: Northstar Engines and System Technical Discussion



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  1. Missed one connection
  2. Those Damn HEAD GASKETS
  3. LC3 FWD Swap?
  4. ? For Ewill or AJ
  5. looking for pictures of northstar valvetrain
  6. So, here are the symptoms, whats wrong
  7. Northstar Valvetrain Clatter
  8. 200 DeVille Blows hot air at low speed turns cold
  9. Could it be the Water Pump Knocking
  10. Can anyone tell me whats wrong?
  11. Front Valvetrain Clacking
  12. labor cost to replace o2 sensor????
  13. Difference between VIN Y and VIN 9
  14. Got Code P1415 Please Help
  15. 2000 Deville with northstar
  16. 1034-loss of PCM data
  17. Obd I P046
  18. Computer/wiring problems
  19. Need help on 98 Seville/Northstar
  20. New HG Installed on a 99, Pings on Start Up?
  21. Got my 05 Deville back from Dealer!! and extra part for sale.
  22. Need help - going to see a 98 Seville STS on Sat, what do I check?
  23. Sick Tranny?
  24. Engine Help!!!
  25. 2nd annual midwest meet !
  26. 2001 Cadillac SLS LD8 Bore-increase
  27. White Smoke coming from front of car
  28. !996 Deville help troubleshoot
  29. I have a question about cold startswith N*??
  30. How do you disable the traction control perm without having to press the button in...
  31. 94 N* EGR valve ?? Engine stumbles.
  32. P0121, P0507 High Idle???
  33. 94 ETC no shift, wont idle
  34. Looking for '98 ETC mods
  35. What's your preference for plugs and wires ?
  36. intake manifold exploded/hole after backfire??
  37. 95 STS Cooling System Quirks
  38. MSD ignition
  39. Idea for vehicle to do Northstar swap on.
  40. NEED HELP - HAVE CODES P1416 and P0101
  41. quote???
  42. FPR replacement on 94 N*
  43. torker
  44. Sticking gas pedal????, high idle all of the sudden???? What do I check??? PLZ HELP!!
  45. Crankshaft & Cam sensors questions
  46. Why is my '96 Northstar now using oil?
  47. how to search forums..and cpk sensor question (2000 cadillac stalling)
  48. O2 Sensor Questions
  49. How can you tell if your HG's are shot?
  50. Rebuilt N*
  51. 97 STS vs. The drag strip
  52. 94 northstar starting problem
  53. Can i use synthetic oil in northstar?
  54. Getting Screwed
  55. Where is the main engine to body ground?
  56. white smoke n hp loss
  57. Is it me, or are alot of N*s having cracked blocks
  58. this is not an arguement thread for oil !
  59. 95 northstar tranny
  60. Is It Possible To???
  61. Engine stopped at the end of an exit ramp Any IDEAS WHY?
  62. Serpentine belt
  63. Need a VIN to a STS with the Z(W) option, I have the option but I don't like the Euro
  64. Removing EGR on a'96 SLS
  65. Whats the easy way to change the alternator on a Northstar? (99 Deville)
  66. Northstar shifting past redline
  67. 93/94 engines
  68. No Heat at Idle
  69. What's involved to drop the oil pan?
  70. Iradium spark plugs for 99deville? Better or worse? What the best plug & wires??
  71. Tell me about Force Motors/pressure control solenoids
  72. 99 Head Gasket Warranty?
  73. How can u save gas on a 99 deville?
  74. PC0327 - 96DeVille
  75. 1995 STS Cooling problems?
  76. Sts engine has this knocking sound
  77. Heater Core Leak/ Need Some Help, Please
  78. GM MAF sensor information and Discussion
  79. bottom end problems??
  80. Car runs hot but doesn't over heat
  81. Fuel Line Leak
  82. I have a cracked block, what next?
  83. RTV Silicone on Transmission Side Cover?
  84. hypothetically speaking
  85. 02 STS uses tons of oil
  86. Northstar Modifications
  87. 10w40 in N*
  88. 94 STS starts only if pressing gas, idles rough, dies after a couple minutes
  89. upgrading 94 concours
  90. '98 STS valve cover
  91. HELP- Dropped a bolt in the intake valley
  92. Intake manifold crack?
  93. Need Some Code Help 02 Seville
  94. Crankshaft position sensor
  95. engine compatibility
  96. 1994 DeVille Concourse
  97. misfire at idle
  98. Need help removing 99 STS northstar motor
  99. 1st time motor pull for HG on 99 N*, some questions
  100. 97 Etc N* Head Gasket Project
  101. Headgasket Leaks & Repairs
  102. check coolant light on???
  103. High idle/ IAC clicking?
  104. HELP!! Fuel Rail Recall Problems 1996 Seville
  105. Engine stutter/punch
  106. P0741 TCC Stuck ON, tried much, what next
  107. What is the Northstar suppose to sound like?
  108. 2003 Sts 0-70
  109. IAC valve
  110. strange rumble sound during hard acceleration.
  111. 2002 STC - Front Engine Mount Broken
  112. Mobil 1 5W30 meets GM spec 4718M but Mobil 1 10W30 DOES NOT. WHAT GIVES?
  113. Unbolting "beauty cover" on a 1999 Deville What GIVES
  114. Where is my IAT Sensor located? 99 sts
  115. 1997 Seville SLS
  116. Arizona Cadillac Owners Cheap Northstar Engine
  117. questions about PC0300 code on 96 deville
  118. Help with this code...97 Cadillac deville
  119. Drive vs 3 What's better???
  120. Cam numbers?
  121. What Spark Plugs for a 1999 DeVille Northstar?
  122. Using synthetic oil in a Northstar-Why does Cadillac recommend 10W30?
  123. Engine Oil Myths including ZDP by GM
  124. anyone ever use HEAL-A-SEAL
  125. Does vacuum sound from Surge Tank equal head gaskets?
  126. 94 Northstar Flexplate knocking noice. HELP!!
