Question about 1997 Cadillac Eldorado

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The cooling system in my 1997 cadillac Eldorado keeps overheating; seems like it has too much pressure in it because it keeps blowing hoses off or all the coolant is forced out of the overflow once it gets hot. Temperature gauge reads normal at idle or slow speed, but overheats after I get up to 50mph or so. I have replaced radiator and thermostat, but problem persists.

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This sounds like a blown head gasket. You can purchase a kit that when used per the instructions you will know for sure

that it is a blown head gasket. You might try some of the sealers that are on the market but I do not back any of these half way fixes. I was a professional Cadilliac Technician for over 30 years. FIX IT RIGHT THE FIRST TIME

Posted on Sep 01, 2010

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1 Answer

How do i replace my thermostat on 1998 eldorado


  1. Install the thermostat.
  2. Install the thermostat housing using a new gasket.
  3. Install the thermostat housing bolts. Tighten the thermostat housing bolts to 89 INCH lbs. (10 N.m).
  4. Connect the radiator hose.
  5. Install the air cleaner outlet duct.
  6. Refill the coolant.
  7. Start the engine.
  8. Check for leaks.

Apr 22, 2012 | 1998 Cadillac Eldorado

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My 1986 Cadillac Eldorado is leaking coolant, what are the possible reasons for this


Possible leaks are the hoses, the radiator, the water pump, thermostat gasket, and if you smell coolant inside maybe the heater core is leaking.

Jan 06, 2011 | 1986 Cadillac Eldorado

1 Answer

Problem overheating please help


I would do a pressure test on the cooling system to see if you might have a blown head gasket, causing pressure to build up in the cooling system. You probably have tried a lower pressure radiator cap?

May 13, 2010 | 1993 Cadillac Eldorado

4 Answers

My 1997 cadillac eldorado overheats plugs, thermostat, water pump, intake value have been replaced and still over heats.


Make sure the air in the cooling system is bled out,and make sure the cooling fans are coming on,and going off on there own.If they come on,they have to go off too,when it cools down.If the cooling fans do not come on,bled the cooling system,and replace the coolant sensor,this tells the computer to activate the cooling fan relays.Also check the fuse,and the cooling fan relay.

Apr 14, 2010 | 1997 Cadillac Eldorado

1 Answer

97 cadillac eldorado overflowing through overflow pipe


The most common overheating problem with the Northstar engine is a blocked purge line. It's job is 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 11, 2010 | 1987 Cadillac Eldorado

4 Answers

1997 cadillac eldorado running hot


Make sure you put in the correct temp thermostat. GM usually has 2. A low temp and a high temp. Most shops will give ya the high temp just because thats usually what the book calls for. you might want to try a low temp. Also, sometimes, when a car runs hot and everything has been repaired....well, almost everything......it might be the head gaskets. And those my friend are no easy task. But..somewhere to start. have your cooling system pressure tested. Only way to really know for sure. Oh..also make sure your fan is working!!!! You might have a faulty fan switch.

Jun 19, 2009 | 1997 Cadillac Eldorado

1 Answer

1993 Cadillac Eldorado overheating


I am assuming you have the Northstar engine.

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.

Are you running it without a thermostat? If so,then strangely enough,this will cause overheating as the Northstar cooling system is different to most conventional systems and therefore will not help you diagnose the problem.

May 29, 2009 | 1993 Cadillac Eldorado

1 Answer

1997 eldorado still runs hot


Are you sure it's not air locked? Run it with the rad cap off and keep watching the water level. It might go up and down and then finally drop. Maybe even try letting some air out of one of your heater hoses if you can.

May 06, 2009 | 1997 Cadillac Eldorado

1 Answer

Overheating


Many items need assessment. First what is THE COOLANT LEVEL enine running from cold start. IF LOW . Is there a coolant leak and where ? Lets say all of the previous check OK. ARE THE COOLING FANS OPERATING ? . They are , GREAT. Is it possible the cooling system ( i.e. radiator ) is clogged internally, or blocked exterior cooling fins of the radiator restricting cooling air. Hope this helps.

Apr 16, 2009 | 1993 Cadillac Eldorado

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