: Northstar Engines and System Technical Discussion



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  1. Why high fuel pressure?
  2. 1997 Northstar low speed hesitation and noise
  3. 2001 DeVille DHS / North Star motor losing power
  4. Air-Dam / Belly Splash Guard importance on cooling your N*
  5. Make Your Own Damn Motor Mount
  6. cooling fans inop p01660
  7. Hard shifting 1-2 Help!
  8. Fabricated Torque Strut for the 2000+ Northstar
  9. Horrible Engine Bucking 93 N* Allante
  10. 1998 Seville STS Performance Engine Build - STAGE I
  11. My pulley melted
  12. 01 Deville issues, no codes, no check engine light
  13. '96 Deville Coolant Change
  14. Overheating
  15. White smoke after changing starter (by removing intake manifold)
  16. No current codes but...
  17. N* Powered Camaro
  18. Strange coolant/heat issue 99 STS
  19. 1998 STS engine full of mystery sludge?!
  20. Rough idle-stumble on accel
  21. 95 Eldorado 4.6L Engine stalls
  22. Oil in intake manifold 4.6 1993
  23. 98 Deville Concours Preformance Exhaust???
  24. Engine year compatibility
  25. Sucessful Northstar head gasket repair in a bottle
  26. PCM 09354896 code DCHJ
  27. 1997 4.6 eldorado up hill over heats
  28. fuel injector ohms
  29. 93 sts fuel rail removal tools
  30. Air ride compressor
  31. Overheating??
  32. Codes P0122 and P1122...
  33. Motor mount replaced!! WTF!!!!!
  34. 1996 Seville STS O2 Sensor REMOVAL. CAN"T GET TO IT
  35. 96 Seville where's the 02 Oxygen Sensor Location?? PLEASE HELP WONT PASS EMISSIONS!!!
  36. Long road trips good for the Northstar?
  37. headgaskets a 2nd time?
  38. 97 eldorado w/180,000 miles, should i upgrade to a preformance coil?
  39. 94 eldorado 4.6 - no codes - stumbling/chugging - about to give up
  40. Car not turning over
  41. Codes 340 and 1016 + Fixed A.I.R. with new coil cartridge?
  42. Transmission issue
  43. spark plugs
  44. Yearly engine oil changes really necessary?
  45. Overheating problem
  46. maybe you all know more
  47. What Oil For Northstar Cams and Flat Tappets?
  48. 93 seville sts fuel rail
  49. rear main seal
  50. 93-99 Camshaft picture needed
  51. Seville 03 shaking problems after tune-up.
  52. is it the head gasket again?
  53. Problems with starting the engine
  54. Adding an Electric water Pump 95 Northstar
  55. 1995 northstar for sale *LOCKED*
  56. After WOT Car smells strong of sulfur , rotten eggs
  57. Dexool Questions
  58. 2002 caddy deville
  59. Limp. Mode help
  60. Lifter starting to tap and needs replacing,
  61. Reg oil or Synthetic oil
  62. Coolant Shooting Out
  63. Random light miss during constant hwy cruising
  64. Which PCM??
  65. Fuel Injector O-Rings- Where go?
  66. air in cooling system
  67. Best oil and spark plugs for the northstar 4.6L
  68. Enginge doesn't crank
  69. Help!! Engine idling with hiccups
  70. Tach
  71. the day has come: headgasket
  72. '99 Seville STS
  73. What are the differences between 99> and 00< motors?
  74. Why do these motors break rods?
  75. pretty betty deville
  76. how reliable is northstars limp mode
  77. 1999 deville almost overheating
  78. 3.71 ever better with smaller wheels?
  79. Refrigerant pressure
  80. Minor Coolant Leak
  81. 93 sts misfires, stalls, very rough idle, looking for cause
  82. Any thoughts? Code P1350 p1375
  83. Injector spec for a Y2000 N*
  84. oil cooler
  85. TPS issue: Codes P0122, P1122. Help!
  86. Need Help Installing Air Filter ?
  87. 2002 Deville coolant leak
  88. Blew the head gaskets replacing the motor
  89. 1997 deville stalling at idle
  90. bad headgasket
  91. N* running Hot, Real Hot
  92. 99 deville oil pump
  93. 2001 Northstar AIR Valve
  94. Hydraulic valve-lash adjustor evaluation?
  95. 99 deville - RFA U1000 Help
  96. 91 GMC Sierra, with a Northstar?
  97. 96 96 Northstar Noise and Oil light issue With Video
  98. Speedomoter Reads wrong
  99. 2001 Deville Falls Dead
  100. 98 sls overheating
  101. EVAP Purge Solenoid
  102. P0171, P0174 After replaced Plenum
  103. 97 deville overheating??
  104. Batteries, voltage, power, and Optima
  105. Intake Manifold Removal Snag
  106. Smoke
  107. Come for a vacation while your HG's are replaced
  108. Exhaust manifold swap?
  109. Temp Indicator Question!
  110. Does Anyone Have Any Ideas???
  111. 2001 deville misfire
  112. '98 heads and cams on a 2000 block
  113. Fuel Rail / Fuel Injector Removal
  114. No Spark
  115. Puffs of smoke while revving in park
  116. Warping the Heads???
  117. A/c Discharge Hose
  118. Northstar Valve seals?
  119. Main studs?
  120. Notice of price increase on HG replacement
  121. Mystery Vacuum Hose
  122. Bad Thermostats or blown Head Gasket??? Help
  123. timeserts
  124. Northstar Engine belt
  125. Question about Time Serts?
  126. Iridium Spar Plugs
  127. Stock crank HP?
  128. How much better are the 00+ headgaskets.
  129. 97 ELDARADO w/ blown H/G
  130. allante 9 engine swap to a y engine
  131. Weird transmission behavior - any ideas?
  132. 3" Exhaust all the way back?