  127. 2003 DHS - Sluggish - EGR?
  128. Whirring/grinding That's Speed Sensitive
  129. 2002 deville/dhs engine trouble
  130. How can I clean the Mass Air Flow??
  131. Thanks for nothing, Northstar.
  132. P0147 - Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 3 - overheating
  133. Crank sensor tech 95 sts
  134. 1st gear WOT
  135. The End
  136. 99 STS Turbo charged video
  137. valve seals
  138. 1999 Seville Ignition DTC Help!
  139. Smoking Northstar?
  140. How long is your NS dipstick?
  141. weep holes
  142. engine swap for a 2001 dts
  143. P0741 - TCC System Stuck Off
  144. new Delco spark plug wires installed
  145. 1998 Deville overheating
  146. Help Having A Heart Attack! P039 / TRanny?
  147. N* programmer?
  148. Is it possible?
  149. Northstar Buick
  150. N* Runs Rough at Cold Start
  151. Bank 1 , 2 ??????
  152. Engine build
  153. P0300,p - Engine Misfire Detected 2002 deville, help please
  154. 2003 Deville with RWD
  155. Starter location
  156. Questions, Questions, and more Questions
  157. 93 sts traction disabled
  158. rental lincoln
  159. how to stay away from power loss
  160. 96 sts supercharger
  161. Are headgasket issues getting more common lately?
  162. 1998 Seville STS Chiptuning
  163. Tranny problems?
  164. Northstar Dyno Registry
  165. New Engine...climate control issues.
  166. Cryogenics
  167. My Photo Essay N* Head Gasket Repair Job
  168. Custom intake and nitrous
  169. 94 concours
  170. SLS Y-Code Engine: Do I need to replace the EGR Valve? PCM?
  171. service manual
  172. Possible Applications for Northstar?
  173. Need help....PLZ!!
  174. so i got a few PCM codes
  175. GM's Veiw on Fuel and Oil Additives
  176. How do I Reset the Change Oil Message?
  177. so when i went to pull codes, it just said all
  178. T061 T083
  179. 97 Deville No Longer Starts
  180. help on my 99' seville sls
  181. Starting issue
  182. 97 SLS Motor Swap to an 03. Is it possible?
  183. head
  184. 99 SLS and Straight DexCool rather than 50/50
  185. No 1st Gear!!!
  186. Cheap Northstar in NH, 35,000 miles
  187. Steering Wheel puff of smoke
  188. on the tranny subject
  189. Talk about luck!!
  190. New motor runs a lil hotter?
  191. o2 sensor question
  192. What is HOT for a blown head gasket
  193. Need Help Info On Where To Buy Rebuilt Engine
  194. compatable parts
  195. NorthStar swap wiring harness
  196. product question
  197. How long do you think caddy will keep the N*?
  198. SS Fuel Rail Removal
  199. Would this be a wise choice? [CAI] on a 184,000 mile northstar
  200. E85 on northstar ???
  201. just got my Plates
  202. 1996 Cadillac DeVille NO CODES ????
  203. Engine code - EOP
  204. Type of engine?
  205. Turbo Charged STS Cadillac
  206. Northstar Cam specs
  207. How can I drive 1000 miles with a coolant leak?
  208. To Rebuild or not.
  209. Do you use dealer for Northstar repairs?
  210. How long do Northstar engines last?
  211. 4.6 northstar fuel pressure?
  212. 150 miles in limp home mode
  213. CKP Question for One of the Techs
  214. Any problems trying 20W-50 in a '97?
  215. New 95' STS owner with tech question
  216. tune up ,whats involved?
  217. Oh shoot...need help ASAP...:(
  218. Radiator Cooling Fans not running
  219. Ram Air! (Maybe)
  220. Engine runs a bit rough during cold winter starts
  221. "break in" period for new Northstar engine
  222. How many miles to you get per tankfull with your north*?
  223. Inserts
  224. GM now offers Premium Remanufactured 4.6L Northstar
  225. 00 to 03 engine in a 98 or 99 Seville.
  226. recommended shop in Toronto/Kitchener area
  227. After head gasket repair engine knocks
  228. transaxel fluid change
  229. N* Injectors and Fuel Pressure Regulator
  230. transaxel filter
  231. 2002 plentum leak
  232. Sts Running Terrible
  233. 96 Cylinder head on 93 block
  234. My car has 121k on it..should I change the trany fluid?
  235. 96 to 99 Eldo, Deville, and 96, 97 Seville Tuning
  236. valve noise at startup
  237. Breaking in a N*
  238. Invisible leak (coolant)
  239. Another seafoam thread
  240. Is there an easy way to change coolant?
  241. what is considered normal coolant temperture for a north*?
  242. please identify mystery black box 01 DTS
  243. Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know
  244. Flushing Radiator
  245. Are there any worthwhile performance mods for the 98 north*?
  246. Was there more then one north* engine in 1998?
  247. Three (3) Codes on 1996 SLS: P1406, P0401, P0108
  248. Northstar Air Consumption.
  249. Eldo Gone....
  250. 4T80-E Transmission Fluid Change - DONE!