Question about 1997 Cadillac DeVille

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1998 cadillac deville coolant system diagram - 1997 Cadillac DeVille

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6ya6ya
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Posted on Jan 02, 2017

  • 109 Answers

SOURCE: 1998 cadillac deville

try taking off your fuse panel cover, there should be a reset button in there.

Posted on May 06, 2009

ftw1952
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SOURCE: How do I add coolant to my 1998 Cadillac DeVille?

the coolant reservoir has a black cap with an orange label affixed to it.. Unscrew it many times to remove & fill about 3/4 ways up

Posted on Jan 30, 2010

Testimonial: "Thanks for the help....."

  • 3 Answers

SOURCE: Where is the 1998 Cadillac Deville Coolant Drain

on the radiator on the drivers side bottom, there is a pedcock vavle

Posted on Mar 08, 2009

  • 1 Answer

SOURCE: location of coolant temp sensor

where can locate the engine coolant temperture sensor.

Posted on Jul 29, 2009

  • 97 Answers

SOURCE: 2001 cadillac deville, overheats without loss of coolant

First, provided their are no visible coolant leaks and/or loss of coolant with no signs of leaks, I would thoroughly flush cooling system and replace coolant, then check and/or replace thermostat (you can place thermostat in boiling water to check for proper function), if you have tried these 2 steps and still are experiencing overheating you may need to replace your water pump which can be a tricky job if you're unfamiliar and try to do it yourself, however, I could walk you through it if necessary. Also visually check your radiator hoses for bulges, wear ,etc along with heater hoses etc. You may want to also check radiator fins to see if they are dirty/obstructed and clean if necessary. Let me know if I can assist you further and how it works out

Posted on Aug 30, 2009

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1 Answer

PICTURE OF PURGE LINE DIAGRAM FORTHE COOLANT SYSTEM OF A 2001 CADILLAC DEVILLE DHS ENGINE


There are a lot of coolant lines around the Northstar engine, but not one called a "purge line" that I am aware of. The coolant system is designed to be a closed system, and is never purged.

However, there is a rubber drain line on the pressurized overflow tank that will release coolant on excessive pressure sensed by the rad cap on the tank, or if the rad cap is faulty. If the system has a leak anywhere, it will not hold required pressure and that will always cause overheating. If you are losing coolant, that is the first place to look (bad rad cap, or cracked tank or line from the tank to the rad).

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It is more likely that your alternator has failed. Have your alternator tested and replace as necessary.

May 12, 2014 | 1998 Cadillac DeVille

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The fans /fans are turned on by the pcm, using input from the coolant temp sensor, as well as the HVAC system. The cts is on the right rear of the engine below the egr valve.

Sep 24, 2011 | 1998 Cadillac DeVille

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Coolant resivior


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Here the replacement part: 1998 Cadillac DeVille Coolant Reservoir - Partstrain.comLet me know if you need anything else.

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Mar 04, 2011 | 1998 Cadillac DeVille

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1998 CADILLACE 4 DOOR SEDAN DEVILLE IS OVER HEATING TEMP GOES UP TO 230 REPLACED THERMOSTAT


  • Add a mixture of one-half water and one-half antifreeze to the radiator. Fill it right up to the top.

  • 2

    Fill the overflow/coolant reservoir with the same 50/50 mixture.

  • 3

    Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.

  • 4

    Keep an eye on the temperature gauge throughout this process.

  • 5

    Refill the radiator to the top and coolant reservoir as needed.

  • 6

    Put the radiator cap back on.


  • You might have some air inside coolant system, try follow the steps that i just created. if its not work out please relay me back thanks

    Feb 11, 2011 | 1998 Cadillac DeVille

    1 Answer

    How do I add coolant to my 1998 Cadillac DeVille?


    the coolant reservoir has a black cap with an orange label affixed to it.. Unscrew it many times to remove & fill about 3/4 ways up

    Jan 30, 2010 | 1998 Cadillac DeVille

    1 Answer

    1998 cadillac deville looses about 1/2 collant every two to three weeks no coolant in the oil or on the ground


    Check for possible leak. Also check the radiator cap. Inspect the rubber seal for signs of deterioration. Look for signs where coolant had been escaping which would have coolant stains on them.

    Nov 23, 2009 | 1998 Cadillac DeVille

    2 Answers

    Location of coolant temp sensor


    where can locate the engine coolant temperture sensor.

    Jun 20, 2009 | 1998 Cadillac DeVille

    1 Answer

    1998 cadillac deville


    try taking off your fuse panel cover, there should be a reset button in there.

    May 06, 2009 | 1998 Cadillac DeVille

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