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High Mileage Northstar Thread: Who can beat me? Northstar Swaps - What years are interchangeable and the differences Pre-2000 Ignition Control Module (ICM) - How It Works Root Cause of Head gasket Failure and a Fix? Northstar Headgasket/Cracked Block/Bolt Failure? Please let us know Maintaining Northstar Engines *A must Read* Northstar FWD or RWD owner? You NEED to study this! 1996 - 2003 Northstar head bolt torque specs Northstar intake manifold swap question - 2000 redesign ? Northstar Vehicle Production Numbers 1993-2009 Engine Coolant Temperature Gauges / Cooling Fans Operation Explained Everything You ever Wanted To Know About Cooling System Sealant Tabs Northstar Ring Cleaning Procedure and proper oil level - TSB Temperature Gauge Dampening Acronyms How To Pull Codes (DTC's) 1993 - 1995 Northstar Chip Mods Stubborn Water Pump Removal Engine tap Slight miss at idle and cruise. Aurora Northstar 4.0 - 1998 Looking to swap used engine in 2001 STS, and looking for advice. Used Northstar swap showing signs of head gasket issues, what to do? Can HG be blown or leaking and not overheat? P0420 on 2001 STS WOT procedure without tachometer? 07 DTS vs 01 STS performance 07 DTS Mounts repalcement Low oil pressure at idle unresolvable 2004 Deville Head Bolts Tighten harmonic balancer Olds LX5 Shortstar head gasket issues? Secondary "marks" of repaired heads... Northstar rebuild - essentials 2005 Deville Engine Noise Grey Oil Oil leak 2004 DHS could switching to Syn oil at 60k cause a leak or make one worse WOT done, water pumps, engine cleaning, detailing Cylinder diagram for 2009 STS 4.6 L motor Why are the ignition coils different colors? WOT - is this the ONLY way to remove carbon buildup? Northstar old problems fixed? Will any other Model engine direct swap? 1997 northstar dogbone/torque strut mount *bracket* replacement woes... What else to do while studding a 1999 Northstar V8? Is ZDDP additive supplement ok to use in a Northstar motor torque converter noise cadillac from france 1997 Deville Possible topend, maybe full rebuild! Mechanic's "database" on Northstar HG failure 99 Deville sudden severe oil leak water pump removal 2009 STS rough start when cold 2003 STS oil level sensor Is adding too much oil bad? Brake Cleaner and Gaskets STS Northstar - Street Rod Idle Air Control Valve and P0106 and P0506 codes 2003 DeVille Transmission Fluid Filler Cap - Where to Buy Replacement? slow water pump? Crankshaft Position Sensor - Install Problem serpentine belt differences over the years ? Head gasket in car repair 99 Deville Possible valve timing error after head gasket repair 99 Deviile 2001 Seville SLS - Resonator Delete 2004 Deville Overheat issue Help - stripped threads on A/C compressor bolt 2005 Deville Northstar engine overheating - not head gasket related 2005 Deville replacement engine advice? 2004 Deville V8 Northstar ... oil pan drain plug hole may be stripped Engine replacement dowel points 2005 Deville? 95 Eldorado - rough running, backfire into intake manifold 1994 STS Won't stay running 1998 Northstar throttle sticking. Misfire at idle speed in drive and reverse, no codes 2007 650 Northstar head gasket repairs completed !!! CHRFAB cams installed - 98 STS - the results are in Problem with fit of oil pickup tube into new oil distribution plate. Injector Circuit Open Codes P0202 - P0208, blowing the inj fuse, do I hardwire it? Starter bolt size for 2003 Northstar NEW - 2002 Head Gasket Failure - Best Fix... is there a need to prime fuel system? aurora N* white- smoke no coolant loss system hold pressure N* ecu tune in 2018 Intake manifold clean up Erratic behaviors: Can a bad body control computer cause an engine misfire? replacing camshaft actuator solenoids Hydraulic or solid motor mount Installing new cam followers - 1997 base Deville Y to 9 engine swap-'99 deville 2007 Injector Circuit Open Code Fest, P0202, P0204, P0206, P0208 Northstar engine trouble - 1999 Eldorado Dead cylinders, 2005 STS 4.6L vin A Northstar 4.6 timing chain componets Cadillac northstar engine year identification Northstar Performance