Question about 2001 Cadillac Sts

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Looking for shop to machine heads for head gasket repair northstar engine 1996 sts gloucester county NJ

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It is easier to find rebuilt heads and sometimes cheaper than finding a shop that grinds valves anymore. I just checked one of my sources for reman heads and this model comes with a hefty price of $650 plus the core charge.

Posted on Jul 13, 2009

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Head gasket repair cost


Well the head gasket set is around $130 depending on where you live. With the other parts needed to R&R the heads I would say $200 might do it. You would have a machine shop check the heads for damage which would be an additional fee.
A repair shop would add 25% or so for markup.

May 04, 2013 | 1996 Chevrolet Lumina Mini

3 Answers

How do you replace the head gasket


with great difficultry, It is verry time consuming end verry costly to have it (Replaced)

Nov 27, 2012 | 2000 Kia Sportage

2 Answers

Water in oil 4.6 northstar 99 deville


leaking or cracked cylinder heads. most likely has striped or broken head bolts. major engine repair will be needed. GM has had problems with older northstar engines.

Sep 15, 2011 | Cadillac DeVille Cars & Trucks

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My 1996 cadillac deville keeps running hot, I have changed the thermostat and had the cooling housing gasket changed but it still runs hot not all the time.


Do you have the Northstar engine? If so, there is an issue with head bolts pulling threads. Clues are periodic overheating. Look for exhaust in the cooling system. What happens is under load the compression gases push coolant out, and then you get overheat.
Pressure test the cooling system, there is a small hose that runs from the engine to the coolant tank, sometimes that plugs and air gets trapped. Some models suffer water pump impeller failure, easy to check with a special removal tool.
The head bolt issue is EXTREMELY expensive to fix correctly. Essentially you need to time-sert the bolt holes, and to do that you need to give a bare block to the machine shop.... Real bummer as the repair typically exceeds what is reasonable to invest in the vehicle, thereby rendering the vehicle useless.
I did repair mine, because I really liked the car.This issue should not happen.

Jun 05, 2011 | 1996 Cadillac DeVille

1 Answer

Im thinking about buying this 1996 cadillac for cheap but when you first start it theres a little noise the owner says it needs new spider geers is that expensive or is it a good buy


spider gear noise would only be heard while driving since they are part of the differential not motor if it has northstar engine be very careful they are known have head bolt failure resulting in blown head gaskets very pricey repair

Nov 03, 2010 | 1996 Cadillac DeVille

1 Answer

2002 cadillac sts,overheating missfire


hi, i sure hope you don't have this problem i'm going to describe to you, but you probably have a seeping head gasket. this would account for both of the conditions you speak of. the northstar 4.6 litre engine is an exellent engine, except for the fact that it uses an aluminum block with steel bolts to hold down the cylinder heads. after these vehicles run for many miles, the hot and cold operation of the engine causes the aluminum surrounding the head bolts to swell and contract and eventually will allow the head surface to warp, allowing coolant into the combustion chamber. you should take it to a shop and have a block test performed, this test uses a blue colored fluid which is sensative to combustion gases(hydro-carbons, carbon monoxide) and it will change color from blue to yellowish if the gases are present in the cooling system. but, if you have a constant misfire, chances are you will find coolant in the oil. check the dipstick and see if there is what looks like mocha coffee on it. this is the mixture of oil and coolant. if so, there is your sign of the problem. this repair is very expensive, so i hope you don't find this to be true.

Jun 25, 2010 | 2002 Cadillac Sts

1 Answer

Can the Head Gaskets be replaced on a 2001 Cadillac Seville STS Northstar without removing the engine? I am thinking about buying one that needs a head gasket replaced.


Yes , but it is very time consuming and if you have never replaced head gaskets before then I would not suggest that this vehicle be your first.

Aug 10, 2009 | 2001 Cadillac Seville

2 Answers

My STS ( 180000 miles) is overheating in traffic


Dude KravCar i seriously want to thank you for helping me fix my car!!@! i have a 1995 Oldsmobile Aurora Northstar 4.0 V8 and i came across your response to someone who was having an overheating problem with their Northstar Engine.....you commented for them to remove and inspect one of the purge lines to bleed out the air........ now after countless hours in my garage and wrongful diagnosis from a repair shop i finnaly have my engine running back fine after reading your response......thanx dude

Aug 06, 2009 | 1998 Cadillac Seville

1 Answer

I have a blow'n head gasket on my 99 Deville my question is would a 1999 northstar engine from a STS fit ?


It will work. You might have to change a few things but it will go in and hook up.

Apr 29, 2009 | 1999 Cadillac DeVille

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