: Northstar Engines and System Technical Discussion



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  1. Breaking in a N*
  2. Invisible leak (coolant)
  3. Another seafoam thread
  4. Is there an easy way to change coolant?
  5. what is considered normal coolant temperture for a north*?
  6. please identify mystery black box 01 DTS
  7. Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know
  8. Flushing Radiator
  9. Are there any worthwhile performance mods for the 98 north*?
  10. Was there more then one north* engine in 1998?
  11. Three (3) Codes on 1996 SLS: P1406, P0401, P0108
  12. Northstar Air Consumption.
  13. Eldo Gone....
  14. 4T80-E Transmission Fluid Change - DONE!
  15. P119 - Shorted Fuel Injector Problem
  16. How often do you WOT your north*?
  17. Before i go to beat the crap outta my car - WOT cleaning
  18. denso wires ???
  19. timeserts -so do these things prevent bad head gaskets
  20. Northstar 32 valve good for swap-out?
  21. '94 sts.. ignition coils, ignition control module?
  22. Car will not turn over....
  23. Has anyone ever got the P0741 code?
  24. Are there any good oil additives to add...
  25. I read a post about top tier gasoline....
  26. '95 Concours hard starting when it's cold outside
  27. my service engine soon light is on
  28. bad idea to use 87 octane?
  29. royal purple on a N*
  30. 03 n* and trans in a 99 SLS
  31. What gives the Northstar its "whirring" sound at idle?
  32. 96 sts starter problems, questions?
  33. How would i get a custom pcm?
  34. Beef up a 4.6L NStar?
  35. squeeky serpatine belt *new belt and tensioner*
  36. N* performance
  37. what year was it?
  38. opinions on high flow cats
  39. Gasoline Consumption question
  40. Looking for a Timesert Kit
  41. Engine Performance mods 95 STS
  42. Which oil i need for my 96 eldorado????
  43. How long should I let the N* warm up in the morning?
  44. Timesert Kits?
  45. 1997 SLS (overheating)
  46. Changing brakes on 96 SLS
  47. 2000 dts northstar reliabilty
  48. 2002 ETC Collector-mobile.
  49. What's the difference between the STS and SLS engines?
  50. Internal Mods For Northstar
  51. 99 to 00+ swap differences
  52. stuttering at idle
  53. 1999 Cadillac STS love/hate relationship...
  54. Free Northstar Engine
  55. Help the new guy make a good decision
  56. High Performance Head Gaskets?
  57. Parts ID
  58. Not run for 6 years, what would you do?
  59. 00 PCM on a 99 engine
  60. Blown Headgasket
  61. Aluminum Block porisity
  62. Its Alive
  63. oil life monitor problem
  64. P094 limp mode, no overdrive
  65. Valve Stem Seal Puller
  66. Homemade Valve Spring Compressor
  67. What Should I Pay For Eibachs?
  68. Trans Fluid/Filter change and Coolant drain/refill...
  69. Randomly Creeping High Idle Problem
  70. Stock spark plug wires, 7 or 8 mm?
  71. transmission oil looks dark :S
  72. how many cubic inches
  73. Northstar coil pack firing order
  74. '96 Sls: P1406: Egr
  75. GM Oil Consumption TSB, 2007
  76. Dexcool/Peak coolant
  77. noobie questions
  78. God a northstar sounds sexy, but does something sound odd
  79. Coolant leak...
  80. Northstar motor install
  81. overheating, waterpump? 2002 deville w/ 120k miles
  82. Transmission won't "kickdown" 1994 Eldorado
  83. Blocks cracking on final head torque?
  84. How to remove timeserts?
  85. crankshaft postion sensor
  86. '05 STS - Slipping Transmission at low MPH
  87. rear wheel drive conversion
  88. Cadillac Overheating Issues
  89. humming noise
  90. Clogged vacuum port to fuel pressure regulator
  91. thermostat starting to rise in strange way
  92. overheating , but ez fix?
  93. intermittent "hard start" when car at operating temp
  94. How to tell if block is timeserted?
  95. HELP ME!!!! What is the difference between ECON and Auto
  96. clogged cat = overheating?
  97. 2000-up coil pack crack
  98. 93 sts trans solenoids?
  99. Sealing off a blown head gasket
  100. Rear Main Seal
  101. Oil Life % vs. Reality
  102. Time out!!
  103. engines misses after teardown
  104. 93 STS Northstar won't start
  105. Motor build for sand rail
  106. What kind of gas mileage do you get with your Northstar?
  107. crank sensors
  108. 4.0 Northstar No Start PLEASE HELP!!!
  109. What Northstar do I have?
  110. 96 Eldorado ETC - Blown head gasket
  111. Radiator hoses
  112. headgasket pics
  113. Converter Size
  114. Cylinder Head Reconditioning
  115. 02 sts N* Engine knock
  116. MAF Issues
  117. Oil Pressure Issue - 2000 Cadillac DeVille
  118. Northstar mechanic in the Massachusetts??
  119. Need Help
  120. 93 sts misses and no 2-3 shift
  121. Good fresh tim-serted 94' SLS engine on ebay.
  122. Help, still overheating after headgasket job .
  123. Cooling fan motor bad?
  124. Roots style S/C for the northstar. Anytakers?
  125. front HVAC blower not working on 2000 deville
  126. 1995 STS won't start
  127. 94 4.6L SLS/STS Engine on Ebay
  128. oil level sensor
  129. Thought I had all the parts
  130. '99 Deville stalled and wont start
  131. 96 Deville stumbles on acceleration
  132. Spark Plug Gap
  133. P094 code
  134. 2001 Northstar 4.6 in 99 sts body??
