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  • Car Model and Year
    Devilles & Dts
  • Engine
    Northstar 4.6L V8 (LD8/L37)

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    Harleys, Cadillacs, loud electric guitars

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bigtone's Achievements


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  1. I removed and replaced these when I did head gaskets in the car. There was just barely enough room. Also you can cheat a little by pulling forward on the engine lifting lug (with the stabilizer removed) with a comealong, just only pull enough within the 'give' of the motor mounts to avoid damaging them. What I did was pull the engine forward by hand and then use the comealong to hold it there.
  2. What issues did your early 2000 Devilles have? I bought a 2005 Deville 3 years ago with 39,000 miles on it and it has been trouble free so far. All 4 had the plenum go. Easy fix. 2 of them had the actuator under the dash go. 2 had the lockup solenoid go. 2 had the rear shocks go. (Funny, the lowest mileage one, the 02 Deville with 44k had the rear shocks and front sway bushings go. Bad roads I guess. Plus, the ps pump went bad). 2 had the subwoofer give out. 2 (possibly 3, I think also the 02 after I traded it in) had to have the ac compressors replaced. Only one, my son's 01 Deville, had the head gasket go. All of them except the 02 had windows drop. )5 had the alternator fail. There may be a few othing things that I may have forgotten. I recently traded in my 05 Mary Kay for the 06 DTS lux 3 that I drive now. A year ago we traded the 02 for a 2010 DTS Lux for my wife. I will most likely be selling my 01 Deville, no use for it, but a great running and looking car. If I had more room in my driveway I could just keep it. So as far as 2000-05's that will leave just my son's 01 Deville, and he loves the car. I don't think he will get rid of it soon. This sounds like alot of problems, but this is 4 cars that we used dailey and put a decent amount of miles on them. I am in no way complaining. I am a bit of a perfectionist, as soon as I see something is wrong (with caddies or my bikes) I have a habit of jumping right in to fix them myself.
  3. I realize that it has been a month, but at any rate the 'open L1' I believe indicates an open circuit to the alternator from the PCM. The PCM controls the field to the alternator. A new alternator will not fix that, it may in the wiring from the PCM to the alternator.
  4. What issues did your early 2000 Devilles have? I bought a 2005 Deville 3 years ago with 39,000 miles on it and it has been trouble free so far. They all had the torn plenum issue, the mode door actuator, they all went thru oil, both 01's had the lockup solenoid failure, and one of the 01's had a head gasket failure. I have an 05 Deville also and it had a torn plenum when I bought it. And a bad alternator. Even with these issues, these are great cars. To me, they are like Harleys, they all have about the same problems. if you can fix one, you can fix all of them.
  5. That sounds like a twin to the 2010 DTS Lux that I bought last January. I have a few early 2000 ish Devilles, and it seems most of the issues with those cars were straightened out with the new body style. One thing, if this car is from a Cadillac dealer, ask them to make it a Certified Used. This extends the Bumper to bumper warranty to 6 years, 100k miles. My 2010 is Certified Used, and that cinched the deal for me.
  6. I think most of the typical Cadillac problems were related to age, not miles. A few years ago I bought a clean one owner 02 Deville with only 44k miles. I knew it needed a few things before I bought it. I ended up replacing the rear shocks, plenum, mode actuator, steering column and a few other things that I had just recently replaced on the 2 2001 Devilles that we had, and they had in excess of 120k miles. After I traded the 02 in on the 2010 DTS we now have, the guy who bought the 02 said the ac compressor started failing, just like on our 01's . So even though the 02 had less than half the miles of the 01's, it was following right behind them in component failures, according to my unscientific research.
  7. I agree with the above. If you put your hands on the evaporator inlet and outlet piping, they should feel close to the same temp. If the outlet feels warm compared to the inlet, you are slightly low on freon, probably not low enough to throw a code yet.
  8. I had to run a wire thru the firewall on my 01 Deville for the hood tamper switch for the remote start. I cut a very small slit in the rubber boot surrounding the steering column where it penetrates the firewall, and slid the wire thru there.
  9. Actually they changed the headbolts sometime during the model year. On the other Caddy forum, a GM parts guy named Rippy (great guy) posted some info as to how to tell what headbolt pitch you may have in an 04.
  10. I am aware that one would think that the pressures reverse themselves, with the coolant being higher after a hot shutdown. I read where a guy on the other forum stated that when he popped the quick disconnect off the rad for the trans cooling line there was residual pressure there, indicating there may be a check valve inside the trans that locks in the pressure after the engine is shutdown, although I haven't had time to look in the transmission drawings to confirm this. If I was designing a heat transfer system, that is what I would do, but GM, who knows?
  11. Correct, although the pressures are more favorable for trans fluid into the coolant. The coolant does appear to be reddish. The trans fluid does not look bad. It is vented, so small amount of coolant that may be getting into the trans may be boiling out. At this point it is just a theory, until I get the time to take it apart. But, my point was I'm glad I did not jump right on another h/g repair, since the symptoms went away I do not think that h/g's are the problem now.
  12. I'll stick my 2 cents here also. I've done 2 h/g jobs, both with the engine in the car. How you want to do it is your decision. But Keven is correct, you do want to make sure it is the h/g before you start the job. I did not have alot of luck pumping 100 psi air into the cylinders on my 2 cars. After performing the air test twice on my 98, I got just a slight amount of air in the tank from #1 cylinder. On my son's 01 Deville, I could not get air flowing on any cylinder. But he indeed had a bad h/g.So the air test is not always accurate. Also, the tried and true block test may not always exactly correct. Last summer, my 01 Deville started to indicate a slightly (1 bar) higher temp when going up long hills.No coolant loss or any other symptoms. The block test showed slightly green. Due to other issues, I did not have the time to fix it right away (luckily), Here it is October and I am still driving it 50 miles a day for work, and with the cooler weather, it shows no symptoms at all. The car is still not using coolant, but it is going thru transmission fluid at a high rate. That, along with the smell of the coolant, makes me think I have a trans fluid leak in the radiator. The block test kit looks for hydrocarbons. I'm no chemist, but I think transmission fluid also contains hydrocarbons. My point here, make absolutely sure before you go thru all the trouble that the h/g is actually bad.
  13. I did not use studs, I used timeserts once and Norm's inserts the second time. I'm sure that there is not nearly enough room to do studs, but there is plenty of room when doing inserts. I had a few shortcuts that I figuired out, and although most people wont agree, I believe my way to be easier. Most of the work is inside the engine, due to the overhead cams and chains. Years ago when I was researching doing the hg, I saw on the other Caddy forum most of the guys talked about breaking into the ac system.
  14. I'm just going by what other people said. I did both my hg replacements with the engine in the car.
  15. Timeserts, Norms inserts, and studs are the accepted repairs for Northstars. I've used timeserts once, and Norms once in the 2 HG jobs I did. Although I had no problems with the timeserts, I would use the Norms in the future due to the more robust design. I would not let anyone try 'bigger bolts'. Good information in the above posts concerning what else to replace. I would replace the ac compressor as you mentioned, the system must be broken into to drop the cradle anyway. The only ac failures I have had owning 7 devilles 1988 to 2005 were compressor related, injesting themselves and spreading shrapnel thru the system. That being said, it is your decision as to how much to put into your car. I replaced the hg on my son's 2001 Deville last winter, the car has 170k miles on it now, and I do not regret it, but I did all the work myself so the cost was much lower.
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