Question about 2000 Cadillac Seville

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Overheatin problemS i have a cadillac sts 2000 and i just spend 3000 dollas to get fixed a head gasket problem my engine block was craked so i got a used block my meachanic used on the parts from my old engine and installed them in to the new block ive been driving my car and on hightway the temperature neddle stays in the niddle but when im driving on the city the temperture starts goin over the middle like half way n them goes back again and after ive been driving the car for a while it starts liking coolant over the top cap of the coollant tank and ive noticed too that the both fans shutdown and the go back on but they dont seen that they r blowing verytrong so dont know if there r suppost to be like that or what so please if anyone can help me out with this ill be very thankfull

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Your story sounds identical to mine except i have a 98 sts.I also went to have my head gaskets replaced and found out it was a cracked block,I had to buy a used motor.cost me $4,500.after driving the car for about two weeks,I noticed my temp go a little over and then back to the middle,but only in traffic situations.I had the mechanic replace the thermostat but that didnt help,i did find the purge line to be clogged,I cleared it and it seems to not happen as much.I did not have that problem again until yesterdayits possible it could be clogged again.When i check i will post my results

Posted on Oct 04, 2009

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You might have a fan motor relay problem.locate the fan motor relays and swap out both relays,if the problem continues then change out the thermostats.

Posted on Oct 02, 2009


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Im working on a 2000 chev venture 3.4 . On reading up on the problems . and it seems like it a water circlulaition problem . now heres the ? by removing the thermostat completely will the overheatin g...

Beside regulating the water flow to maintain correct coolant operating temperature part of the thermostat job is to restrict the flow through the radiator to allow the heat to be transferred to the cooling fins and to the air.. If the flow is too fast (no thermostat ) you will have boiling before you leave the drive way. If you have been doing work on the engine and have replaced the head gaskets it is common to place the gaskets on so that the air holes between the block and head are blocked by the gasket. If you have used after market gaskets then some do not have the necessary holes in the right places to allow the water to circulate around the head and the rear of the block

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Cadillac engine overheating

Head gaskets.Nortstar engines use soft metal aluminum block, so over time heat and pressure makes the head bolts pull from the block. Not a easy fix. Drive train must be removed, head bolt holes drilled out. Do a block test on it for exhaust in coolant. Repairs run from $2500-$5500. Gud luc

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Your Engine has a blown Head Gasket or a Head Gasket leak. The Head Gasket is a Gasket between your Cylinder Head and Engine Block. You will need to remove the Cylinder Head to replace the Gasket. If you decide to get it repaired, it is best to get a few estimates, or take it to your trusted Mechanic.

Aug 24, 2010 | 2000 Cadillac Catera

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Head gaskets are leaking,making the car overheat quickly,how easy and how much would a repair cost?

Its not easy and it is expensive. You have to remove the engine and once the heads are removed you have to rethread the headbolt holes in the block. It will cost about 3000-3500

Jul 10, 2010 | 2001 Cadillac Sts

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I Have a 1997 cadillac sts over heating problem

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Jul 02, 2010 | 2001 Cadillac Sts

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

White smoke coming out of the bottom of the engine and tail pipe fan off got fan to come on 92 sts cadillac sevill

Have a pressure test done on cooling system,may have crack in head or engine block, or head gasket leak.

Feb 11, 2010 | 1992 Cadillac Seville

1 Answer

My 2000 honda accord coupe keeps overheating and

i think that you might have either a bad head gasket or a cracked head,only way to tell is to remove the head and send it to a machine shop to get it magnafluxed.

Jan 28, 2010 | 2000 Honda Accord

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

1 Answer

My 1999 cadillac sts overheats alot i was told i have a cracked head but i think it is just the gasket how hard is it to change the gasket on this cadillac?

It hasn't been stated whether this is a Cadillac Seville STS, or an SLS. No matter, as they both use the 4.6 Liter, Dual Overhead Camshaft engine.

I would rate this as an 8, on a 1 to 10 scale. It would be a 10, if this Cadillac used wet sleeves. (Some Cadillac engines had a basic engine block, that had the water jackets open. The cylinders, are simply thick metal round tubes, with an O-ring at the bottom, and top. These set down in the block, and are held in place by the head.
There is a head gasket used also. When doing head work, or anything that involves removing the cylinder head, the wet sleeve cylinder, must NOT be disturbed from it's setting. If the cylinder is bumped, it can move, and the pattern the piston has made, will be disturbed. This means re-honing that cylinder. Lots of fun, these engines!)

Have you had experience with dual overhead camshaft engines? If yes, this is right up your alley. If not, be prepared for a small learning curve.

The engine must be removed. This is a transverse engine. The rear cylinder head May clear the firewall, it may not, if trying to remove it in the car. However, it is absolutely no fun trying to lay across the engine, and clean the gasket surfaces of the block!
This is just the tip of the iceberg, of bad things to come, when trying to replace the head in the car!

Just my advice.

May 18, 2009 | 1999 Cadillac Seville

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