: Northstar Engines and System Technical Discussion



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  1. Strange coolant/heat issue 99 STS
  2. 1998 STS engine full of mystery sludge?!
  3. Rough idle-stumble on accel
  4. 95 Eldorado 4.6L Engine stalls
  5. Oil in intake manifold 4.6 1993
  6. 98 Deville Concours Preformance Exhaust???
  7. Engine year compatibility
  8. Sucessful Northstar head gasket repair in a bottle
  9. PCM 09354896 code DCHJ
  10. 1997 4.6 eldorado up hill over heats
  11. fuel injector ohms
  12. 93 sts fuel rail removal tools
  13. Air ride compressor
  14. Overheating??
  15. Codes P0122 and P1122...
  16. Motor mount replaced!! WTF!!!!!
  17. 1996 Seville STS O2 Sensor REMOVAL. CAN"T GET TO IT
  18. 96 Seville where's the 02 Oxygen Sensor Location?? PLEASE HELP WONT PASS EMISSIONS!!!
  19. Long road trips good for the Northstar?
  20. headgaskets a 2nd time?
  21. 97 eldorado w/180,000 miles, should i upgrade to a preformance coil?
  22. 94 eldorado 4.6 - no codes - stumbling/chugging - about to give up
  23. Car not turning over
  24. Codes 340 and 1016 + Fixed A.I.R. with new coil cartridge?
  25. Transmission issue
  26. spark plugs
  27. Yearly engine oil changes really necessary?
  28. Overheating problem
  29. maybe you all know more
  30. What Oil For Northstar Cams and Flat Tappets?
  31. 93 seville sts fuel rail
  32. rear main seal
  33. 93-99 Camshaft picture needed
  34. Seville 03 shaking problems after tune-up.
  35. is it the head gasket again?
  36. Problems with starting the engine
  37. Adding an Electric water Pump 95 Northstar
  38. 1995 northstar for sale *LOCKED*
  39. After WOT Car smells strong of sulfur , rotten eggs
  40. Dexool Questions
  41. 2002 caddy deville
  42. Limp. Mode help
  43. Lifter starting to tap and needs replacing,
  44. Reg oil or Synthetic oil
  45. Coolant Shooting Out
  46. Random light miss during constant hwy cruising
  47. Which PCM??
  48. Fuel Injector O-Rings- Where go?
  49. air in cooling system
  50. Best oil and spark plugs for the northstar 4.6L
  51. Enginge doesn't crank
  52. Help!! Engine idling with hiccups
  53. Tach
  54. the day has come: headgasket
  55. '99 Seville STS
  56. What are the differences between 99> and 00< motors?
  57. Why do these motors break rods?
  58. pretty betty deville
  59. how reliable is northstars limp mode
  60. 1999 deville almost overheating
  61. 3.71 ever better with smaller wheels?
  62. Refrigerant pressure
  63. Minor Coolant Leak
  64. 93 sts misfires, stalls, very rough idle, looking for cause
  65. Any thoughts? Code P1350 p1375
  66. Injector spec for a Y2000 N*
  67. oil cooler
  68. TPS issue: Codes P0122, P1122. Help!
  69. Need Help Installing Air Filter ?
  70. 2002 Deville coolant leak
  71. Blew the head gaskets replacing the motor
  72. 1997 deville stalling at idle
  73. bad headgasket
  74. N* running Hot, Real Hot
  75. 99 deville oil pump
  76. 2001 Northstar AIR Valve
  77. Hydraulic valve-lash adjustor evaluation?
  78. 99 deville - RFA U1000 Help
  79. 91 GMC Sierra, with a Northstar?
  80. 96 96 Northstar Noise and Oil light issue With Video
  81. Speedomoter Reads wrong
  82. 2001 Deville Falls Dead
  83. 98 sls overheating
  84. EVAP Purge Solenoid
  85. P0171, P0174 After replaced Plenum
  86. 97 deville overheating??
  87. Batteries, voltage, power, and Optima
  88. Intake Manifold Removal Snag
  89. Smoke
  90. Come for a vacation while your HG's are replaced
  91. Exhaust manifold swap?
  92. Temp Indicator Question!
  93. Does Anyone Have Any Ideas???
  94. 2001 deville misfire
  95. '98 heads and cams on a 2000 block
  96. Fuel Rail / Fuel Injector Removal
  97. No Spark
  98. Puffs of smoke while revving in park
  99. Warping the Heads???
  100. A/c Discharge Hose
  101. Northstar Valve seals?
  102. Main studs?
  103. Notice of price increase on HG replacement
  104. Mystery Vacuum Hose
  105. Bad Thermostats or blown Head Gasket??? Help
  106. timeserts
  107. Northstar Engine belt
  108. Question about Time Serts?
  109. Iridium Spar Plugs
  110. Stock crank HP?
  111. How much better are the 00+ headgaskets.
  112. 97 ELDARADO w/ blown H/G
  113. allante 9 engine swap to a y engine
  114. Weird transmission behavior - any ideas?
  115. 3" Exhaust all the way back?
  116. FWD Sump swap for RWD?
  117. Early engine number needed
  118. Low oil pressure enigine stop no start
  119. Need Motor Mount R&R procedure in Tech Tips
  120. Crankshaft Position Sensor
  121. 2002 Eldog
  122. changing starter on 1998 deville--have you done it?
