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Cadillac engine repair questions and answers

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  • thomas.r.orlik
    thomas.r.orlik - 2012 Cadillac CTS - Engine - 6/3/2013
    • Jimm
      6/3/2013 Jimm
      Check the TSB details at these websites;,, -among others.

      Since there may be the technical service bulletin and your vehicle is MY 2012 - what does the dealership suggest they might do about this issue on your vehicle? By the way, the correct TSB designation is: PIP4523A

      Here is information and a website ( on what GM is claiming as 'normal' noise for the supercharger....WOW!!

      The torsional isolator is used in the CTSv LSA engine to isolate potential gear rattle noise during idle. The isolator contains a torsional spring that fits over the shaft. Purpose of the shaft is to distribute the stresses in the torsional spring. As the spring goes thru its travel, the inside of the coils can contact the shaft. The spring material is intentionally harder than the shaft which by design results in visual witness marks and/or limited wear on the shaft. The witness marks and/or limited wear is expected and has been observed on all the Eaton component durability tests, GM engine and vehicle durability tests and on customer vehicles with no impact on the functionality of the spring and isolator. The shaft and isolator are in a sealed cavity, separate from the rest of the supercharger and engine.

      Q: Will this shaft wear harm my engine?

      A: No. The visible wear will not damage the engine. The supercharger and the engine were tested and successfully validated to meet all GM durability requirements…which are much more severe than any customer usage.

      Q: What causes this wear?

      A: The isolator contains a torsional spring that fits over the shaft. The purpose of the shaft is to better distribute the stresses in the torsional spring and prolong its life. As the spring goes thru its travel, the inside of the coils can contact the shaft. The spring is a harder material than the shaft…so that when there is contact, the spring will not potentially break. If the spring breaks, then the torsional isolator function is lost.
  • tgarry5270
    0 answer
  • robg4678
    robg4678 - 1996 Cadillac Seville - Engine - 6/2/2013
    Where can I find the ant theft control unit for my 1996 cadilac seville
    I've replaced the key, tumbler for the key had programmed. replaced starter and every relay on the car. replaced every electronic device on the car except the anti theft module which I cannot find I've checked the doors behind and under all seats....The car will not ...
    • HouseCallAuto
      6/2/2013 HouseCallAuto
      I have worked on GM anti-theft systems for many years in all different body styles and never had to ever replace an anti-theft module. That being said I believe that you may have something else going on here.In more than 90% of all cases relating to a no crank situation in the PassKey system, the cause is at least one wire being broken at the ignition lock cylinder which you said you replaced already? Your first sentence is not clear to me. **I've replaced the key, tumbler for the key had programmed.** Does this sentence say you replaced the ignition lock cylinder?
  • jkcaddy
    jkcaddy - 1996 Cadillac Eldorado - Engine - 5/25/2013
    A/c works fine in my area then when I drive to a hotter area it stops working New compressor put in 2 years ago
    It blows warm air when it's really hot outside and works fine in milder climates
    0 answer
  • gail.ross
    gail.ross - 2000 Cadillac Escalade - Engine - 5/24/2013
    Distributor cap was cracked. Rained and car wouldnt start. Put new spark plugs in. Tried starting twice. Took to shop. N
    real slow pick up/take off.
    0 answer
  • joe
    joe - 1987 Cadillac Brougham - Engine - 5/21/2013
    Fuse box diagram for 87 Cadillac brougham
    could anyone tell me where I can find a diagram to tell me which fuses are which for a 87 Cadillac brougham, thanks Joe
    • Jimm
      5/21/2013 Jimm
      Try these websites;,, or for the fuse box diagram.
  • joe
    joe - 1987 Cadillac Brougham - Engine - 5/20/2013
    Gas gauge not working
    can someone tell me where the fuse is located for gas gauge, fuse box isn't marked, I have a book and the troubleshooting part says if warning lights are not working either it's probably the fuse, the only idiot light that comes on is the battery. I checked all ...
    0 answer
  • tonyo49er
    tonyo49er - 1995 Cadillac Seville - Engine - 5/19/2013
    While driving on freeway at 65 mph, it seemed as if the transmission came out of high gear. the car drives at 40 mph,
    but won't go into higher gear. the service engine soon came on and stayed on until i turned the car off. it then ran fine, but today it's doing the same. the car was just tuned up a month ago and runs perfectly. pls advise.... thx
    0 answer
  • kalmasi80
    kalmasi80 - 1999 Cadillac Catera - Engine - 5/17/2013
    Why does my car, all of a sudden, have trouble accelerating?
    A few weeks ago I had a LOT of work done on my car. I got a new(er) engine, new motor mounts, a new radiator, new heater core, and new tie rods and sleeve. The car itself has almost 89k miles on it but the new engine only has about 35k miles. A few days ago I was ...
    • frankiedonnn
      5/17/2013 frankiedonnn
      It seems to me you should go back to the garage where the work was performed,surely there is some waranty on the job.Or you could get a scan for free at Advance Auto and see if there are any codes to enlighten as to what could be going on with it.
    CHUCK - 2006 Cadillac DTS - Engine - 5/11/2013
    No cold air coming from ac
    high mileage,compressor is engaged. the readings on low side are approx. 145 psi. and approx.45 psi. on acceleration the low side moves a little, but nothing on the high side. this is the first problem ive encountered with this ac system. sounds like either a bad ...
    0 answer
  • poindexter1832
    poindexter1832 - 2003 Cadillac CTS - Engine - 5/5/2013
    If the comp cam brakes will that lock up a motor
    • Jimm
      12/14/2012 Jimm
      Need more information - what is meant by 'comp cam'?
      12/15/2012 poindexter1832
      the mechanic said there were broken parts inside the motor, and he don,t know were they came from. and he said something about cam shaft may have broke.the car had oil in it and the pump was working.
    • Jimm
      12/17/2012 Jimm
      OK - if the camshaft is broken, then Yes that will lock the motor from turning / operating. Your choices are limited to; replace or rebuild the existing engine if it's even rebuildable (depending upon the damage), or exchange the engine for a rebuild.

