View Full Version : Northstar Engines and System Technical Discussion



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  1. Oil cooler line off
  2. swap a 2005 northstar engine (y-8th dig vin) to 2002 northstar (y-8th dig vin)
  3. Looking to swap used engine in 2001 STS, and looking for advice.
  4. Slight miss at idle and cruise. Aurora Northstar 4.0 - 1998
  5. Used Northstar swap showing signs of head gasket issues, what to do?
  6. P0420 on 2001 STS
  7. Can HG be blown or leaking and not overheat?
  8. 07 DTS vs 01 STS performance
  9. 2004 Deville Head Bolts
  10. Low oil pressure at idle unresolvable
  11. WOT procedure without tachometer?
  12. Tighten harmonic balancer
  13. Olds LX5 Shortstar head gasket issues?
  14. Secondary "marks" of repaired heads...
  15. 2005 Deville Engine Noise Grey Oil
  16. Northstar rebuild - essentials
  17. 07 DTS Mounts repalcement
  18. Cylinder diagram for 2009 STS 4.6 L motor
  19. WOT done, water pumps, engine cleaning, detailing
  20. Why are the ignition coils different colors?
  21. Will any other Model engine direct swap?
  22. What else to do while studding a 1999 Northstar V8?
  23. Is ZDDP additive supplement ok to use in a Northstar motor
  24. torque converter noise cadillac from france
  25. 1997 northstar dogbone/torque strut mount *bracket* replacement woes...
  26. 99 Deville sudden severe oil leak
  27. water pump removal
  28. 2009 STS rough start when cold
  29. 2003 STS oil level sensor
  30. Brake Cleaner and Gaskets
  31. Idle Air Control Valve and P0106 and P0506 codes
  32. STS Northstar - Street Rod
  33. slow water pump?
  34. Crankshaft Position Sensor - Install Problem
  35. Mechanic's "database" on Northstar HG failure
  36. serpentine belt differences over the years ?
  37. Head gasket in car repair 99 Deville
  38. 2001 Seville SLS - Resonator Delete
  39. Possible valve timing error after head gasket repair 99 Deviile
  40. 2004 Deville Overheat issue
  41. 2004 Deville V8 Northstar ... oil pan drain plug hole may be stripped
  42. 2005 Deville Northstar engine overheating - not head gasket related
  43. Help - stripped threads on A/C compressor bolt
  44. Engine replacement dowel points 2005 Deville?
  45. 1994 STS Won't stay running
  46. Misfire at idle speed in drive and reverse, no codes 2007
  47. Starter bolt size for 2003 Northstar
  48. Injector Circuit Open Codes P0202 - P0208, blowing the inj fuse, do I hardwire it?
  49. 95 Eldorado - rough running, backfire into intake manifold
  50. is there a need to prime fuel system?
  51. aurora N* white- smoke no coolant loss system hold pressure
  52. 650 Northstar head gasket repairs completed !!!
  53. Intake manifold clean up
  54. N* ecu tune in 2018
  55. Erratic behaviors: Can a bad body control computer cause an engine misfire?
  56. replacing camshaft actuator solenoids
  57. Hydraulic or solid motor mount
  58. Installing new cam followers - 1997 base Deville
  59. 2007 Injector Circuit Open Code Fest, P0202, P0204, P0206, P0208
  60. Dead cylinders, 2005 STS 4.6L vin A
  61. Northstar engine trouble - 1999 Eldorado
  62. Northstar 4.6 timing chain componets
  63. Northstar Performance issue?
  64. '04 Deville/ Head Gasket replacement cost?
  65. Y to 9 engine swap-'99 deville
  66. Misfiring mystery help
  67. Rear main tool confusion... again
  68. 2006 dts base C0561 P0107 P0520 P2431
  69. camcover gasket
  70. Cam retainers- which way they go?
  71. Timing Chain Tensioner
  72. Engine Rebuild Question
  73. engine swap and blletproofing 2001 aurora
  74. 1998 Deville base - O2 codes
  75. Starter motor unreliable
  76. Northstar NHP engines
  77. Northstar engine, stuck water pump
  78. Intake manifold , unbelievable or not?
  79. 2001 STS - P 0171/P 0174 lean mixture codes
  80. 2006 northstar whine/hum
  81. 2005 Deville replacement engine advice?
