Deville 99
  37. Northstar chips, cold air intakes, and spark plugs
  38. coil on plug ignition modules
  39. Mystery Check Engine Light
  40. Only starts with starting fluid-Help
  41. 99 STS head gasket repair [ in car]
  42. Problem with 97 Eldorado. P 0300...
  43. 02 Cooling building back pressure. Purge line clear.
  44. 1998 STS coolant change
  45. Mystery Black Wire
  46. Oil pressure
  47. 98 deville, uses oil? but how
  48. What year is my Northstar motor, and what cars will it drop into?
  49. trouble with spark from coil packs
  50. Replace and Reprogram PCM 2001 DTS
  51. 1995 SLS - Poor idle quality
  52. Oil Pan Gasket and Permatex UltraGray placement
  53. 98 Deville, changing the coolant, sealant tabs?
  54. 2000 Deville Water Pump will Not Come Out
  55. Fuel pressure regulator
  56. 2003 Deville - exhaust steaming and coolant loss
  57. Can't remove Water Pump Drive pulley.. ever seen one that is stuck?
  58. Best Rear Main Seal Fix?
  59. Critique my coolant flush method
  60. Oil pressure light - 1998 Deville Northstar
  61. 1994 Eldorado thermostat replacement and coolant leak
  62. EGR Tubing
  63. '02 Seville was running fine, now it's not ?
  64. flex tube exhaust
  65. 01 Northstar Water in oil, high oil use, misses when cold.
  66. Coolant Leak Source? (pictures)
  67. When to reseal case halves?
  68. Look what I found in my engine!
  69. Puzzling Clattering Noise During Warm Startups
  70. HG's vs Pulled Threads
  71. Cat problems?
  72. Oil leaks on 1998 ElDorado
  73. 2000+ Intake Manifold on 1998 Northstar
  74. 2001 Deville - coolant boiling in reservoir
  75. Problem with my 1994 Eldorado engine - smoking
  76. code P 0171, P 0174 - solved
  77. Unable to communicate with the console cluster
  78. North Star Engine Disappointment (copy)
  79. SJ - API oil
  80. 97 ETC exhaust manifold fasterners.
  81. Fix the engine, (HG), replace the engine?
  82. Where does this go...?
  83. PCV Valve Elbow?
  84. Pics of my oil leaks
  85. combustion leak tester
  86. Anyone used Lucas Engine Stop Leak?
  87. Water pump issue, mostly? 1994 STS
  88. 98 Deville Water Pump Fail After Serpentine Belt Replaced
  89. Water Pump - Failing When Hot
  90. Oil Pan Leak?
  91. 2002 Deville misfire on Northstar
  92. I'm gonna do a block test today
  93. Car keeps overheating
  94. Service fuel system
  95. radiator cap # ?
  96. Northstar Loan-A-Tool Program, USA shipping on stud kits
  97. EGR Major Issues..help!
  98. 2000 Deville surging?
  99. 1998 STS crankshaft position sensors location
  100. Deville engine swaps and differences
  101. Water pump won't break
  102. New business pratices and standards coming into effect Apr 15/2014
  103. AIR pump on '99
  104. 1995 STS - multiple crank cold starts
  105. Pre-diagnosing HG issues?
  106. eldo running hot
  107. Which alternator? 94 Deville Concours
  108. My 1994 Deville 4.9 is starting to show some signs.
  109. 1999 deville - replaced water pump - running hot
  110. 2009 Buick Lucerne Headgasket
  111. The American V8 - Anatomy of a Hydrolock
  112. 2005 Deville oil pan seal leak
  113. Vacuum diagram
  114. 1997 STS - Long crank/start times - (Advice / Ideas)
  115. Lower crankcase reseal - 2005 Deville
  116. My sincerest apologies and also thanks -
  117. headbolt inserts
  118. Northstar and carbon cleaning
  119. Running but ............... 2001 Northstar
  120. 2000 DTS - no power
  121. To buy or not to buy.....1998 ESC
  122. 1996 DeVille flex plate replacement
  123. engine oil in intake manifold
  124. 2004 DTS Frustrations... misfires and SES
  125. 2000 SLS powertrain/ cradle removal
  126. 98 deville coolant smell?
  127. 02 N☆ Fuel Pressure
  128. Air intake upgrade - DTS Performance ?
  129. 2007 Engine Knock 4.6 Help
  130. The Caddy lives again - Life after the dreaded head leakage
  131. 1997 Deville - EGR remove & replace
  132. Northstar head bolt hole thread repair options
  133. Northstar Production Numbers 1993-2009
  134. 2000 STS - P 0300 - rough idle
  135. 2003 Seville EGR codes
  136. 2004 DHS - CMP location ?
  137. Mechinical buzzing noise from under hood ( 2002 Deville, 150,000)
  138. Blue devil and Norhtstar:
  139. Stalling issue - slow speeds - 1998 ETC
  140. Damaged throttle cable (1998 Deville)
  141. 2000 DTS - correct replacement engine ?
