: Northstar Engines and System Technical Discussion



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  1. What could it be?
  2. Exchange fluids how often?
  3. Tuning thread. Disappointed, but I understand.
  4. looking to buy a Caddy
  5. AC Delco platinum plug gap settings for N*
  6. how do i get my car to northstar preformance, uh cheaply?
  7. Engine 'misses' at stoplights
  8. where to get my head gasket repaired?
  9. Engine Shaking
  10. 4.6 Prevention and maintenance for longer life IE head gaskets.
  11. How to properly switch from red to green in a 2000 STS
  12. Water Pump Issue
  13. Lucas Oil Stabilizer
  14. Rough idle and low speed chug
  15. barS headgasket repair, has anyone tried it?
  16. Secondary Air Injection Check Valve... Bent?
  17. 2000 STS motor mount help?
  18. Oil pressure dummy light flickers...
  19. Head Bolts...
  20. Slight stumble, no codes
  21. 97 Deville wont start in the morning
  22. Stud Kit Help
  23. A kitten caused my Serpentine Belt to come off
  24. Check Coolant Level
  25. Cleaning Heads and Block
  26. Over Heating... HELP!!!
  27. 2001 deville rough idle
  28. engine grounds
  29. manifold blowoff
  30. sealant for blown heads?
  31. 1994 STS Overheating (I think)...
  32. Block Identification Numbers
  33. Snapping noise when coming to a stop..Answered Finally!!!
  34. Overheating Eldorado Help
  35. need some help
  36. 05' STS. Little help with P0102 please
  37. 2000 DTS P0300 code
  38. Head gasket repair
  39. P041 1994 deville concours
  40. Quick Oil Question
  41. rough idle, no codes, rough start
  42. coolant leak
  43. STS Radiator Hose Replacement
  44. 95 Eldorado ETC - Cooling system
  45. power steering line: o-ring?
  46. broken bolt in oil pan
  47. Water pump & crossover gasket - $$$$
  48. Help Me Please
  49. Rad Cap PSI was wrong
  50. Coolant Leak. Where's it coming from?
  51. Water pump Purge line?
  52. 5w30 or 0w30
  53. Destroying a N* Engine
  54. N* engine removal - newbee
  55. 02 DHS overheating
  56. TCC Stuck Off
  57. No clue what to do. Northstar blues
  58. problem with map sensors
  59. 2001 caddy sts seville tranny
  60. What is going on with the car?
  61. Spark Plug Wires
  62. "Hush" or "Gasp" Before Expected Throttle Response
  63. my 93 ETC Eldorado N* has a question for you guys
  64. Which spark plugs to buy?
  65. Thoughts on Dex-Cool and Head Gaskets
  66. 2001 cadillac deville small hesitations
  67. Normal Operating Temperature?
  68. Intermittent starting issue 97Seville SLS
  69. Trouble finding exhaust leak 99 Deville Y motor
  70. Is 235 too hot for a N*star on hilly roads?
  71. Spark Plugs ACDELCO or somthign els ?
  72. Good mechanics to fix head gasket in Oceanside, California area
  73. rough idle, only when in gear and brake on
  74. The first head gasket failure - 1 out of around 90 or so
  75. Tranny problems?
  76. how to install serpentine belt on 98 concours
  77. engine swap
  78. Why high fuel pressure?
  79. 1997 Northstar low speed hesitation and noise
  80. 2001 DeVille DHS / North Star motor losing power
  81. Air-Dam / Belly Splash Guard importance on cooling your N*
  82. Make Your Own Damn Motor Mount
  83. cooling fans inop p01660
  84. Hard shifting 1-2 Help!
  85. Fabricated Torque Strut for the 2000+ Northstar
  86. Horrible Engine Bucking 93 N* Allante
  87. 1998 Seville STS Performance Engine Build - STAGE I
  88. My pulley melted
  89. 01 Deville issues, no codes, no check engine light
  90. '96 Deville Coolant Change
  91. Overheating
  92. White smoke after changing starter (by removing intake manifold)
  93. No current codes but...
  94. N* Powered Camaro
  95. Strange coolant/heat issue 99 STS
  96. 1998 STS engine full of mystery sludge?!
  97. Rough idle-stumble on accel
  98. 95 Eldorado 4.6L Engine stalls
  99. Oil in intake manifold 4.6 1993
  100. 98 Deville Concours Preformance Exhaust???
  101. Engine year compatibility
  102. Sucessful Northstar head gasket repair in a bottle
  103. PCM 09354896 code DCHJ
  104. 1997 4.6 eldorado up hill over heats
  105. fuel injector ohms
  106. 93 sts fuel rail removal tools
  107. Air ride compressor
  108. Overheating??
  109. Codes P0122 and P1122...
  110. Motor mount replaced!! WTF!!!!!
  111. 1996 Seville STS O2 Sensor REMOVAL. CAN"T GET TO IT
  112. 96 Seville where's the 02 Oxygen Sensor Location?? PLEASE HELP WONT PASS EMISSIONS!!!
  113. Long road trips good for the Northstar?
  114. headgaskets a 2nd time?
  115. 97 eldorado w/180,000 miles, should i upgrade to a preformance coil?