  82. 1999 Northstar cam gear alignment
  83. 1997 top ring gap
  84. Heavy weight engine oil?
  85. Convert 2000 VIN Y engine to VIN 9?
  86. 2005 Deville starting problem and its not the starter
  87. 2004 Seville Front Motor Mount Replacement
  88. Minor oil leak leads to $4,000.00 engine pull
  89. 1997 SLS seems to run warm
  90. Midwest Cadillac Repair completes 618 Northstar
  91. 2004 STS MAF sensor
  92. 04 northstar starting issues
  93. Wzup my fellow cadillac owners - 1999 Northstar head gaskets
  94. 2000 ESC Overheating - Any Guidance?
  95. Correct Air Fuel Ratio? Dreaded Codes P0171, P0174
  96. Seville 1999 spark plugs
  97. 1999 STS - flexplate removal
  98. All DIC codes say "HISTORY" on rough running '97 Northstar
  99. 2001 STS subframe bushings
  100. 4.6L northstar transmission bellhousing bolts size
  101. 2008 Northstar timing chain sprocket
  102. 2002 Deville With Blown Head Gasket
  103. 1999 Deville engine cooling problems
  104. 2005 Deville engine ECU...
  105. seized oil drain plug - 2000 Deville
  106. Proper Zinc Levels for your Flat Tappet Caddy Engine
  107. 2003 DeVille Transmission Fluid Filler Cap - Where to Buy Replacement?
  108. Oil pressure light on at idle - oil filter discussion
  109. Barely running northstar-'99 STS
  110. 99 STS - Ran Into a Few Problems
  111. What year 4.6's are known for poor head bolts?
  112. Timing marks - 2005 Deville
  113. How to identify VIN 9 engine, out of car
  114. Northstar wine
  115. NorthStar swap into Buick LaCrosse?
  116. New member - 1994 ETC Northstar
  117. Crack in oil pan. JB Weld?
  118. A quick 'thank you'
  119. How I fixed my head gasket/overheating problems on my '99 Northstar
  120. 2001 DHS overheating and Knocking?
  121. So how much longer can I drive with the blown head gaskets?
  122. 99 Eldorado/Looking for reccommendations for Las Vegas Mechanic - head bolts
  123. '04 Deville Engine Oil Leaks
  124. Seville 1999 - engine removal from top
  125. Northstar Performance on Performance TV
  126. Radiator hose temps - 2005 Deville
  127. Northstar ICM signals, not generated when cranking
  128. Northstar leaking/consuming lots of oil
  129. Looking for an engine swap advice
  130. 2002 SLS Fuel Regulator, Vacuum or what?
  131. 40 Ft Lbs, 45 Horsepower from a tune - VIN Y Northstar, 97 Deville.
  132. who sells, other than the dealer: the head locator pins? 03522352
  133. Seville 99, ignition cables routing
  134. Oil pressure sensor too close to motor mount
  135. Northstar flat tappet cam followers - which years?
  136. New member question 1997 Deville head gasket ?
  137. 2005 4.6l Y vin into a 2006 DTS
  138. 2005 sts northstar engine
  139. 4.6 Northstar - top overhaul
  140. 4T80E Question...
  141. 98 deville p0741 p0171 p0174
  142. Problem with fit of oil pickup tube into new oil distribution plate.
  143. Suggestions for piston ring de-carb while heads are off during HG replacement.
  144. Main bearing bolt torquing. dry or oiled?
  145. I Need help were these brackets go
  146. Intermittent "battery not charging" red indicator
  147. Head Deck Surface - Second Opinion Needed
  148. LH2 on LS mounts with a T56?
  149. 1995 Eldorado pops on acceleration, no idea what it is.
  150. no water moving 1999 seville
  151. Main bolt seats - necessity to re-thread
  152. Headgaskets and VCC to TCC
  153. 2002 DHS blown head gasket removal without removing engine
  154. Blown Head Gasket Parts Advice - 2001 DTS
  155. Head gasket failure - how it become
  156. 05 Deville Timing chain guide failure and gray oil
  157. 1999 Northstar head gasket sets - price on ebay
  158. 1999 Northstar head bolt thread repair questions
  159. 2004 SRX Idler pulley ripped out of block
  160. 1995 Eldorado hesitates a little on acceleration between 1500-2000 rpm
  161. Re-ring kit - what size to choose?
  162. Oil manifold plate unorthodox treatment
  163. Overhauling - bolts?
  164. Crack or casting imperfection?
  165. Timing Chain Guide\Tensioner "Toppings" - how to call and where to buy?
  166. 1999 Seville overheats when going up long grades
  167. Seville 2003, Code P0300 right after changed upper radiator hose
  168. FPR Vacuum Hose ?
  169. Coolant system message
  170. 1997 Northstar Eldorado - possible blown head gasket
  171. Northstar timing
  172. A poser - differential diagnosis: blown head gasket or bad coil pack (or injector)
  173. Doing head gaskets in frame
  174. 2002 Northstar hearse overheat?
