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Cadillac engine repair questions and answers

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  • clark.terrill
    clark.terrill - 2000 Cadillac DeVille - Engine - 7/6/2013
    Fix hole/leak in "radiator surge outlet pipe" Between fill container and engine. Rear top of eng.
    A hole has rusted thru this metal pipe. From the radiator fill container to the engine it is a hose, this pipe and another hose. How to fix/ replace this tube?
     
    • Jimm
      7/6/2013 Jimm
      The radiator outlet pipe must be replaced if there is a hole / leaking. Try this part source - cost is around $17.00. www.gmpartsgiant.com The GM part number is: 25672302
      Jimm
      7/6/2013 clark.terrill
      The web site states the part is not available. However, with the part number I should be able to better search.
      Thank you.
  • dgorbea
    dgorbea - 1998 Cadillac DeVille - Engine - 6/25/2013
    What is the optimal operating temperature of the engine
     
    • Jimm
      6/25/2013 Jimm
      The optimal operating temperatures will vary in and around the engine. For example, the combustion chamber (where the air / fuel mixture ignites) temperature is around 4,500 F (2,500 C) for optimal fuel mixture burning.

      I think you may be referring to the cooling system temperature - such as the thermaostat temperature rating. The thermostat for the 4.6L engine operates (temperature rating) at 180 F.
  • dgorbea
    dgorbea - 1998 Cadillac DeVille - Engine - 6/24/2013
    What is the normal operating temperature of the engine
     
    • CVO
      6/24/2013 CVO
      Engine cooling temperature is running from 220- 238 degrees.
  • sonnieymoney
    sonnieymoney - 1991 Cadillac DeVille - Engine - 6/23/2013
    My car has no power when i step on the gas,
    the car has 96,000 org miles,the car hesitate when applying the gas peddle then it picks up but will not exceed 50to55mph,I;ve replaced sparkplus,an wires,timming chain angears,distribertercap,roter,moduel transmissinomoduel fuel pump,waterpump an it stilllacks ...
     
    • Jimm
      6/23/2013 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
      Jimm
      6/23/2013 CVO
      See this site on GM 1983-95 vehicles OBD1 codes self-retrieval.
      http://www.extreme-check-engine-light-codes.com...
  • sonnieymoney
    sonnieymoney - 1991 Cadillac DeVille - Engine - 6/23/2013
    My lacks power,hesitate wheni step on the gas
    the car has 96,000 origanal miles,I've changed the spark plugsan wires,distribertercap,coil,roter,anmoduel,replaced timmingchain angears,fuelpump,waterpump transmission moduel,..the car wont excelrate past 55mph,unless itsgoing down hill when on an incline it roll ...
     
    • Jimm
      6/23/2013 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • sonnieymoney
    sonnieymoney - 1991 Cadillac DeVille - Engine - 6/23/2013
    My lacks power,hesitate wheni step on the gas
    the car has 96,000 origanal miles,I've changed the spark plugsan wires,distribertercap,coil,roter,anmoduel,replaced timmingchain angears,fuelpump,waterpump transmission moduel,..the car wont excelrate past 55mph,unless itsgoing down hill when on an incline it roll ...
     
    • Jimm
      6/23/2013 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • Steve
    Steve - 1996 Cadillac Eldorado - Engine - 6/23/2013
    When I accelerate my car hard, the check engine light comes on and I get message "emission system needs work" .
    The car also runs rough and hesitates. When I stop the car for awhile and then restart it, the problems are gone and the check engine light and messages are gone.
     
    • Jimm
      6/23/2013 Jimm
      First step - have the check engine light or stored fault codes scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance.
  • biskit5.0
    biskit5.0 - 1997 Cadillac Eldorado - Engine - 6/23/2013
    Has northstar engine burns up alternators goes from low voltage to high voltage then no charge
    battery fully charged and is good
     
    • Jimm
      6/23/2013 Jimm
      What brand or type of alternators are being installed? What is the voltage and condition of the alternator output at the time of the failure? Has the charging system been tested (for free) after the installation? Is the alternator drive belt tension correct?
      Be sure to purchase a new - not remanufactured - alternator; AC Delco or Remy brand. Check the many on-line auto parts sources, such as; www.partsgeek.com, www.carpartswarehouse.com, or www.rockauto.com for the replacement parts. For example, they (RockAuto) list the new alternator from around $113.00 for your vehicle.
      Jimm
      6/23/2013 John's Auto Repair
      I agree with Jimms stay away from rebuilts
  • willibri3
    willibri3 - 1998 Cadillac DeVille - Engine - 6/21/2013
    Oil dash light symbol flickers on when water temp. reaches 217 or higher
    When gear shift lever is put into N and /or accelerator is pushed very lightlyand RPM's increase, light goes out all while sitting in heavy traffic and outside temp is very high and water temp very high.I am told computer cannot be adjusted to increase idle slightly ...
     
    • John's Auto Repair
      6/21/2013 John's Auto Repair
      Your oil pressure is dropping below 5 PSI. does car have high mileage? Check with a positive
      pressure gauge to verify. ( mechanical pressure gauge)
  • la.rinehart
    la.rinehart - 1999 Cadillac Eldorado - Engine - 6/17/2013
    Start disabled displays when trying to start. Manual says check condition of the key. I have two keys, neither work.
    Would cleaning ignition switch help?
     