  135. Short runner intake
  136. Bad Waterpump???
  137. Making a trip to fastchip
  138. Fan runs while car is shut off
  139. 94 Seville w/ 93 Engine & Trans (from Eldorado) Shift Problem
  140. Backfired while starting, now I have a miss!
  141. Octane Boosters
  142. Code Question
  143. sluggish n* in a 96 eldo
  144. 03 4.6 Loud engine knock caused by roller rockers
  145. I did the intake and exhaust and no difference
  146. looking at a scangauge 2 / question about pulling codes
  147. starter gives a single click
  148. PCM Data, PD42 Octane?
  149. Made the switch to Rotella...
  150. Crank seal replacement cost??
  151. Headlight problem!
  152. 99 STS blown head gasket. what to do??
  153. Turning off Injectors = Save fuel?
  154. A/C Question
  155. Two pricing question
  156. 1995 STS Performance ?
  157. I052 Code + Stalling + Instrument Panel Reset
  158. Oil pressure Sending Unit
  159. P/S pump leak
  160. Oil Leak
  161. "Low Refrigerant" & "A/C Compressor Off" B1348
  162. 95 Deville Concours performance
  163. '03 STS making turbine-like sound for 5-10 secs on cold start. Any ideas?
  164. new exhaust with #s
  165. Main bearing Torque Values? '94 4.6L SLS
  166. What tools needed to replace idle control motor on N*?
  167. Sooty Stalling 98 Deville
  168. New N* Owner - What to look for?
  169. Will the REAL Dexcool Please Stand Up?
  170. Rustling noise and loss of power
  171. Mass air flow sensor Help please
  172. oil cooler
  173. Engine just dies
  174. Swapping Engine To A Non-Northstar
  175. I have a little oil in the spark plug wells, anything to worry about?
  176. setting timing
  177. How about a Northstar Survival Guide
  178. what color is dexcool?
  179. Engine revving on its own
  180. Northstar remanufactured engine source
  181. "If it wasn't for bad luck....you know the rest
  182. Hitting 150k or more, is it realistic on my car?
  183. Time-Sert
  184. Bouncing Idle, new sparkplugs and oil after seafoam or TEC?
  185. front motor mount
  186. Is it Normal to Leak????
  187. Power steering leak
  188. 99 Northstar burning coolant somewhere!
  189. Data loging with performance monitoring and measuring devices
  190. Help With My 99' N* Hg Job
  191. Low oil pressure warning
  192. engine-trans bolts
  193. Valve Train Ticking
  194. What peformance chip is better for 02 dts?
  195. Wrong headbolts
  196. Changing HG, will heads be ok?
  197. N* Stock Internals
  198. Oil missing from pan
  199. 93-99 Dis ????
  200. So, i just talked to one of the engineers at GM that worked on the northstar
  201. 02 deville spark plug replacement
  202. Finding New Mechanic: Questions to Ask
  203. Myth!!!!! Octane 99 and prior VS 00+
  204. Interesting problem - highway stalling
  205. just installed alternator, NOW WHAT!
  206. How much horsepower in 1997 Professional Chassis (Limo)?
  207. A\C Question!!!!!!!!!!!!!!
  208. How to get out cylinder head alignment bushings???
  209. Tim Allens 400HP naturally asp. N*
  210. cracked engine block
  211. 1997 DeVille Head Gasket Repair
  212. Solid Motor Mount?
  213. lower motor mount
  214. low oil pressure / battery no charge on DIC
  215. '98 STS Camshaft
  216. 05 DTS Northstar fuel economy
  217. Leaking Head Gaskets & Extended Warranty
  218. p1375 icm 24x reference voltage too high and p1350 ignition control system
  219. 00 deville cylinder #4
  220. Northstar overheating causes
  221. locating dowels
  222. 00 deville P0300
  223. Changing spark plugs on a Northstar
  224. can't find anyone who knows the answer
  225. 94 sts strange issue
  226. 30,000 mile service
  227. 98 sts bogging and backfiring
  228. symptoms and cuases of headgasket
  229. 2007 Northstar VIN A PCM Pinouts
  230. Interesting Observation with Volant.
  231. Suggest new catorgory"Northstar Tuning"
  232. Question about Dexcool for the Northstar 4.6
  233. 99 STS in Distress
  234. p0300 Engine Misfire
  235. Need Some Feedback
  236. P0171 and P0174 codes: Intake leak?
  237. TC0073 ???? I have searched with not a REAL answer
  238. carbon on tailpipes, and why?
  239. are time serts asbsolutely necessary
  240. Replacing various parts
  241. new radiator
  242. N* HG Repair, Drop cradle or Pull engine?
  243. Cheap Mechanic in Des Moines?
  244. Cooling Fans NEED HELP.
  245. P094 = Tranny rebuilt?
  246. Problems with N* motor
  247. Considering used Northstar- need advice
  248. More Northstar head gasket questions...
  249. Help with two noises from '97 Northstar
  250. i need help on how to change my headgasket on my 99 seville sls