: Northstar Engines and System Technical Discussion



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