  116. 94 eldorado 4.6 - no codes - stumbling/chugging - about to give up
  117. Car not turning over
  118. Codes 340 and 1016 + Fixed A.I.R. with new coil cartridge?
  119. Transmission issue
  120. spark plugs
  121. Yearly engine oil changes really necessary?
  122. Overheating problem
  123. maybe you all know more
  124. What Oil For Northstar Cams and Flat Tappets?
  125. 93 seville sts fuel rail
  126. rear main seal
  127. 93-99 Camshaft picture needed
  128. Seville 03 shaking problems after tune-up.
  129. is it the head gasket again?
  130. Problems with starting the engine
  131. Adding an Electric water Pump 95 Northstar
  132. 1995 northstar for sale *LOCKED*
  133. After WOT Car smells strong of sulfur , rotten eggs
  134. Dexool Questions
  135. 2002 caddy deville
  136. Limp. Mode help
  137. Lifter starting to tap and needs replacing,
  138. Reg oil or Synthetic oil
  139. Coolant Shooting Out
  140. Random light miss during constant hwy cruising
  141. Which PCM??
  142. Fuel Injector O-Rings- Where go?
  143. air in cooling system
  144. Best oil and spark plugs for the northstar 4.6L
  145. Enginge doesn't crank
  146. Help!! Engine idling with hiccups
  147. Tach
  148. the day has come: headgasket
  149. '99 Seville STS
  150. What are the differences between 99> and 00< motors?
  151. Why do these motors break rods?
  152. pretty betty deville
  153. how reliable is northstars limp mode
  154. 1999 deville almost overheating
  155. 3.71 ever better with smaller wheels?
  156. Refrigerant pressure
  157. Minor Coolant Leak
  158. 93 sts misfires, stalls, very rough idle, looking for cause
  159. Any thoughts? Code P1350 p1375
  160. Injector spec for a Y2000 N*
  161. oil cooler
  162. TPS issue: Codes P0122, P1122. Help!
  163. Need Help Installing Air Filter ?
  164. 2002 Deville coolant leak
  165. Blew the head gaskets replacing the motor
  166. 1997 deville stalling at idle
  167. bad headgasket
  168. N* running Hot, Real Hot
  169. 99 deville oil pump
  170. 2001 Northstar AIR Valve
  171. Hydraulic valve-lash adjustor evaluation?
  172. 99 deville - RFA U1000 Help
  173. 91 GMC Sierra, with a Northstar?
  174. 96 96 Northstar Noise and Oil light issue With Video
  175. Speedomoter Reads wrong
  176. 2001 Deville Falls Dead
  177. 98 sls overheating
  178. EVAP Purge Solenoid
  179. P0171, P0174 After replaced Plenum
  180. 97 deville overheating??
  181. Batteries, voltage, power, and Optima
  182. Intake Manifold Removal Snag
  183. Smoke
  184. Come for a vacation while your HG's are replaced
  185. Exhaust manifold swap?
  186. Temp Indicator Question!
  187. Does Anyone Have Any Ideas???
  188. 2001 deville misfire
  189. '98 heads and cams on a 2000 block
  190. Fuel Rail / Fuel Injector Removal
  191. No Spark
  192. Puffs of smoke while revving in park
  193. Warping the Heads???
  194. A/c Discharge Hose
  195. Northstar Valve seals?
  196. Main studs?
  197. Notice of price increase on HG replacement
  198. Mystery Vacuum Hose
  199. Bad Thermostats or blown Head Gasket??? Help
  200. timeserts
  201. Northstar Engine belt
  202. Question about Time Serts?
  203. Iridium Spar Plugs
  204. Stock crank HP?
  205. How much better are the 00+ headgaskets.
  206. 97 ELDARADO w/ blown H/G
  207. allante 9 engine swap to a y engine
  208. Weird transmission behavior - any ideas?
  209. 3" Exhaust all the way back?
  210. FWD Sump swap for RWD?
  211. Early engine number needed
  212. Low oil pressure enigine stop no start
  213. Need Motor Mount R&R procedure in Tech Tips
  214. Crankshaft Position Sensor
  215. 2002 Eldog
  216. changing starter on 1998 deville--have you done it?
  217. 01 STS - Engine cutting out on accel
  218. Ram Air set-up on a 95 STS
  219. NorthStar painting touch up?
  220. Camchain timing
  221. 03 front (left) motor mount help
  222. Oil filter IArea
  223. I may need all forum members help, especially those who have ordered the stud kits.
  224. Do NS engines have an "air regulator"?
  225. Injector Alternatives
  226. Best year for a NorthStar??
  227. How to remove oil filter adapter???
  228. 95 N* intake issue
  229. How to lock flywheel without $150 tool?
  230. 2001 Deville DTS PO300 Random Misfires
  231. Cadillac STS Coolant, service stability system...
  232. anyone ever use Engine Ice Hi-Performance Coolant
  233. 1994 cadillac sts coolant loss
  234. What size of Time-Sert I have to buy ?
  235. 96 Eldo ETC I found the ABS computer cover...how do I get in it?? Do I force it?
  236. 96 Eldo engine sputters and stalls. P0300 and P1380 Engine Misfire.
  237. 01 STS Water pump grumbling noise
  238. Replacement Engine
  239. Coolant loss?
  240. what is the difference between the concourse and regular?
  241. '97 DeVille SES but no current codes?
  242. 95 sts hard shifting/chugging trans?
  243. combustion gas test turned yellow
  244. Northstar Died? no vacuum, no compression on cyl 6.
  245. Myrtle Beach Repair Shop
  246. High oil pressure
  247. Transmission help
  248. P0621
  249. 96 Seville AC system
  250. air box