: Northstar Engines and System Technical Discussion



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  1. Yearly engine oil changes really necessary?
  2. Overheating problem
  3. maybe you all know more
  4. What Oil For Northstar Cams and Flat Tappets?
  5. 93 seville sts fuel rail
  6. rear main seal
  7. 93-99 Camshaft picture needed
  8. Seville 03 shaking problems after tune-up.
  9. is it the head gasket again?
  10. Problems with starting the engine
  11. Adding an Electric water Pump 95 Northstar
  12. 1995 northstar for sale *LOCKED*
  13. After WOT Car smells strong of sulfur , rotten eggs
  14. Dexool Questions
  15. 2002 caddy deville
  16. Limp. Mode help
  17. Lifter starting to tap and needs replacing,
  18. Reg oil or Synthetic oil
  19. Coolant Shooting Out
  20. Random light miss during constant hwy cruising
  21. Which PCM??
  22. Fuel Injector O-Rings- Where go?
  23. air in cooling system
  24. Best oil and spark plugs for the northstar 4.6L
  25. Enginge doesn't crank
  26. Help!! Engine idling with hiccups
  27. Tach
  28. the day has come: headgasket
  29. '99 Seville STS
  30. What are the differences between 99> and 00< motors?
  31. Why do these motors break rods?
  32. pretty betty deville
  33. how reliable is northstars limp mode
  34. 1999 deville almost overheating
  35. 3.71 ever better with smaller wheels?
  36. Refrigerant pressure
  37. Minor Coolant Leak
  38. 93 sts misfires, stalls, very rough idle, looking for cause
  39. Any thoughts? Code P1350 p1375
  40. Injector spec for a Y2000 N*
  41. oil cooler
  42. TPS issue: Codes P0122, P1122. Help!
  43. Need Help Installing Air Filter ?
  44. 2002 Deville coolant leak
  45. Blew the head gaskets replacing the motor
  46. 1997 deville stalling at idle
  47. bad headgasket
  48. N* running Hot, Real Hot
  49. 99 deville oil pump
  50. 2001 Northstar AIR Valve
  51. Hydraulic valve-lash adjustor evaluation?
  52. 99 deville - RFA U1000 Help
  53. 91 GMC Sierra, with a Northstar?
  54. 96 96 Northstar Noise and Oil light issue With Video
  55. Speedomoter Reads wrong
  56. 2001 Deville Falls Dead
  57. 98 sls overheating
  58. EVAP Purge Solenoid
  59. P0171, P0174 After replaced Plenum
  60. 97 deville overheating??
  61. Batteries, voltage, power, and Optima
  62. Intake Manifold Removal Snag
  63. Smoke
  64. Come for a vacation while your HG's are replaced
  65. Exhaust manifold swap?
  66. Temp Indicator Question!
  67. Does Anyone Have Any Ideas???
  68. 2001 deville misfire
  69. '98 heads and cams on a 2000 block
  70. Fuel Rail / Fuel Injector Removal
  71. No Spark
  72. Puffs of smoke while revving in park
  73. Warping the Heads???
  74. A/c Discharge Hose
  75. Northstar Valve seals?
  76. Main studs?
  77. Notice of price increase on HG replacement
  78. Mystery Vacuum Hose
  79. Bad Thermostats or blown Head Gasket??? Help
  80. timeserts
  81. Northstar Engine belt
  82. Question about Time Serts?
  83. Iridium Spar Plugs
  84. Stock crank HP?
  85. How much better are the 00+ headgaskets.
  86. 97 ELDARADO w/ blown H/G
  87. allante 9 engine swap to a y engine
  88. Weird transmission behavior - any ideas?
  89. 3" Exhaust all the way back?
  90. FWD Sump swap for RWD?
  91. Early engine number needed
  92. Low oil pressure enigine stop no start
  93. Need Motor Mount R&R procedure in Tech Tips
  94. Crankshaft Position Sensor
  95. 2002 Eldog
  96. changing starter on 1998 deville--have you done it?
  97. 01 STS - Engine cutting out on accel
  98. Ram Air set-up on a 95 STS
  99. NorthStar painting touch up?
  100. Camchain timing
  101. 03 front (left) motor mount help
  102. Oil filter IArea
  103. I may need all forum members help, especially those who have ordered the stud kits.
  104. Do NS engines have an "air regulator"?
  105. Injector Alternatives
  106. Best year for a NorthStar??
  107. How to remove oil filter adapter???
  108. 95 N* intake issue
  109. How to lock flywheel without $150 tool?
  110. 2001 Deville DTS PO300 Random Misfires
  111. Cadillac STS Coolant, service stability system...
  112. anyone ever use Engine Ice Hi-Performance Coolant
  113. 1994 cadillac sts coolant loss
  114. What size of Time-Sert I have to buy ?
  115. 96 Eldo ETC I found the ABS computer cover...how do I get in it?? Do I force it?
  116. 96 Eldo engine sputters and stalls. P0300 and P1380 Engine Misfire.
  117. 01 STS Water pump grumbling noise
  118. Replacement Engine
  119. Coolant loss?
  120. what is the difference between the concourse and regular?
  121. '97 DeVille SES but no current codes?
  122. 95 sts hard shifting/chugging trans?