      Try the many on-line auto parts sources; such as -, or for the replacement parts. The replacement rebuilt engine lists for around $1800.00 or more - for the long block (minus accessories and labor to install).
      12/26/2012 poindexter1832
      i have insurance.but i have one more question. i had a used thottle body put on this year,i don,t know if the tech put on a new gasket or not can that lock the motor.?
    • michaelrickey
      5/5/2013 michaelrickey
      No not in any way shape or form!
  • Schwabyjc
    Schwabyjc - 2007 Cadillac Escalade - Engine - 5/5/2013
    Dealer says 'oil filter housing' is cracked and needs to b placed.what is the oil filter housing?
    Occasional oil drip on garage floor
    • michaelrickey
      5/5/2013 michaelrickey
      This is a cast standoff like piece where the oil filter spins on.
  • plipkin3
    plipkin3 - 2001 Cadillac DeVille - Engine - 5/5/2013
    Fuel date center display starts flashing between functions after driving for a while (gets hot?)
    Have replace control, no effect. Change oil light also starts flashing.
    • frankiedonnn
      5/5/2013 frankiedonnn
      Changing the oil and filter is definitely a good idea if it has'nt already been changed recently.But look for low coolant level and visible leaks from radiator and connecting hoses,water-pump weep- hole.Check for worn drive-belts.If the water-pump drive-belt is slipping ,it would overheat.If it's a pre owned car one does'nt know if the belts have ever be replaced,so i would replace them unless they look really new.Also I would flush the cooling system and replace the coolant because coolant loses it's effectiveness after a year or two.A lot of little things together can cause an engine to overheat.But it is important to consider big problems too like coolant in the engine oil or oil in the coolant which you will notice when checking coolant and oil levels.I hope it is something small.
  • poppygigt
    poppygigt - 1998 Cadillac Seville - Engine - 5/4/2013
    How to replace rear spark plugs
    what has to be removed to do it
    • Jimm
      5/4/2013 Jimm
      For access to the rear mounted spark plugs - it's best to raise the front end (support on jack stands) and remove the front wheels. The spark plugs can be accessed through the front fenderwells to the engine.
  • quesadaguard-purchases
    quesadaguard-purchases - 2001 Cadillac Seville - Engine - 5/4/2013
    Why do cold air from side and hot air from the other side.
    mileage 55,000. I have taken it to the dealer several times and 1st time they inserted coolant. 2 time they said part was filled with air and they added more coolant.
    • Jimm
      5/4/2013 Jimm
      Need more information - are you referring to the air conditioning system? Are you referring to the vent controls out-of-adjustment? What service or part did the dealer say was...'filled with air'?
    • CVO
      5/4/2013 CVO
      The system is low on refrigerant, and only after it is confirmed if it is in need of refrigerant or not can the blend door actuator be a cause. This is a confusing symptom - cold on pass side and hot on the other, it even throws off good mechanics, but in the majority of cases the cause simply is that the system is low, The refrigerant only fills half of the evaporator and the half that it fills is directly inline with the pass side ducting and the other side that lacks refrigerant is inline with the driver side ducting.

      Cool on the driver side and hot on the pass side is almost always caused by a faulty pass side blend door actuator. If it were the reverse (cool on pass side and hot on driver side the cause is always that the system is low on refrigerant.)