issue? P0171 - P0174 lean mixture codes, post-2000 Northstar Anyone sells lower temperature thermostats? '04 Deville/ Head Gasket replacement cost? Oil pressure light on at idle - oil filter discussion Misfiring mystery help Rear main tool confusion... again Northstar NHP engines camcover gasket 2006 dts base C0561 P0107 P0520 P2431 Cam retainers- which way they go? engine swap and blletproofing 2001 aurora Timing Chain Tensioner Minor oil leak leads to $4,000.00 engine pull Engine Rebuild Question 2002 Deville AIR pump Vacuum line Routing Starter motor unreliable 1998 Deville base - O2 codes 40 Ft Lbs, 45 Horsepower from a tune - VIN Y Northstar, 97 Deville. Northstar engine, stuck water pump Intake manifold , unbelievable or not? how to change coolant in 2003 deville 2001 STS - P 0171/P 0174 lean mixture codes 2006 northstar whine/hum 1997 top ring gap 1999 Northstar cam gear alignment Convert 2000 VIN Y engine to VIN 9? 2005 Deville starting problem and its not the starter Heavy weight engine oil? 2008 Northstar timing chain sprocket 94' SLS t073 erratic idle & stalling 2004 Seville Front Motor Mount Replacement What is the difference between VIN 9 and VIN Y 4.6L Northstars ? Northstar lower crankcase torque? 2000 ESC Overheating - Any Guidance? 1997 SLS seems to run warm Midwest Cadillac Repair completes 618 Northstar 2004 STS MAF sensor Engine Shaking 04 northstar starting issues 2005 Northstar Knock on Start Up Correct Air Fuel Ratio? Dreaded Codes P0171, P0174 Wzup my fellow cadillac owners - 1999 Northstar head gaskets No More Cadillac's Throw Away Northstar Engine Seville 1999 spark plugs All DIC codes say "HISTORY" on rough running '97 Northstar 1999 STS - flexplate removal New member question 1997 Deville head gasket ? 2001 STS subframe bushings Barely running northstar-'99 STS 4.6L northstar transmission bellhousing bolts size 2002 Deville With Blown Head Gasket 1999 Deville engine cooling problems Huge thanks to Joe at Midwest Cadillac Repair Valve Cover Gasket replacement 2001 STS Proper Zinc Levels for your Flat Tappet Caddy Engine 2005 Deville engine ECU... seized oil drain plug - 2000 Deville 99 STS - Ran Into a Few Problems What year 4.6's are known for poor head bolts? Timing marks - 2005 Deville How to identify VIN 9 engine, out of car How I fixed my head gasket/overheating problems on my '99 Northstar 2001 DHS overheating and Knocking? Northstar wine NorthStar swap into Buick LaCrosse? New member - 1994 ETC Northstar Crack in oil pan. JB Weld? Seville 1999 - engine removal from top A quick 'thank you' So how much longer can I drive with the blown head gaskets? 4T80E Modification 96 Northstar Build 99 Eldorado/Looking for reccommendations for Las Vegas Mechanic - head bolts '04 Deville Engine Oil Leaks Northstar Performance on Performance TV who sells, other than the dealer: the head locator pins? 03522352 Keeping 1st gear with T/C off on the 96-99 Northstars - Tuning update Radiator hose temps - 2005 Deville Northstar ICM signals, not generated when cranking P1376, P0340, I'm desperate... Looking for an engine swap advice Northstar leaking/consuming lots of oil 2002 SLS Fuel Regulator, Vacuum or what? 2005 4.6l Y vin into a 2006 DTS Rear main seal install tool confusion Which HG repair is the best GM time sert,NS300L Insert or SureGrip Head Stud Kit Time Serts, Norm's, SureGrip Stud Kit?????? Kent-Moore VS Time-sert Oil pressure sensor too close to motor mount Seville 99, ignition cables routing Northstar flat tappet cam followers - which years? Water Pump Drive Pulley Removal Northstar Oil Usage Melted camshaft water pump drive pulley Suggestions for piston ring de-carb while heads are off during HG replacement. 4.6 Northstar - top overhaul 2005 sts northstar engine 98 deville p0741 p0171 p0174 Northstar coolant leak 4T80E Question... 2002 DHS blown head gasket removal without removing engine 1999 Deville 4.6 Base misfire code northstar turbo Main bearing bolt torquing. dry or oiled? I Need help were these brackets go Please Help with long cranking time Adding an Electric water Pump 95 Northstar
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