  123. combustion gas test turned yellow
  124. Northstar Died? no vacuum, no compression on cyl 6.
  125. Myrtle Beach Repair Shop
  126. High oil pressure
  127. Transmission help
  128. P0621
  129. 96 Seville AC system
  130. air box
  131. Engine almost stalls
  132. Help needed before I break something...
  133. Lean Cruise Tune
  134. 95 seville died and wont start
  135. would bad hg's cause the lower radiator hose not to get warm??
  136. Help..Which is #2 cylinder and other question
  137. cam sensor trigger
  138. getting p0741 code please help!!
  139. need help
  140. anyone know what this writing can mean?
  141. Primary timing chain sprocket wear?
  142. Still no short run power
  143. 96 concours crank prob
  144. On Vacation, just a bit of fun street racing....
  145. What is Normal Valve Train Noise?
  146. Fpr
  147. Need urgent help with spark plug wires
  148. PCM codes P0138 and P1139
  149. could this be a hg issue?
  150. barely running Northstar
  151. slightly overheating and coolant leak
  152. Help with TCC replacement parts list
  153. radiator fans not cutting on
  154. saying goodbye
  155. Transmission problems after HG fixed!!!
  156. 1996 STS Engine seized again what could be wrong?
  157. is there supposed to be something in the bottom radiator hoes?
  158. Bad head gasket without any symptoms???
  159. Crank Pulley removal/install
  160. how to check if the headgasket is in good shape before buying?
  161. newb question about tune-ups
  162. 1999 DeVille Coolant leak
  163. Coolant C/O Question
  164. HP rating from a sticker
  165. shelby northstar
  166. Wierd shaped bolt holding in IAC
  167. Check out my Headgasket Job in the car!!!!
  168. Crossover Manifold, Pipe Gasket Part Number
  169. Intake Manifold Cracked at Bolt Heads
  170. For all of us with the fluxuating speedometer / intermittent cruise control
  171. Transmission Strengths/Weaknesses
  172. looking for head gasket repair in tx
  173. Different Headgasket Question
  174. What is the difference between VIN 9 and VIN Y 4.6L Northstars ?
  175. I need to find someone closer than Canada to do my headgaskets !!
  176. Sold one of my '97 to my best friend, now it won't start
  177. 2001 STS vac leak at intake
  178. Overheats less in 3
  179. TERRIBLE Gas mileage "help"
  180. damm am i hard headed...over heating still
  181. still overheating need help...
  182. Found Coolant in the Valley. What could it be???
  183. Difficulty level on swapping a N* 4.6?
  184. Help with engine removal for STS
  185. Can 97 N* lifters be disassembled?
  186. front motor mount
  187. A/C delete pulley
  188. coolant leak
  189. Overpressurize relief valve boot
  190. 97 deville blown head gasket question
  191. The best preventative maintenance for my 97 N*?
  192. Service Stability System
  193. duramax1980
  194. 98 NS Brackets
  195. Intake Manifold Removal, '97 SLS
  196. Northstar Bracket
  197. my 1st post transmission problems i think
  198. Priming the oil pump on a northstar engine
  199. 2000 STS, N*interchangibility?
  200. Trying to find Intake Manifold Spacer
  201. PCM wiring without a complete car harness
  202. 99 ETC Weak hot restart?
  203. deville 2000 HG ???
  204. DHS would stall upon starting... would not idle
  205. Why Check the Oil When Hot?
  206. very little coolant circulation...i hope its not a head gasket
  207. '99 STS Oil Smell?
  208. why didnt gm recall northstar engines for head gasket?
  209. Any good Northstar Mechanics in SoCal
  210. radiator drain valve
  211. New Studs to incorporate alignment pins
  212. 1997 Power Steering Pump Questions
  213. 2000 N* Head Gasket probability
  214. 00' STS N* Conversion ???
  215. 99 Deville/Headgasket Issue
  216. Misfire PC0300 Code
  217. Code P0741...Really confused.....Need help!!!
  218. Finally tore the motor apart
  219. 1997 sts stalled, Won't start
  220. HARD loud knock @ acceleration. help
  221. 93 Northstar Dies randomly. HELP!
  222. 95 SLS throttle body vacuum plug
  223. 2006 DTS engine issue
  224. 97 northstar balancer removal
  225. Advice on Northstar Transmission???
  226. oil in the antifreeze & overheating
  227. HG blown 375 days after a $3500 repair
  228. Northstar Coil Bank
  229. Engine wiring harness removal
  230. 97 seville sls coolant loss
  231. 98 deville engine question
  232. STS Blowing Out Oil But From WHERE?????
  233. '93 STS Oil cooler
  234. What kind of seal installer to use?
  235. Northstar head gasket replacement with warranty, Louisville KY - 1500 + parts
  236. how easy is changing the thermostat yourself
  237. Low speed stall
  238. Coolant Issue "00 STS"
  239. failed state inspection because of p0507
  240. Alternator questions....
  241. Bars Leaks Liquid Copper?
  242. which of these codes will cause my service engine light to be on?
  243. 97 Deville oil pan leak
  244. Please Help with long cranking time
  245. high idle
  246. Aftermarket Intake for '99 DeVille base model
  247. 02 Deville rough idle & codes
  248. 1998 Eldorado Head Gasket - 2nd time in 375-days
  249. Started to hear an intermittent grinding noise
  250. $788 To fix P0410 Code