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demetrice mac Posted on Nov 19, 2017
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Running hot and heat don't work

Run hot losing coolant but dont know how i dont see it leaking out anywhere but i have to put coolant in it everyday it makes a swishing boiling sound when it get hot and i changed the thermostat and now the heat still dont work it still run hot but wen i stop its a tapping sound but when i drive it stop looking for a solution

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NOEL

NOEL

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  • Cadillac Master 8,606 Answers
  • Posted on Nov 19, 2017
NOEL
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5 Related Answers

Anonymous

  • 607 Answers
  • Posted on Mar 27, 2009

SOURCE: leaking coolant, oil, poorly running, won't shift into gears now

First determine where coolant loss comes from. I would not continue driving, till that step is isolated, or further damage will be done

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Anonymous

  • 4669 Answers
  • Posted on May 15, 2009

SOURCE: 98 deville runs hot. i have already changed thermostat

You likely don't want to hear this but Northstar engine a common for head gasket failures. One good test that I use it to fill the coolant tank all the way to the top. Then start it up. If the coolant shoots out of the tank. The heads have a problem.

grimm_army

  • 43 Answers
  • Posted on Jun 19, 2009

SOURCE: 1997 cadillac eldorado running hot

Sometimes a vacuume leak can cause overheating problems too.

Anonymous

  • 651 Answers
  • Posted on Aug 09, 2009

SOURCE: My northstar coolant hot light comes on no fluid leaks but looses

change the thermostat.

duane_wong

Duane Wong

  • 6826 Answers
  • Posted on Jan 02, 2011

SOURCE: my 2000 cadillac deville keep running hot when i

OK, check that the 2 fans are turning on when it gets to operating temperature. If not, replace the 3 or so relays that control the two speed fans on your car.If that doesn't solve the problem, then you may have to buy new fan motors and also have the harness replaced if necessary to make it cool reliably.

I had this problem on a 1997 Cadillac Deville Limousine that overheated over 157 deg. F and went into its limp mode for cooling the engine off by allowing 1/2 of the cylinders to circulate fresh air into the engine in case all antifreeze would leak out or the car would overheat.

Don't run the Northstar engine too long, more than 45 min. at a time in this limp mode.

Good luck on this repair of your Northstar Engine.

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Loosing coolant
the test is easy
it uses the magic of the system has 12 to 14PSI pressure all the time.
hot. so park it get it hot. to 180F (old thermostats fail, they are #1 failure ,so why would you discount that?????)
ok its really hot , my pryo gun shows 180F ,ok real hot is true. no bs.
so now look for leaks.
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and the passenger toes are dry (heater core drips)
then there are on external leaks,
if true that, then its INTERNAL LEAKS!

head gasket is failing or the A/T or engine oil pan is full of AF.
are you running 50%^ AF all the time, ?????

everywhere you drive do you look after parking, for ground leaks.?
as you leave car and when you come back.
you must. or miss the boat.
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There is a leaking in a tube which carries coolant to the radiator. I want to know, could I run the van for 30km without coolant everyday for a week till I repaired it , because even if I filled the...
u need to either patch or fix the leak if u run without coolant u will blow up the motor
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