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  1. New cylinder heads after 90k miles and failing timing chain tensioners

    Northstar Engines and System Technical Discussion
    As a result of driving on LPG, I experienced compression leakage during cold run on cyl. #1. Both the inlet valves leaked as a result of burnt valves/seats due to lean mixture burning in cyl.#1 causing a higher combustion temperature. The lean mixture was a result of bleed air being mixed at the...
  2. 2005 STS Oil and Air Leaks GALORE

    Cadillac STS Forum 2005 through 2012
    My wife has a 2005 STS with the Northstar V8. The car started losing a lot of oil, I had a good diagnostic mechanic check it out. Here's what I have: Both valve cover gaskets are leaking small leak at the oil filter adapter PCV valve hose needs to be replaced variable valve timer solenoid needs...
  3. 2000 Eldorado surge tank hose coolant leak

    Northstar Engines and System Technical Discussion
    Hi all! Bought my 2000 eldorado a year ago. I know the radiator had been replaced just before. It’s also been in an accident and repaired because it’s for a bent subframe. So it’s not close to perfect. But it was cheap and better than what I had. Plus- tushy toasters. Anyway, I’ve got a coolant...
  4. Need some help with Northstar swap project.

    Northstar Engines and System Technical Discussion
    Howdy Cadillac gang, I have own a 1988 Eldorado with a 4.5 litre v8. The body is in great shape, but the engine is a bit tired, and I wanted to put something a bit more peppy in it. I was looking long and hard at the 200hp 4.9 and 4.5 High Technology engines from the era, but I saw that...
  5. 1994 Seville Engine Swap ... 4.6L

    Cadillac Seville / Cadillac Eldorado Forum
    Hi i got a 93 Seville with a 4.9 gm as a donor car , a 90 VW Jetta Diesel donor car and I have a 94 Seville sts with a 4.6L . the 94 is in immaculate shape besides the fact it has a cracked block . I am having issues trying to find a replacement block or engine so i have a couple options. the...
  6. 2002 Deville base overheats can't figure out what's wrong

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Ive got a 2002 cadillac deville base im gonna try to give as much detail as possible here. First of all car only gas 106000 miles... been driving it for about 6 months with absolutely no problems furthest i would go was about 60 miles and nothing would go wrong the car ran like a champ then...
  7. STS-V - Finally got one !!!

    Cadillac STS-V Series Forum
    What an amazing Cadillac!! The car being a 2007 with an estimated 80k price tag new, far from my reaches back then but as time will have it, some things are worth the wait! V8s Forever
  8. Greetings from Finland!

    Community Lounge, Introductions and General Discus
    Hi everyone. Just wanted to introduce myself. I bought a 1992 Seville STS a couple of weeks ago and just registered to this forum. From the looks of it there's plenty of advice available should I need it. The car is in very good condition for it's age. Completely rust free, for example. It's...
  9. Antifreeze Reserve tank boiling over

    Cadillac Seville / Cadillac Eldorado Forum
    I have a 92 STS with the 4.9 V8, and when I'm idleing at a stop light or drive thru it starts over heating. as long as I'm moving it's fine. Temp got up to 190 degrees and I started seeing steam appear around the hood. I pulled over and opened the hood and that plastic antifreeze overflow tank...
  10. 2000 Deville Fix It Before It Fails?

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Hello All, I have been pouring over topics here for weeks now. I am about to "inherit" a 2000 base Deville from my wife's God Mother. She had owned it since new but it has not been garaged (in a parking lot of a retirement center). It has appx 42,000 miles and is in very good...
  11. Deville Concours ---> DTS......Differences?

    Cadillac DeVille 1985 to 2005 including:1985-1992
    What are the major differences between the 1997-99 DeVille Concours and 00-05 Deville DTS? I know it's a whole new body and platform, but it's the same underlying principle below....the full size DeVille with all the sporty accoutrements. Does the DTS drive a lot tighter than the Concours? Does...
  12. New bearings, new rings, 1000 miles and still burning oil

    Northstar Engines and System Technical Discussion
    Ok. I'm about 1000 miles into this rebuilt engine. Can anyone tell me why I would still be smoking? It smokes terribly when I downshift and anytime I am braking after exiting the interstate or after traveling at high speeds. 99 Seville STS. Here's what was done: Jakes head kit installed...
  13. Heated seats

    Cadillac Catera and Cimarron Forum
    While i was working on my stereo i noticed that the wire harness was already prepared for heated seats with the wires going to where the switch would go and there was already a fuse in the fuse box for it.. sooo its a long shot but do the seats have the heat pads in them from the factory? I have...
  14. New here, got a couple of questions

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Hi all, I am currently the owner of a e36 BMW and am on bimmerforums but I am looking at purchasing a 2001 cadillac deville dhs. I am not very familiar with caddys and have actually read and heard nothing but horrible things about these cars and the northstar engine. On to the questions.. the...
  15. Current Issues Is Back

    Current Issues
    I'm not quite sure what went wrong with the upgrade, but this forum wasn't working afterwards. It's back.. If anything seems out of the ordinary, please let me know. Thank you...
  16. Is my ECM faulty?

    Cadillac Seville / Cadillac Eldorado Forum
    Hi all, I have a 97 Seville SLS. All the sudden, I started getting weird messages on my display saying that the oil life was at 0% (i just changed it a few weeks ago), then the temp was over to the H and then it said to pull car over and stop. I thought that it may have been the water pump at...
  17. 02 Northstar vin9 into 99 STS with Trans, harness, and PCM

    Cadillac Seville / Cadillac Eldorado Forum
    I found a 2002 Seville STS Vin9 L37 Northstar in cradle with trans/harness/pcm for a good deal. I searched the forum, but couldn't find a specific example that answered my question completely. My question is: "What do I need to do to get the dang thing to work in a 99 Seville STS?" I'm talking...
  18. motor mount bad please help

    Cadillac Seville / Cadillac Eldorado Forum
    my motor looks like is going 2 come out the hood when i put it in drive u see the engine raise up. where is moter mount located? is it a do it your self or 2 the shop? and can i drive it 2 the shop with out messing up something else? please help 2 a,, my cadillac buddies
  19. sts overheating problem

    Cadillac STS Forum 2005 through 2012
    Ok everyone im a pretty good mechanic and this car has me all two days ago I drove the car about 200 miles round trip and all of a sudden it just went all the way hot. pulled over and let it cool down started it and it was normal then went hot again. so I got home and I put...
  20. Now, on the other hand, some of my friends have a GREAT taste in cars.

    Community Lounge, Introductions and General Discus
    My buddy Ryan has a 1996 Fleetwood Brougham that he keeps in very good condition. It's triple black, and it's got a low 97k miles on it. He only drives it once a month or so, and only on weekends, when it's not being driven, it's parked in a storage garage under a cover. He had a '96 Town Car as...