: Northstar Engines and System Technical Discussion



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