: Northstar Engines and System Technical Discussion



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  1. update on my 97 concours
  2. NA power out of a North*?
  3. 2002 what does loss of dim communication?
  4. Turbos put back?
  5. Leaking Heater Core in 1999 DeVelle
  6. Overheating: Am I screwed?
  7. Bolting filter right on the motor
  8. 94 Eldorado Oil level sensor problem
  9. o2 sensors!!!!!! argggggggg
  10. Help Codes Driving Me Insane
  11. Funny Smell
  12. 94 Seville STS History Codes???
  13. Emissions Code on 1996 STS
  14. Real unhappy with (my new) used caddy - Can't ID the DTC's
  15. Opinions on possible purchase 91 Deville
  16. Signs you need a tuneup?
  17. R/r water pump
  18. Help Me!
  19. Hard Starting STS
  20. OBD2 Reprogramming
  21. Chip or no chip?
  22. Northstar R&R Book Times
  23. Northstars & oil consumption...are there "good" & "bad" motors?
  24. 275hp to 300hp head swap question
  25. Northstar Aftermarket Support
  26. Do Northstars burn oil fast???
  27. Help!!
  28. Northstar overheating
  29. Most common problems with NS motor
  30. Engine size ?????
  31. What is the deal with the Crank Position Sensor and...
  32. sneaky coolant leak, Northstar
  33. Bad plug wires get you crazy codes
  34. stupid dipstick
  35. N* Head Gasket repair part I/ Remove engine
  36. idle speed adjust?
  37. Belt Question
  38. Emissions System
  39. 99 SLS probelms
  40. help with codes?
  41. Head Work
  42. New person here - piston replacement question
  43. How to get to plugs on 00 STS?
  44. 1995 SLS Engine and Trans
  45. tps 1995 sts adjusted
  46. are the '93 and '95 northstar computers the same?
  47. Cracked Water Pump Housing Northstar
  48. Erratic fuel level gauge & a few other ???
  49. Time serts head gaskets and cadillac refunds
  50. 1990 Sedan Deville Valve Job
  51. Limited slip...sort of
  52. Octane reading
  53. Check Oilk Level wont stop
  54. Please help..engine coolant ?....
  55. Traction Control on STS ???
  56. 96 Seville, Check Engine Light, New owner?
  57. Help with cooling system
  58. ? on seville northstar motor?
  59. Help! I have a 1997 Concours(traction c) I would love to know where this wire goes??
  60. maintenence records?
  61. rear windows fog up
  62. Northstar - Golf swap
  63. PCM codes
  64. 1997 Deville problems
  65. Smelling Coolant inside - 93 STS
  66. Battery Replacement on 95 STS
  67. Service Brake Fluid Switch
  68. Transmition shifting ?'s
  69. Engine cutout 93STS north*
  70. Oil Life Message Problem
  71. Can I get some pictures (N* mounting)?
  72. OBD codes
  73. 95-sts wont start
  74. idle sts-95
  75. Anyone know where I can find cheap o2 sensors?!
  76. So....someone wanna rent me a timesert kit?
  77. Ignition module failure?
  78. Need help understanding a code
  79. Best oil for Northstar engines?
  80. Northstar questions: engine and tranny mounts
  81. Service Engine Light
  82. Idle speed
  83. Intermitant DTC P1416, where do I start looking?
  84. phenolic spacers cleaning
  85. Regular Unleaded
  86. Throttle Body
  87. 97 Concours....SOLD!
  88. Help Codes
  89. Thermostat
  90. 4.0/4.6 Combustion Chambers
  91. Intake air sensor / resistor mod
  92. valve job? something burning......
  93. Easy method of telling you need a coolant change!!!!!
  94. 97 dedan deville speedometer display out...
  95. 4.6L engine knock at idle
  96. High Performance driving
  97. Starting Issue
  98. High octane
  99. 4.6L engine knock at idle
  100. Headgaskets
  101. hard starting, won't pass smog symptoms
  102. Info on converter lock,,code PO39
  103. Northstar engine numbers
  104. Locking converter/check engine SOON
  105. How to replace front motor MOUNT
  106. can any one help
  107. Motor Rocks
  108. Torque converter lockup?
  109. Help!
  110. Regular Gas
  111. Nitrous Kit for Northstars - It exists
  112. why do people tell me northstars are junk?
  113. Coolant Loss
  114. VERY slight valve knock on '98 STS Northstar?
  115. Won't shift out of 1st gear
  116. Let's get some performance parts!
  117. Just how fragile are they?
  118. experienced mechanic in Los Angeles
  119. RWD 5-speeds
  120. Let's get an OBD Programmer...
  121. Limiters on 96 STS
  122. 1996 northstar in 95 eldorado - Strange things happening!