  175. Losing coolant, rough running @ start-up
  176. Considering a HG fix + a possible budget rebuild
  177. Cylinder #8 Misfire, changed plugs & coil, now what?
  178. Northstar FWD or RWD owner? You NEED to study this!
  179. Northstar engine and head gasket issues
  180. Preventative water pump replacement ??
  181. 2005 Deville - Remove and Install Fuel Injectors
  182. How to evaluate a northstar before buying?
  183. how do you remove steering coupling from steering gear and ABS modulator 99 Eldorado
  184. What company make a good head gasket for the northstar engine
  185. 2002 DTS - A/C compressor clutch cycle?
  186. Which HG repair is the best GM time sert,NS300L Insert or SureGrip Head Stud Kit
  187. need information how to best and easy way to remove a engine for a 99 Eldorado
  188. 1995 4t80e output shaft came out with axle shaft?
  189. 1996 El Dorado engine knocking?
  190. My 2001 Deville's Engine is Overheating
  191. Did Cadillac fix the head bolt problem in 2005 northstar ?
  192. 4.6 Swap into 68 Deville
  193. 04 Deville - 1,3,5,7 misfiring
  194. 1996 - 2003 Northstar head bolt torque specs
  195. 2000 STS head bolt torque specs question and head photos
  196. 95 STS Northstar idles up and down pretty much all the time
  197. rear ignition cassette removal-2001
  198. Aurora L47 V8
  199. 4T80E Shift Kits?
  200. Northstar pre oil change cleaners / additives
  201. 4T80E Transmission will not engage (in any gear front or back)
  202. 2000 Eldorado Engine Noise
  203. Keeping 1st gear with T/C off on the 96-99 Northstars - Tuning update
  204. water pump removal
  205. Rear main seal question...
  206. NorthStar Top End Teardown in Car - Cylinder Head Insert Repair
  207. 1997 Northstar insert and timing help
  208. Check Engine Light won't go off - 2003 DTS
  209. Cylinder Compression
  210. P0300 - Misfires on cyls 1 and 2
  211. What's this gasket?
  212. torx size for studs studs
  213. 2000 Deville Now Burning A Quart Every 300 Miles Now What? 115k
  214. Odd possible HG failure - 2003 STS
  215. Check Coolant Level
  216. 1997 Deville Possible topend, maybe full rebuild!
  217. 2001 SLS Ignition Coil Packs
  218. Possible Head Gasket 2001 Deville
  219. 01 Overheating; suspect coolant flow Please advise.
  220. 2005 Deville Head Gasket
  221. Northstar thermostat housing leaks, possible overheating
  222. 2009 DTS 100,000 miles - burning oil smell
  223. Northstar timing chain tensioners
  224. 2000 DeVille - high temps, possible head gasket leak
  225. Hello all, I have an intake question
  226. valve roller rockers-2001
  227. Northstar block question
  228. Snakes
  229. Freeze Plugs
  230. Oil filer adapter o rings and oil level tube o ring
  231. LD8 vs LH2/LC3 Exhaust Flange
  232. Another Overheating question
  233. Cleaning Carbon Deposits on pistons/rings ??????
  234. 06 Luceren Northstar V8 overheating and heater core coolant leakage?
  235. P0140 after New Sensor
  236. freeze spray for guide pin removal
  237. Swap question
  238. Swapping a Y for a 9-2001
  239. Engines - 2001 SLS with cracked block
  240. 2000 STS wont start
  241. I cant get the front valve cover off a 1999 Seville Northstar
  242. trouble code P0175
  243. 2000 deville won't start due to gears
  244. 06 SRX N* VVT Part identification
  245. Building a 1996 Northstar base Deville engine
  246. 2005 Northstar Lifters Ticking
  247. Recommended spark plug for 2001 Northstar
  248. Rad Fan Diagnosis - 1997 SLS
  249. Deville cooling fans problem
  250. Best gasket/bolt kit for 1999 Northstar head job