: Northstar Engines and System Technical Discussion



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  1. 06+ STS Northstar ECM repin to 07-08, new carrer and trans install
  2. Aftermarket Temp. Gauge
  3. Coolant Supply Line
  4. Idles rough after being started in the morning
  5. Best way to clean the engine bay?
  6. 2001 Cadillac DTS Can't get up to speed, power loss, studdering, See Video
  7. Tricky Coolant Leak
  8. Coming back home
  9. 2000 DHS exhaust smoking and running poor
  10. 4 Engine Questions
  11. Is this guy being honest with me? video of a SEIZED ENGINE!!!
  12. Any thoughts on this...
  13. tap for time serts
  14. Just bought a 98 Deville, was overheating, am I paranoid?
  15. 208 at 40+ 212 at <40
  16. low oil pressure
  17. Batman's Northstar
  18. Another Wont crank issue
  19. Woohoo...Head gasket repair is done
  20. 1998 Deville acceleration slip
  21. Steering joint bolt
  22. My bone stock '98 STS pulled a 14.95 in the 1/4
  23. Weird Noise
  24. Heartland High Mileage Oil Changer Review
  25. 95 sls n* solenoid clicking
  26. Interesting find
  27. Valve cover bolts???
  28. Timing mark clarification
  29. Engine in the car repair... how many gaskets?
  30. Front hydraulic motor mount
  31. I can't get the CV joint to separate from the Trans
  32. 1993 Caddillac Eldorado - Timing Chain Issue
  33. Stud Kit Success!!
  34. Ways to increase performance?
  35. Radiator leaks and engine runs rough, no codes
  36. Ethanol Blends
  37. 98 Eldorado Starting Problems
  38. Problems removing head dowels
  39. Another visit to the track
  40. 95 vs 99 Northstar
  41. Tuning up the engine.
  42. Head Gasket Repair At Your Location!
  43. Head Gasket Paranoia
  44. catalyst converter replaced
  45. 93 STS Lots of smoke after fillup
  46. Exact oil filter wrench for 1996 Seville SLS
  47. new northstar
  48. Super Noob needs help overheating
  49. Nitrous Help: 01 DTS
  50. Head gasket removal, best practices
  51. 01 deville o2's locations?
  52. Head stud kit
  53. Documenting a swap: N* 4.6 / 97 STS
  54. 2005 DTS Twin Turbo project??
  55. No pcm data
  56. No pcm data?
  57. WIll a 98 vin 9 motor go into a 94 STS
  58. another newbie HG question
  59. NEW - 2002 Head Gasket Failure - Best Fix...
  60. Failed Smog Emissions Northstar
  61. What could it be?
  62. Exchange fluids how often?
  63. Tuning thread. Disappointed, but I understand.
  64. looking to buy a Caddy
  65. AC Delco platinum plug gap settings for N*
  66. how do i get my car to northstar preformance, uh cheaply?
  67. Engine 'misses' at stoplights
  68. where to get my head gasket repaired?
  69. Engine Shaking
  70. 4.6 Prevention and maintenance for longer life IE head gaskets.
  71. How to properly switch from red to green in a 2000 STS
  72. Water Pump Issue
  73. Lucas Oil Stabilizer
  74. Rough idle and low speed chug
  75. barS headgasket repair, has anyone tried it?
  76. Secondary Air Injection Check Valve... Bent?
  77. 2000 STS motor mount help?
  78. Oil pressure dummy light flickers...
  79. Head Bolts...
  80. Slight stumble, no codes
  81. 97 Deville wont start in the morning
  82. Stud Kit Help
  83. A kitten caused my Serpentine Belt to come off
  84. Check Coolant Level
  85. Cleaning Heads and Block
  86. Over Heating... HELP!!!
  87. 2001 deville rough idle
  88. engine grounds
  89. manifold blowoff
  90. sealant for blown heads?
  91. 1994 STS Overheating (I think)...
  92. Block Identification Numbers
  93. Snapping noise when coming to a stop..Answered Finally!!!
  94. Overheating Eldorado Help
  95. need some help
  96. 05' STS. Little help with P0102 please
  97. 2000 DTS P0300 code
  98. Head gasket repair
  99. P041 1994 deville concours
  100. Quick Oil Question
  101. rough idle, no codes, rough start
  102. coolant leak
  103. STS Radiator Hose Replacement
  104. 95 Eldorado ETC - Cooling system
  105. power steering line: o-ring?
