Question about 1996 Cadillac Seville CA Value

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1996 cadillac sts overheating no apperant reason, new radiator cap, new hoses, new radiator etc

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Same problem with my 96 cadillac, don't be a fool like me, or anybodyelse and replace things such as RADIATOR, THERMOSTAT, WATER PUMP, HEATER CORE, HOSES, RADIATOR CAPS, RADIATOR FANS, And don't waste all of your money on coolant like i did. It is either Head Gasket, or Head Bolts pulled. I have replaced everything above and more, and still overheats, just as other people said and told me HEAD GASKET and i did not listen, now i wasted all of my money on stuff that did not need to be replaced. I'm sure you have a Northstar? Like me? One of the worst engines ever built in my book. Sell it quick if you do not have the money to fix it with, which is very costly. Or get a 4.9 which is more stable.

Posted on Aug 12, 2009

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Sounds like it could be one of the head gaskets. does coolant belch out if you hit the gas pedel like if you were going to pass someone on the hiway. if it does, exhaust gases are presurizing the cooling system beyond the max. presure of the cap...

Posted on Apr 09, 2010

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Hi,
You didn't mention, but did you replace the thermostat? If not, please do. It's inexpensive and easy enough to do.
Hope this helps... Good luck!

Posted on Aug 28, 2009

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The head bolts tend to pull out of the block, a GM design flaw. Engine replacement is the only solution.

Posted on Jul 17, 2009

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Check your thermostat

Posted on Jul 11, 2009

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Possible thermostat. Try removing it and see if your car runs cooler and stops overheating. If you don't know where it is, its easy. follow the top thick hose from radiator to where it meets engine. thats where it is. just undo hose at engine, (when cold of coarse) and just use a screw driver and lightly pry it out (very simple) and then just reattach hose. I think the car runs better this way, some mechanics disagree. only prob is in winter time your car engine won't heat up enough to allow heater to work. I live in Arizona so its not an issue for me.

Posted on Jun 24, 2009

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1 Answer

I have a 1998 cadillac Seville sts it is overheating and leaking coolant.


That could be

- faulty thermostat
- faulty radiator fan drive
- leaky head gasket
- collapsed radiator hose
- sludged up radiator

If unsure how to check these things, see a mechanic. You can get a mobile mech to come to you.
.

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My 1996 Cadillac fleetwood brougham had a leacing radiator so I changed it and now it wont stop overheating any tips?


Hi,

Assuming you replaced the radiator with new or refurbished. You probably need to replace the thermostat. It is usually located on the engine block in a housing at the end of the top radiator hose. Probably just two bolts in the thermostat housing.

Good Luck,
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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

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My 1995 cadillac seville sts is over heating i flushed system put in new radiator new cap new thermostat new hoses new pump new fluid there is no leaks i dont understand


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.

Jun 14, 2010 | 1998 Cadillac DeVille

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My Cadillac 2000 Seville STS having overheating problems after installing a new radiator, 2 new thermostats, new water pump and a new solvent that suppose to plug any leaks, no smoke out of exhaust pipes,...


Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,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.

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I have a 1996 Acura 3.2TL[V6] and it is overheating...


I had the same problem, whole new radiator, new hoses, new thermostat, and still overheating. What the problem was for me...bad radiator cap...all that money and a $20 fix...try it?

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99 seville sts overheating


do you have the 4.9 in it they are pron for there heads cracking with out you knowing or any smoke coming out you tail pipe.

Sep 05, 2009 | 2001 Cadillac Sts

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My 1998 STS is still overheating after replacing the thermostat. The fans work. The radiator is clear. I have no reason to think the water pump is not working. I have a new temp sensor, but have not...


Did you try replacing the radiator cap? Most over looked problem I have seen, and does the hose to the overflow tank leak? Do you have antifreeze in it? Look inside the radiator while the car is running if the water is moving then the pump is ok if not then the pump may be bad. I have seen water pump shafts break and the impeller not turn and show no other symptoms but when removed found the shaft broke.

Jul 02, 2009 | 2002 Cadillac Sts

2 Answers

1999 sts cadillac oveheating


With the engine cold remove the radiator cap, then put it back on (just to make sure there is no pressure in the system) start the engine and let it run for about 30 seconds. Go back and take off the radiator cap. If there is air escaping you know there is a head gasket leak, it shouldn't build pressure that fast, and it could be causing the overheating by allowing air to be forced into the cooling system

Dec 29, 2008 | 1997 Cadillac Seville

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