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Sedans Cadillac DeVille 97 Deville Idle and Coolant
20 messages, Last post on Dec 27, 2008 at 6:56 PM
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For the last year I have had problems with my coolant, always having to put it in. Almost a year ago I had a new radiator put in and that seemed to of solved the issue, recently my light to "check coolant level" has popped up. My other issue within the last week is my service engine soon light has came on and off and my car has been idling rough when I come to a light and whatnot. Today the SES light was flashing on and off and car is still idling. PLEASE help me if you have any advice. Thnaks! Erica
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Replying to: ubamel (Mar 18, 2008 9:55 am) If so, you possibly have a bad head gasket. Which is a known problem with Cadillac Northstar motors. And, is very expensive to repair. Of course, you might just have another simple leak of coolant somewhere. You can 'pull the codes' yourself on your Cadillac. You can put the instrument panel into a 'diagnoistic' mode and it will display the error code/s that is causing the check engine light to flash. There are other online sites where you can get a 'basic' definition of what the error codes mean. Or, many auto parts houses will hook up a 'scanner' and 'pull the codes' for no charge, and give you the basic descriptions for the codes. If you want to attempt to pull the codes yourself, reply here and I will post a link to a site which has the instructions. Cadillacs are great cars, until they break. Then they can be complex and expensive to repair. |
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Ok, I have pasted in below the procedure to enter diagnoistic mode for your Cadillac. Get a pencil and paper read and write down all the codes, especially any 'Current' codes. The "History" code probably can be ignored. There are a lot of things displayed, and you might have several codes. The codes will have the prefix shown in the last paragraph below, plus a 4-digit number. Post any of the 'currect' codes back here, and I will try to look them up for you. But, as I said in the first message, it is very important to know if your car is overheating!!!! bolivar HOW TO “ENTER” DIAGNOSTIC MODE To enter diagnostic mode, proceed as follows: 1.Turn ignition “ON.” Engine can be either OFF or RUNNING. For cars equipped with the Digital Instrument Panel Display (Digital IPC): 2.Simultaneously press the “OFF and “WARMER” (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated For cars equipped with the Analog Instrument Panel Display (Analog IPC): 3.Simultaneously press on the Climate Control Panel (CCP) the “OFF” and “PASS WARMER” (up arrow) button. After the segment display test, the driver message center displays all set DTC, current and history, in the following order: A. PCM DTC Power Control Module (?) B. IPC DTC Instrument Panel Control C. ACM DTC Air Conditioning D. SDM DTC Air Bags E. TCS DTC Traction Control System F. PZM DTC Body Control Module G. IRC DTC H. RFA DTC Radio I. CCP DTC Cell Phone J. MSM DTC K. MMM DTC Memory Control (The “Set 1, 2” Panel on Arm rest.) L. PHN DTC The RSS, CCP, MSM, MMM and PHN DTC’s appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display. On the OBD II cars) the prefixes you’ll see are: “IP” for the IPC instrument panel; “AC” for air conditioning module; “TC” for traction control; “RS” for the road suspension system; “SD” for the air bags; “PZ” for the body control module~ “CC” for the cell phone; “RF” for the integrated radio system. |
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My 2000 DeVille (64,000 miles) supposedly overheated (no indication). At 57,000 miles "check coolant" message displayed. It was taken to the dealer who replaced the water pump, thermostat, etc. The newly replaced water pump (after 7,000 miles) supposedly malfunctioned and caused the engine to overheat blowing the head gaskets (again no guage indication). Could this be related to the GM Dex-Cool problem reported in Missouri and Canadian class action lawsuits (www.modexcool.com) relative to the use of Dex-Cool coolant and gasket failure? GM settled this lawsuit in March 2008. Anyone having a similar problem and related information?
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Replying to: firstlast1 (Apr 01, 2008 5:23 pm) I sure don't understand your 'no indication' of an overheating situation. If a Northstar overheats, you will see it on the guage, there should be DIC messages, and you will get large amounts of coolant blown out of the surge tank. Northstars blow head gaskets. This is a well known problem. And the water pump does not have to be failing for this to happen. It is a design problem, the gaskets fails, allowing combustion gas to get into the coolant passages, causing overheating. |
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I'm hearing different opinions. What is normal operating temp. for a 1997 Cadillac Deville with 4.6 Northstar motor? How expensive is it to repair head gaskets on these motors? Mine seems to run hot. Between 196 and 220 degrees. It can go higher if I run it harder. The radiator uses about a half gallon of coolant for 30 miles but I see no leaks. Dipstick is not milky and no coolant smell or in tailpipe. I do see what looks like white exhaust when idling (especially in the mornings) but not when accelerating. I don't know however if it's smoke or just that it's kind of cold in the mornings. Can anyone help shed some light for me? Tanks in advance. sspeis
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Replying to: sspeis (Apr 09, 2008 11:43 am) But, you other symptoms point to the early stages of a blown gasket - just not blown severely yet. If the coolant is not leaking, the only place it can be going is into the engine. A half gallon per 30 miles is a lot of coolant going somewhere. Northstars bad head gaskets do not put coolant into the oil. It goes into the combustion chamber. And, combustion gas goes into the coolant, causing overheating. Massive overheating as the gasket gets worse. And the higher temps when running hard is a usual symptom. If you drive up a steep hill, it will also overheat - basically the more you load the motor, the more it will overheat. My guess - you've got a head gasket problem. It will get worse. No kind of 'Stop Leak' will seal it. Repair will be $3,000 or more. The motor must be pulled. Heads removed. All 20 head bolt holes bored out. Then rethreaded. Then a special insert called a Timesert is screwed in. The motor is then reassembled, with new headbolts screwing into the Timesert inserts. New gaskets of course. Most of the cost is labor because the motor must be pulled, the rear head cannot be worked on in the car. This is about 50% of what a 97 Deville is worth. There are a lot of Cadillacs scrapped because of a blown headgasket, and what the cost of repair is. But, if a Timesert operation is done, this usually fixes the headgasket for the remaining life of the car.
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Replying to: bolivar (Apr 09, 2008 9:16 pm)
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Replying to: donjuan3 (Jun 25, 2008 9:26 am) Where else? Google is your friend. |
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Passenger side mirror unfortunately broke when it scraped against garage siding. It is still functioning. The assembly is still attached due to the electrical wirings. Replacement plus labor quoted at approx $800. Any do-it-yourself suggestions / advice on remedying this situation? Thanks.
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