  106. broken bolt in oil pan
  107. Water pump & crossover gasket - $$$$
  108. Help Me Please
  109. Rad Cap PSI was wrong
  110. Coolant Leak. Where's it coming from?
  111. Water pump Purge line?
  112. 5w30 or 0w30
  113. Destroying a N* Engine
  114. N* engine removal - newbee
  115. 02 DHS overheating
  116. TCC Stuck Off
  117. No clue what to do. Northstar blues
  118. problem with map sensors
  119. 2001 caddy sts seville tranny
  120. What is going on with the car?
  121. Spark Plug Wires
  122. "Hush" or "Gasp" Before Expected Throttle Response
  123. my 93 ETC Eldorado N* has a question for you guys
  124. Which spark plugs to buy?
  125. Thoughts on Dex-Cool and Head Gaskets
  126. 2001 cadillac deville small hesitations
  127. Normal Operating Temperature?
  128. Intermittent starting issue 97Seville SLS
  129. Trouble finding exhaust leak 99 Deville Y motor
  130. Is 235 too hot for a N*star on hilly roads?
  131. Spark Plugs ACDELCO or somthign els ?
  132. Good mechanics to fix head gasket in Oceanside, California area
  133. rough idle, only when in gear and brake on
  134. The first head gasket failure - 1 out of around 90 or so
  135. Tranny problems?
  136. how to install serpentine belt on 98 concours
  137. engine swap
  138. Why high fuel pressure?
  139. 1997 Northstar low speed hesitation and noise
  140. 2001 DeVille DHS / North Star motor losing power
  141. Air-Dam / Belly Splash Guard importance on cooling your N*
  142. Make Your Own Damn Motor Mount
  143. cooling fans inop p01660
  144. Hard shifting 1-2 Help!
  145. Fabricated Torque Strut for the 2000+ Northstar
  146. Horrible Engine Bucking 93 N* Allante
  147. 1998 Seville STS Performance Engine Build - STAGE I
  148. My pulley melted
  149. 01 Deville issues, no codes, no check engine light
  150. '96 Deville Coolant Change
  151. Overheating
  152. White smoke after changing starter (by removing intake manifold)
  153. No current codes but...
  154. N* Powered Camaro
  155. Strange coolant/heat issue 99 STS
  156. 1998 STS engine full of mystery sludge?!
  157. Rough idle-stumble on accel
  158. 95 Eldorado 4.6L Engine stalls
  159. Oil in intake manifold 4.6 1993
  160. 98 Deville Concours Preformance Exhaust???
  161. Engine year compatibility
  162. Sucessful Northstar head gasket repair in a bottle
  163. PCM 09354896 code DCHJ
  164. 1997 4.6 eldorado up hill over heats
  165. fuel injector ohms
  166. 93 sts fuel rail removal tools
  167. Air ride compressor
  168. Overheating??
  169. Codes P0122 and P1122...
  170. Motor mount replaced!! WTF!!!!!
  171. 1996 Seville STS O2 Sensor REMOVAL. CAN"T GET TO IT
  172. 96 Seville where's the 02 Oxygen Sensor Location?? PLEASE HELP WONT PASS EMISSIONS!!!
  173. Long road trips good for the Northstar?
  174. headgaskets a 2nd time?
  175. 97 eldorado w/180,000 miles, should i upgrade to a preformance coil?
  176. 94 eldorado 4.6 - no codes - stumbling/chugging - about to give up
  177. Car not turning over
  178. Codes 340 and 1016 + Fixed A.I.R. with new coil cartridge?
  179. Transmission issue
  180. spark plugs
  181. Yearly engine oil changes really necessary?
  182. Overheating problem
  183. maybe you all know more
  184. What Oil For Northstar Cams and Flat Tappets?
  185. 93 seville sts fuel rail
  186. rear main seal
  187. 93-99 Camshaft picture needed
  188. Seville 03 shaking problems after tune-up.
  189. is it the head gasket again?
  190. Problems with starting the engine
  191. Adding an Electric water Pump 95 Northstar
  192. 1995 northstar for sale *LOCKED*
  193. After WOT Car smells strong of sulfur , rotten eggs
  194. Dexool Questions
  195. 2002 caddy deville
  196. Limp. Mode help
  197. Lifter starting to tap and needs replacing,
  198. Reg oil or Synthetic oil
  199. Coolant Shooting Out
  200. Random light miss during constant hwy cruising
  201. Which PCM??
  202. Fuel Injector O-Rings- Where go?
  203. air in cooling system
  204. Best oil and spark plugs for the northstar 4.6L
  205. Enginge doesn't crank
  206. Help!! Engine idling with hiccups
  207. Tach
  208. the day has come: headgasket
  209. '99 Seville STS
  210. What are the differences between 99> and 00< motors?
  211. Why do these motors break rods?
  212. pretty betty deville
  213. how reliable is northstars limp mode
  214. 1999 deville almost overheating
  215. 3.71 ever better with smaller wheels?
  216. Refrigerant pressure
  217. Minor Coolant Leak
  218. 93 sts misfires, stalls, very rough idle, looking for cause
  219. Any thoughts? Code P1350 p1375
  220. Injector spec for a Y2000 N*
  221. oil cooler
  222. TPS issue: Codes P0122, P1122. Help!
  223. Need Help Installing Air Filter ?
  224. 2002 Deville coolant leak
  225. Blew the head gaskets replacing the motor
  226. 1997 deville stalling at idle
  227. bad headgasket
  228. N* running Hot, Real Hot
  229. 99 deville oil pump
  230. 2001 Northstar AIR Valve
  231. Hydraulic valve-lash adjustor evaluation?
  232. 99 deville - RFA U1000 Help
  233. 91 GMC Sierra, with a Northstar?
  234. 96 96 Northstar Noise and Oil light issue With Video
  235. Speedomoter Reads wrong
  236. 2001 Deville Falls Dead
  237. 98 sls overheating
  238. EVAP Purge Solenoid
  239. P0171, P0174 After replaced Plenum
  240. 97 deville overheating??
  241. Batteries, voltage, power, and Optima
  242. Intake Manifold Removal Snag
  243. Smoke
  244. Come for a vacation while your HG's are replaced
  245. Exhaust manifold swap?
  246. Temp Indicator Question!
  247. Does Anyone Have Any Ideas???
  248. 2001 deville misfire
  249. '98 heads and cams on a 2000 block
  250. Fuel Rail / Fuel Injector Removal