Last post on Jun 21, 2011 at 10:46 AM
You are in the Cadillac DeVille
What is this discussion about?
Cadillac DeVille, Auto Repair, Oil, Sedan
#94 of 103 Re: 1999 Sedan Deville-Worth Fixing? [martian]
May 21, 2011 (12:43 am)
$1200 is way, way too much money for a Northstar water pump. The water pump is at the top, left side of the motor. It's rather easy to get to. I think there are a few things to take loose, but as I said, they are at the top of the motor and easy to reach.
The only thing different about it - it takes a special tool to remove the water pump. But it's like a $35 tool, just like a huge socket with tangs on it. The tangs slip into slots on the pump, and it turns out. IT HAS LEFT HAND THREADS!!!! It turns about 1/8 a turn, then the pump pulls out. There is a cover over the pump and it might take a new gasket. A wild guess would be about $75-$100 for the pump.
Take the car to and independent garage. As if they know how to take a Northstar water pump out and if they have the special tool needed. And then get an estimate for the job. $300 should be the max needed.
#95 of 103 Re: The Northstar V8 [2001dts]
May 21, 2011 (5:52 am)
I wonder if they make an after market radiator for the 2000-2005 model DeVilles. Brands like "Be Cool" etc. It would be nice, bc my Northstar generates tons of heat. I was told that by changing the antifreeze to newer, will cool it off. What do you guys think? Becauae honestly I haven't changed it in about 6-8 years. How long is the life of DeX-Cool? Does antifreeze break down, element wise or something?
#96 of 103 Re: The Northstar V8 [2001dts]
May 21, 2011 (2:04 pm)
For a long time Dexcool, or whatever the stock coolant is called, on a new car is about 100,000 miles or 5 years. If you've got 5 years on it, change it. And, yes parts of the coolant do break down, mainly the anti-rust and lubricating components.
Why are you lookin for a new radiator? If the old one doesn't leak, don't worry about it. I'm sure you can find a replacement radiator on the internet, I just don't know why. To get any serious cooling help, you would have to find a 'high performance' radiator that has addition rows, etc, etc. You Cadillac is a car where you would not find 'high performance' parts.
Change the coolant. If you can find a shop that will make a real attempt to flush out all the old coolant, on a 12 year old car with 8 years on the coolant, I would try to get as much of the coolant out as possible. Normally, at the 100,000/5yr, all the Cadallic service manual calls for is to dump the old coolant and add a 50/50 mix back. They don't say anything about flushing, and you will get only about 60% replaced. Since you've got so much time on it, I would try to get as much out as possible.
All car 'generate tons of heat'. The engineers think they have it under control.
A little hint. Run the AC all the time. When the AC is 'on', the fan/s run all the time. It tries to keep the temp around 195/200 degrees. If you push the 'Econ' button, this turns the AC off. The fans will not run until the coolant temp hits about 222degrees!!!!! I don't know why they designed it this way, but this is how it works. If something is wrong with the AC, and the cars computer can recognize it has a problem (low or high pressure in the AC system), it runs the car in Econ mode, not allowing the AC to turn on. And, it's going to run at higher temps. If the AC is not working, get it fixed and your Caddy will run cooler.
Your main problem is a head gasket. There is nothing, maintenance wise, you can do to help this. Of course, I am assuming you keep the coolant at the correct level and the oil at the correct level. If not, this abuse could cause all kinds of problems.
Drive a 1999 Cadillac and give it decent maintenance. If the headgasket blows, sell it for salvage. If any other significant thing breaks, how much the repair would take determines what to do with it. Wild guess, I would think the best cared for 1999 Cad would be about a $3,000 maximum trade allowance. If something breaks that will cost $1,000 to fix, sell the car for salvage.
You should try to find an independent shop, with a good reputation, that can work on the car. If something does need to be repair, the cost should be half or less than a CAddy dealer will want.
Oh, wait, you have a 2001 Cadillac. It's worth about $5,000.
#97 of 103 Resetting "change oil soon monitor"
Jun 20, 2011 (4:21 pm)
1993 Deville with 4.9L. How do you reset the "change oil soon" monitor so it doesn't come on every time you start the car. No manual.
Also wondering why it would come on after only 2500 miles.
#98 of 103 Re: Resetting "change oil soon monitor" [oldfarmer50]
Jun 20, 2011 (9:03 pm)
Cadillac DeVille, Fleetwood, 1991 -93
When “CHANGE OIL SOON” light is illuminated, press and hold Range (A) and Reset (B) buttons on Fuel Data center 5 to 60 seconds. When buttons are released, the light will flash four times if it has been reset. If the light comes back on for more than 5 seconds, repeat procedure.
Oldfarmer, google is your friend.
#99 of 103 Re: Resetting "change oil soon monitor" [oldfarmer50]
Jun 21, 2011 (6:54 am)
The caddys never lie! 2500 miles is about right for regular motor oil, some people say 3000. I use Mobile Clean/Super 5000 10w30 with a Lucas mix!! My model caddy has an oil percentage life. On mobile I may go 5500 miles, depends on my bank! But yeah that sounds normal and quit good if you ask me! 2500 miles is at about normal range! As for the monitor, go to the information center on the dash, scroll until you see oil life and just reset it...
#100 of 103 Re: The Northstar V8 [2001dts]
Jun 21, 2011 (7:54 am)
I worked at a Cadillac dealer back when the Northstar first came out in the early 90,s.I have seen spark plugs go bad and break down on acceleration causing random engine miss when they had less than 2000 miles,sometimes a certain plug may break down long enough to set a misfire code if it was 96 or newer,but 93-95 Northstars will not set codes,i just replacced all plugs and never had a single one comeback for that problem.Note-as they get older the plug wires can also go bad causing same problem,if so replace all the wires not just the one bad.
#101 of 103 Re: The Northstar V8 [bolivar]
Jun 21, 2011 (8:07 am)
That,s not true about a not leaking radiator,i had 3 cars-89 and 96 Cadillac,86 Jaguar XJS-V12,all 3 was getting hot,radiators don,t leak a drop but the cores were restricted not letting coolant flow properly,monitored temps on cadillacs before=115-120 C,Jag had gage going right before the H mark,after i changed radiators the Cadillacs ran at 90-104C,Jag gage never went over 1/2 even in desert over 100 degrees
#102 of 103 Re: Resetting "change oil soon monitor" [bolivar]
Jun 21, 2011 (10:41 am)
"...Oldfarmer, google is your friend..."
You're my friend too. Who needs that Google guy?
#103 of 103 Re: Resetting "change oil soon monitor" [2001dts]
Jun 21, 2011 (10:46 am)
"...2500 miles is about right..."
Holy cow! Even back in the 60s we only changed every 3000 miles. These days people tell you you're crazy to do it that often.
What is going on in that Caddy motor to require such frequent changes?