  142. My experience with the water crossover job
  143. Northstar Swap Question
  144. Interesting Listing........ pre-2000 Northstar and transmission
  145. 2001 Deville oil distribution manifold plate seal leak
  146. 1998 Deville has leak at water crossover (150,000 miles)
  147. 2003 Head Gasket Repair
  148. 2006 Northstar engine problems - Buick Lucerne
  149. Water pump? 1999 STS overheating
  150. Northstar swap into a 1987 Fiero GT - engines and differences
  151. Oil Filter Pre-fill
  152. The InFamous N* Oil Leak - Oil Manifold
  153. Engine miss - 1998 Deville
  154. Priming Northstar after total rebuild
  155. Which Rear Main Seal installer do I need for a 1999 DeVille?
  156. Alt amps too high?
  157. 2003 STS engine seized
  158. Cylinder damage question....extended idling
  159. Anyone use "cadillacheadgasketfix.com" in bellflower, ca. to rebuild their Northstar?
  160. My 2000 Deville is back to life
  161. Melted camshaft water pump drive pulley
  162. 2001 Deville N* Spark plug boots questions
  163. drove over curb in fog 96 cadi died and wont restart
  164. fuel injector removal
  165. 2000 head gasket/ insert differences
  166. Northstar overheating-Repair
  167. Head porting Northstar...
  168. 01 Seville runs rough, 0306 code intermittent
  169. Attention all Northstar engine owners - Carroll Cadillac studs
  170. Questions about pre 00 Northstar oil change and use of additives
  171. Pressure in expansion tank
  172. ran out of gas now my SES light turned on any help
  173. New Northstar Crate Engines
  174. very bad coolant leak
  175. High Idle question
  176. Flowmasters on a 2003 SLS
  177. Simple spark plug question - Northstar "tune up"
  178. Results posted - Christmas Draw - FREE STUD KIT!
  179. 2004 Deville rough idle
  180. 1996 Deville fuel injectors
  181. Cylinder head bolt replacement
  182. Northstar R&D-Bench Test Apparatus
  183. Hello Cadillac/Northstar owners
  184. 1996 Deville...... 4.6 Northstar trouble......lotsa trouble.
  185. P0300 Misfire - My problem and solution + more problems...
  186. Best Engine Mounts - 1993-1994 or the newer?
  187. Blown head gasket repair
  188. occassional stalling problem
  189. 05 Deville
  190. Northstar battery life expectation
  191. 2001 DTS Valve Clearance question
  192. Fuel Pump Longevity/Milage Expectations
  193. Torquing N* head
  194. 96' Northstar cranks, will not start
  195. 01 Deville Cylinder #1 misfire
  196. bucking and kicking
  197. Northstar sitting for 12 years...need new springs?
  198. 2005 Bonneville GXP Northstar jumped time
  199. 2001 ETC Intermittent High Idle
  200. 2001 DTS won't accelerate past 2K rpms after spark plug change
  201. Advice on NorthStar coils - both ignition types
  202. Another Shout Out to Jake!!
  203. Code P 0171 showing - 1999 Deville
  204. 2001 DTS - interference engine 4.6l and timing chain replacement ?
  205. Studded heads update
  206. 1999 STS coolant questions
  207. 2000 STS NS smoking under hood after WOT
  208. Governor in NorthStar V8?
  209. O2 sensor-bank 1 S1
  210. No spark
  211. Please help! 94 SLS water pump cover...
  212. Wherer do these parts go ???
  213. Sudden Increase in Oil Consumption 2003 DHS
  214. Crankshaft pulley wobble
  215. 2001 Deville. Can't start after reinstalling engine
  216. Head gaskets and Time-Serts
  217. Oil pump?
  218. Help find part
  219. Maximum valve lift 04-05 Northstar 4.6
  220. 96' Northstar coolant leak
  221. cooling fan relays
  222. Help - 1993 Eldorado needs new engine
  223. Head Bolt Threads - Bonneville Northstar
  224. DOHC theory, any new information?
  225. Compression Ring Treatment
  226. 300 Northstar Headgasket repairs completed
  227. Where do these go?
  228. New motor to replace the northstar
  229. Northstar Replacement
  230. 2001 Deville hesitates while accelerating
  231. Retirement from the physical repairs to focus on the stud kits-
  232. The Dreaded Northstar Leaking Head Gasket- Fix, Sell or Junk?
  233. Why Leaking Headgaskets
  234. Is it dangerous - cracked flexplate on a Northstar
  235. 2008 STS engin dont swing
  236. fuel pump suddenly stops
  237. Stumble and stall
  238. Valve cover gaskets
  239. On the road again!
  240. 2001 Deville flat or domed pistons
  241. Changing the water pump "Belt?
  242. 1998 STS - Dies at speed and won't restart sometimes.
  243. Is it safe to buy a Northstar now? I can't stop driving Cadillacs!
  244. Northstar size question
  245. Need mechanic - 1994 STS Northstar near Winnipeg
  246. Northstar overheating
  247. Interchangeability of VIN: 9 and VIN: Y transmissions?
  248. Northstar Commander 950 base Map - sand rail install
  249. overheating need help
  250. Just a head gasket failure?