  123. Technical Photo Section?
  124. service engine light is on
  125. engine compatibility
  126. code help please
  127. 99' STS low-end torque is sluggish?
  128. Blessed With Head Gasket Leakage as Well...
  129. timesert kit
  130. performance pcm/ecu mods ODB II (96+ ) (i.e. 1999 sts)
  131. Can the 300 HP be swapped with 275 HP motor?
  132. North star motor swap
  133. Diagnostic codes and running rough
  134. cam timing tool
  135. Hard Shifting Transmision
  136. Squeek, scrape, whir.
  137. transmission removal in 94 eldorado???
  138. 2001 seville sparkplug location
  139. need advice-- cooling
  140. engine removal and install procedures
  141. Temperature problem???
  142. Starter replacement, what is the easiest way?
  143. Bearings?
  144. are northstars interferene engines?
  145. northstar head warpage?
  146. "LOW ENGINE COOLANT" came on...
  147. timeserts
  148. Northstar idle speed motor instsall
  149. Rss (c)1743, 1783, 1785 ??
  150. 4T80E drain plug location?
  151. Missfire 93 sts
  152. Idle is higher than normal and fluctuates
  153. STS 13:63, you ask how?
  154. Ok I can check my codes but how do you check them individually?
  155. Cadillac Hot Rodders!
  156. Keyless Entry Programming Procedure
  157. How to change Trans. Fluid?
  158. Borla exhaust needs your help
  159. Where's the Chip?
  160. Battery No Charge light on/ Alternator?
  161. New Owner Can I work on My Seville N* myself? Is it too electronic?
  162. northstars
  163. I am New here
  164. spark plug wires
  165. Sudden Stall
  166. What would you do? (fun project)
  167. Problems that were fixed (technical question)
  168. Waterpump Replacement
  169. I broke it!!
  170. 1999 Caddy Seville Sts
  171. High Mileage Northstar Thread: Who can beat me?
  172. 120,000 Miles on a Northstar?
  173. Rusted Fuel Filter
  174. Need some technical help/ suggestions from guys that know!!
  175. turbo for a northstar?
  176. Difference in 275HP & 300HP Engines
  177. Heads
  178. What size rims ....... (technical info)
  179. 95 SLS how to check coolant levels?
  180. Looking for Time sert kit
  181. Mobil 1 Synthetic Oil
  182. Screen in the intake system
  183. 100,000+ questions
  184. PVC Valve and Fuel Filter
  185. how to seperate the trans form the motor etc
  186. Ways to tell if your northstar motor is blown........look
  187. General Deville Maintenance
  188. New street rodder issue has N* Part 2!
  189. Need supporting info RE: 4.6 head bolts
  190. Northstar motor blown at 80,000 help...........
  191. Throttel Body Plate Size ???
  192. Caddy transplant
  193. 00 - 03 Seville questions:
  194. Northstar oil burning - what to do?
  195. That Coolant thing...
  196. B1136
  197. Allante losing coolant via bypass
  198. 2000 Dts - Rough Idle
  199. Resetting Change Oil Message
  200. finally made a few mods to the STS
  201. Knock sensor blues!!!
  202. Emission Message
  203. New Struts? When to replace them.
  204. Oil
  205. STSi heads availability
  206. seeping head gasket
  207. Premium Fuel
  208. just wanted to say hi to everyone!!!!!
  209. NOS on northstar??
  210. engine squeeking
  211. Engine Problems?
  212. Engine/Coolant Temp?
  213. How much to rebuild a northstar?
  214. Is there a SLS/STS performance chip/programer yet?
  215. how to turn off tractin
  216. "Check Oil Level"
  217. coolant color
  218. Firing order-
  219. engine miss
  220. North* with a manual?????
  221. Gasoline question
  222. sls tranny problem
  223. Hot Rod Caddy or LS1?
  224. upper motor mount part numbers?
  225. Cooling system sealants....
  226. A word about air filters
  227. Some Interesting facts...
  228. Transmission valve box?
  229. SES light
  230. Northstar STS story
  231. Clearing codes
  232. Oil in Coolant
  233. Is it just me, or did they use a shoehorn to get the N'Star under the hood of my STS?
  234. 2K 4.6 NS- No worries or no probs mentioned YET??
  235. Intermittent Hesitation
  236. Hey guys..quick question!
  237. How Strong is the Northstar Bottom End?
  238. tranny slipage on 97 deville
  239. Northstar 4.0L seems a little hot. Removed Thermostat. Bad Idea?
  240. Operating Temp??????
  241. Maintain Cooling system?
  242. Northstar Pull Question
  243. cracked spark plug
  244. 98+ Seville Free cold air intake mod
  245. Clearing Codes
  246. Check Coolent Level Keeps showing up
  247. blown headgasket
  248. 1994 Concours Transmission Question
  249. burned exhaust valve's ?!?!
  250. The Northstar Issue