  133. FWD Sump swap for RWD?
  134. Early engine number needed
  135. Low oil pressure enigine stop no start
  136. Need Motor Mount R&R procedure in Tech Tips
  137. Crankshaft Position Sensor
  138. 2002 Eldog
  139. changing starter on 1998 deville--have you done it?
  140. 01 STS - Engine cutting out on accel
  141. Ram Air set-up on a 95 STS
  142. NorthStar painting touch up?
  143. Camchain timing
  144. 03 front (left) motor mount help
  145. Oil filter IArea
  146. I may need all forum members help, especially those who have ordered the stud kits.
  147. Do NS engines have an "air regulator"?
  148. Injector Alternatives
  149. Best year for a NorthStar??
  150. How to remove oil filter adapter???
  151. 95 N* intake issue
  152. How to lock flywheel without $150 tool?
  153. 2001 Deville DTS PO300 Random Misfires
  154. Cadillac STS Coolant, service stability system...
  155. anyone ever use Engine Ice Hi-Performance Coolant
  156. 1994 cadillac sts coolant loss
  157. What size of Time-Sert I have to buy ?
  158. 96 Eldo ETC I found the ABS computer cover...how do I get in it?? Do I force it?
  159. 96 Eldo engine sputters and stalls. P0300 and P1380 Engine Misfire.
  160. 01 STS Water pump grumbling noise
  161. Replacement Engine
  162. Coolant loss?
  163. what is the difference between the concourse and regular?
  164. '97 DeVille SES but no current codes?
  165. 95 sts hard shifting/chugging trans?
  166. combustion gas test turned yellow
  167. Northstar Died? no vacuum, no compression on cyl 6.
  168. Myrtle Beach Repair Shop
  169. High oil pressure
  170. Transmission help
  171. P0621
  172. 96 Seville AC system
  173. air box
  174. Engine almost stalls
  175. Help needed before I break something...
  176. Lean Cruise Tune
  177. 95 seville died and wont start
  178. would bad hg's cause the lower radiator hose not to get warm??
  179. Help..Which is #2 cylinder and other question
  180. cam sensor trigger
  181. getting p0741 code please help!!
  182. need help
  183. anyone know what this writing can mean?
  184. Primary timing chain sprocket wear?
  185. Still no short run power
  186. 96 concours crank prob
  187. On Vacation, just a bit of fun street racing....
  188. What is Normal Valve Train Noise?
  189. Fpr
  190. Need urgent help with spark plug wires
  191. PCM codes P0138 and P1139
  192. could this be a hg issue?
  193. barely running Northstar
  194. slightly overheating and coolant leak
  195. Help with TCC replacement parts list
  196. radiator fans not cutting on
  197. saying goodbye
  198. Transmission problems after HG fixed!!!
  199. 1996 STS Engine seized again what could be wrong?
  200. is there supposed to be something in the bottom radiator hoes?
  201. Bad head gasket without any symptoms???
  202. Crank Pulley removal/install
  203. how to check if the headgasket is in good shape before buying?
  204. newb question about tune-ups
  205. 1999 DeVille Coolant leak
  206. Coolant C/O Question
  207. HP rating from a sticker
  208. shelby northstar
  209. Wierd shaped bolt holding in IAC
  210. Check out my Headgasket Job in the car!!!!
  211. Crossover Manifold, Pipe Gasket Part Number
  212. Intake Manifold Cracked at Bolt Heads
  213. For all of us with the fluxuating speedometer / intermittent cruise control
  214. Transmission Strengths/Weaknesses
  215. looking for head gasket repair in tx
  216. Different Headgasket Question
  217. What is the difference between VIN 9 and VIN Y 4.6L Northstars ?
  218. I need to find someone closer than Canada to do my headgaskets !!
  219. Sold one of my '97 to my best friend, now it won't start
  220. 2001 STS vac leak at intake
  221. Overheats less in 3
  222. TERRIBLE Gas mileage "help"
  223. damm am i hard headed...over heating still
  224. still overheating need help...
  225. Found Coolant in the Valley. What could it be???
  226. Difficulty level on swapping a N* 4.6?
  227. Help with engine removal for STS
  228. Can 97 N* lifters be disassembled?
  229. front motor mount
  230. A/C delete pulley
  231. coolant leak
  232. Overpressurize relief valve boot
  233. 97 deville blown head gasket question
  234. The best preventative maintenance for my 97 N*?
  235. Service Stability System
  236. duramax1980
  237. 98 NS Brackets
  238. Intake Manifold Removal, '97 SLS
  239. Northstar Bracket
  240. my 1st post transmission problems i think
  241. Priming the oil pump on a northstar engine
  242. 2000 STS, N*interchangibility?
  243. Trying to find Intake Manifold Spacer
  244. PCM wiring without a complete car harness
  245. 99 ETC Weak hot restart?
  246. deville 2000 HG ???
  247. DHS would stall upon starting... would not idle
  248. Why Check the Oil When Hot?
  249. very little coolant circulation...i hope its not a head gasket
  250. '99 STS Oil Smell?