Question about 1997 Cadillac Eldorado

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Northstar coolant flow

Does this really suck the coolant from bottom radiator hose with a thermostat in the way?

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  • Cadillac Master
  • 76,846 Answers

Don't understand what you are asking here. please clarify

Posted on Apr 19, 2013

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Posted on Jan 02, 2017

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duane_wong
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SOURCE: no heat on my 98 caddy deville delegance?

The heater core may be clogged up. Or the blend door isn't functioning correctly.

Posted on Sep 20, 2010

  • 11 Answers

SOURCE: replaced water pump. thermostat. radiator, filled

Try backflushing,if this doesn't solve the problem,..then it could be the distributor,they can make the car run hot if the are going out.

Posted on Apr 13, 2009

  • 60 Answers

SOURCE: northstar engine overheating

Have you checked the head gasket? Common overheating problem.

Posted on Aug 14, 2009

  • 7353 Answers

SOURCE: 1997 cadillac deville coolant fan

with the a/c on, the fan should be on. crank it up, turn a/c on, now take a hammer and gently tap on the coolant fan, if it comes on, or attempt to spin, its bad.

Posted on Oct 19, 2009

Auto Master
  • 139 Answers

SOURCE: just replaced thermostat and coolant car is over

Hello,
The cooling system is designed to opperate at 220 to 225 deg farenheight. it sounds like it is doing fine. The fan will come on at about 220.

I hope this helps,
Roy

Posted on Dec 01, 2009

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1 Answer

HOW DO i REPLACE THERMOSTAT 1997 CADILLAC DEVILLE?


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.
If you still wish to replace the stat...
The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems), the hose connects into the housing where you will also find the water pump.

You will need to remove the air filter housing and air duct to gain easy access to the thermostat.

Remove the hose from the housing,then remove the two bolts on the flange,the thermostat can then be pulled out.

Take note of the orientation of the thermostat as you remove it.

The thermostat in the Northstar engine is a dual action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).
Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.

Feb 14, 2015 | 1997 Cadillac DeVille

1 Answer

Suburban overheats while driving but cools while stopped. Heat works very good


the flushing of the radiator did nothing as it only cleans out the already open cores but the blocked cores are still blocked. Fit a new radiator and possibly the bottom radiator hose as it may be sucking in as well restricting the flow of coolant from a partially blocked radiator cores.

Jan 13, 2014 | Cars & Trucks

1 Answer

My 1989 dodge pickup only overheats going down highwa y just recently started i have replaced water pump,the thermostat and the radiator cap.i have even removed the thermostat and still building press


put the thermostat back in the right way . Check and replace the bottom radiator hose if it feels soft when cool. Old soft hoses will suck together at speed and slow down the coolant circulation. Have a flow test done on the radiator cores for partially blocked radiator.

Dec 19, 2013 | 1989 Dodge Ram D-Series Pickups

2 Answers

Isuzu axiom overheat


first make sure the fuse is not blown for the fan, if anybody has ever tried to repair it before make sure the wiring is not backwards making the fan run backwards, try a coolant flush.

Jan 18, 2013 | 2002 Isuzu Axiom

1 Answer

I have replaced the the Thermostat on my Chrysler 300 with the 5.7 Hemi Engine. It still over heats. Is there more than one thermostat on thi engine?


You didn't state when it overheats, if it is while driving the fault can be : belt driving water pump slipping , lower radiator hose collapsing, most common is clogged radiator. Start the engine with the radiator cap off when it is COLD and observe the flow in side. If you see really fast flow of coolant you have the bottom portion of the radiator stopped up. The only way to know is to remove the radiator and have it flow tested.
A blown head gasket or cracked head will cause steam to come out of the exhaust, water in the oil (milky). If it is running hot while idling , check fan to see if it is turning as it should when it should. Older cars have fan clutches that go bad, newer ones have temp thermostats that go bad.

Apr 30, 2017 | Chrysler 300 Cars & Trucks

2 Answers

I have a 1999 Cadilac Deville that I replaced a


Are you sure the thermostat was in the wrong way ?.

The thermostat is located in the bottom hose unlike most conventional cooling systems.

The thermostat in the Northstar engine is a dual action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).

Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.

For overheating problems consider the following......

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 30, 2010 | 1999 Cadillac DeVille

2 Answers

My car overheats quick is a cadilac 97 ceville


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 to near the thermostat housing,the blockage may be there.

Apr 20, 2010 | 1997 Cadillac DeVille

3 Answers

98 Cadillac Northstar motor running hot in 30 min.


The normal operating temperature for the Northstar engine is around 210 degrees.
The fans will not come on until the temp hits 225 degrees.

The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems).

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 to near the thermostat housing,the blockage may be there.

If the other end of your purge line is not connected to anything then that is the problem......it must be reconnected otherwise the cooling system is not pressurized.

Apr 19, 2010 | 1998 Cadillac DeVille

1 Answer

Need to locate where my 2001 cadillac deville thermostat Car is not overheating but is running hot not all the time I want to change my thermostat


The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems), the hose connects into the housing where you will also find the water pump.

You will need to remove the air filter housing and air duct to gain easy access to the thermostat.

Remove the hose from the housing,then remove the two bolts on the flange,the thermostat can then be pulled out.

Take note of the orientation of the thermostat as you remove it.

The thermostat in the Northstar engine is a duel action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).
Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.

Don't forget the new gasket when you install your new stat, you may have to order this separately.


Overheating........

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.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.


Nov 05, 2009 | 2001 Cadillac DeVille

2 Answers

1996 cadillac deville overheat..radiator?


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.

Aug 20, 2009 | 1996 Cadillac DeVille

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