  123. 01 STS - Engine cutting out on accel
  124. Ram Air set-up on a 95 STS
  125. NorthStar painting touch up?
  126. Camchain timing
  127. 03 front (left) motor mount help
  128. Oil filter IArea
  129. I may need all forum members help, especially those who have ordered the stud kits.
  130. Do NS engines have an "air regulator"?
  131. Injector Alternatives
  132. Best year for a NorthStar??
  133. How to remove oil filter adapter???
  134. 95 N* intake issue
  135. How to lock flywheel without $150 tool?
  136. 2001 Deville DTS PO300 Random Misfires
  137. Cadillac STS Coolant, service stability system...
  138. anyone ever use Engine Ice Hi-Performance Coolant
  139. 1994 cadillac sts coolant loss
  140. What size of Time-Sert I have to buy ?
  141. 96 Eldo ETC I found the ABS computer cover...how do I get in it?? Do I force it?
  142. 96 Eldo engine sputters and stalls. P0300 and P1380 Engine Misfire.
  143. 01 STS Water pump grumbling noise
  144. Replacement Engine
  145. Coolant loss?
  146. what is the difference between the concourse and regular?
  147. '97 DeVille SES but no current codes?
  148. 95 sts hard shifting/chugging trans?
  149. combustion gas test turned yellow
  150. Northstar Died? no vacuum, no compression on cyl 6.
  151. Myrtle Beach Repair Shop
  152. High oil pressure
  153. Transmission help
  154. P0621
  155. 96 Seville AC system
  156. air box
  157. Engine almost stalls
  158. Help needed before I break something...
  159. Lean Cruise Tune
  160. 95 seville died and wont start
  161. would bad hg's cause the lower radiator hose not to get warm??
  162. Help..Which is #2 cylinder and other question
  163. cam sensor trigger
  164. getting p0741 code please help!!
  165. need help
  166. anyone know what this writing can mean?
  167. Primary timing chain sprocket wear?
  168. Still no short run power
  169. 96 concours crank prob
  170. On Vacation, just a bit of fun street racing....
  171. What is Normal Valve Train Noise?
  172. Fpr
  173. Need urgent help with spark plug wires
  174. PCM codes P0138 and P1139
  175. could this be a hg issue?
  176. barely running Northstar
  177. slightly overheating and coolant leak
  178. Help with TCC replacement parts list
  179. radiator fans not cutting on
  180. saying goodbye
  181. Transmission problems after HG fixed!!!
  182. 1996 STS Engine seized again what could be wrong?
  183. is there supposed to be something in the bottom radiator hoes?
  184. Bad head gasket without any symptoms???
  185. Crank Pulley removal/install
  186. how to check if the headgasket is in good shape before buying?
  187. newb question about tune-ups
  188. 1999 DeVille Coolant leak
  189. Coolant C/O Question
  190. HP rating from a sticker
  191. shelby northstar
  192. Wierd shaped bolt holding in IAC
  193. Check out my Headgasket Job in the car!!!!
  194. Crossover Manifold, Pipe Gasket Part Number
  195. Intake Manifold Cracked at Bolt Heads
  196. For all of us with the fluxuating speedometer / intermittent cruise control
  197. Transmission Strengths/Weaknesses
  198. looking for head gasket repair in tx
  199. Different Headgasket Question
  200. What is the difference between VIN 9 and VIN Y 4.6L Northstars ?
  201. I need to find someone closer than Canada to do my headgaskets !!
  202. Sold one of my '97 to my best friend, now it won't start
  203. 2001 STS vac leak at intake
  204. Overheats less in 3
  205. TERRIBLE Gas mileage "help"
  206. damm am i hard headed...over heating still
  207. still overheating need help...
  208. Found Coolant in the Valley. What could it be???
  209. Difficulty level on swapping a N* 4.6?
  210. Help with engine removal for STS
  211. Can 97 N* lifters be disassembled?
  212. front motor mount
  213. A/C delete pulley
  214. coolant leak
  215. Overpressurize relief valve boot
  216. 97 deville blown head gasket question
  217. The best preventative maintenance for my 97 N*?
  218. Service Stability System
  219. duramax1980
  220. 98 NS Brackets
  221. Intake Manifold Removal, '97 SLS
  222. Northstar Bracket
  223. my 1st post transmission problems i think
  224. Priming the oil pump on a northstar engine
  225. 2000 STS, N*interchangibility?
  226. Trying to find Intake Manifold Spacer
  227. PCM wiring without a complete car harness
  228. 99 ETC Weak hot restart?
  229. deville 2000 HG ???
  230. DHS would stall upon starting... would not idle
  231. Why Check the Oil When Hot?
  232. very little coolant circulation...i hope its not a head gasket
  233. '99 STS Oil Smell?
  234. Any good Northstar Mechanics in SoCal
  235. radiator drain valve
  236. New Studs to incorporate alignment pins
  237. 1997 Power Steering Pump Questions
  238. 2000 N* Head Gasket probability
  239. 00' STS N* Conversion ???
  240. 99 Deville/Headgasket Issue
  241. Misfire PC0300 Code
  242. Code P0741...Really confused.....Need help!!!
  243. Finally tore the motor apart
  244. 1997 sts stalled, Won't start
  245. HARD loud knock @ acceleration. help
  246. 93 Northstar Dies randomly. HELP!
  247. 95 SLS throttle body vacuum plug
  248. 2006 DTS engine issue
  249. 97 northstar balancer removal
  250. Advice on Northstar Transmission???