    0 answer
  • wabhou2
    wabhou2 - 1991 Cadillac Seville - Engine - 6/15/2013
    Have 1991 deceased Fathers TOWNCAR...not Sevile...but its not listed in choice.
    Orginal 72K miles...has had 4 factory starters & solenid/starter last replaced < 6 months ago. Won't always engage...can sometimes use sm. prybar to turn flywhell or let cool down say 30 min's & it may statrt. Next I figure is engine wiring harness replacement...ANY ...
     
    • Jimm
      6/15/2013 Jimm
      To check the starter gear and flywheel / flexplate teeth alignment and contact pattern - apply some machinist blueing to the starter teeth and the the flywheel / flexplate teeth. Then, attempt to start the engine several times.
      Observe the contact pattern left by the starter engagement - the pattern should be squarely in the middle of the tooth. If off somewhat (not centered) then you can either adjust / shim the starter in the correct direction, or replace the starter. If the flywheel / flexplate teeth are worn - then the problem is not with the starter motor.
      The flexplate / flywheel must be replaced instead. Check the many on-line auto parts sources, such as; www.autopartswarehouse, www.carpartswarehouse.com, or www.rockauto.com for the replacement parts.
  • wabhou2
    wabhou2 - 1991 Cadillac Seville - Engine - 6/15/2013
    Have deaceased fathers 91 Cadilac Towncar (NOT SEville)..not listed in choices.
    Has had 4 factory staters in 72K lifespan..last one < 6 months ago..new soenioids too. Battery correct. Starter won't always engage...sometimes can manually turn flywheel w/ sm. pry bar & it works..other time I let it sit for 1/2 hr. or so ( to cool down abit) & ...
     
    • Jimm
      6/15/2013 Jimm
      To check the starter gear and flywheel / flexplate teeth alignment and contact pattern - apply some machinist blueing to the starter teeth and the the flywheel / flexplate teeth. Then, attempt to start the engine several times.
      Observe the contact pattern left by the starter engagement - the pattern should be squarely in the middle of the tooth. If off somewhat (not centered) then you can either adjust / shim the starter in the correct direction, or replace the starter. If the flywheel / flexplate teeth are worn - then the problem is not with the starter motor.
      The flexplate / flywheel must be replaced instead. Check the many on-line auto parts sources, such as; www.autopartswarehouse, www.carpartswarehouse.com, or www.rockauto.com for the replacement parts.
      Jimm
      6/16/2013 wabhou2
      Thank you...flywheel pattern shows no signs of being worn or pff center...actually surprsed me when I looked ..at how good it looks.
      This puts me back to starter replacment again.
      Am I toyallyoff thinking of wring harness ?
  • wabhou2
    wabhou2 - 1996 Cadillac Seville - Engine - 6/15/2013
    Repalcement engine...new? Refurbish, remanufactored..rebuit....out of junked car ?
    water from radiator goes into oil..I believe block cracked...but could be seals/head gaskets I guess too. Exterior & interior all in great shape...but want to replace engine...and not cost a mint. Any advice on above engine choices ??..Whats the differences in ...
     
    • Jimm
      6/15/2013 Jimm
      With coolant leaking into the oil, the cause is most likely to be a bad head gasket or a cracked cylinder head. Do not reach any conclusion until you change the oil and monitor it for this problem repeating.

      There are at least two tests to perorm in order to determine the leak source and to what extent the repairs should be; one) cyliner leakdown test, and two) cylinder compression test - these are inexpensive in comparison to the repair or a rebuilt engine.
      Jimm
      6/16/2013 wabhou2
      Thank you. I know how to do compression test but not thr leak test,
      Today put in new battery..woudn"t crank over or even click..like w/ bad solenoid.It sat up for a year before it was gived to me.All electric came on...w/ multiple dummy"check engie, fluids"alerts.Head gaket could be ether front ( easiser to replace ) or back onr ( harder to rplace ), right ? What about testing for bad starter or altenator? Will change out oil...but can't heat it up first as she won't start. Change atifreeze?
      Jimm
      6/16/2013 wabhou2
      Also, as radiator was dry when I first clhecked it,I added water to it, still didn't crank but dip stick then felt more like water than oil consistency & smeled more like gas than oil. Radiator went dry w/o leaks on ground or from hoses. Should old gas be drained ( how ) or just new premium added ? Haven't got it to fire over/crank yet.
      Tnx, again Wayne
  • Armando
    Armando - 2000 Cadillac DeVille - Engine - 6/14/2013
    How much coolant does it calls for
    Lost of coolant
     
    • Jimm
      6/14/2013 Jimm
      The cooling system capacity - when empty holds 12.5 quarts (11.8 liters). This would be; 6.25 quarts of anti-freeze to the same amount of water - for the proper 50/50 mixture.
  • andrew.st.aubyn
    andrew.st.aubyn - 1994 Cadillac DeVille - Engine - 6/12/2013
    I encountered a leak and found the wheel where the anti freeze is leaking, is behind this wheel..not sure of the name?
    there is a slight knock and wobble when the engine is running and this wheel in question shakes by about 2 mm where the anti freeze is leaking from..mounted on the side of engine, tensioner might be the name, centered in the serpentines belt about midway on right ...
     
    • Jimm
      6/8/2013 Jimm
      This may be the water pump and pulley on the front of the pump. The water pump may be leaking from the center bearing and seal area.
      Check the many on-line auto parts sources, such as; www.autopartswarehouse, www.carpartswarehouse.com, or www.rockauto.com for the replacement parts. For example, they (RockAuto) list the water pump (includes gasket) from around $29.00 for your vehicle.

      Only you may answer the difficulty of this repair - as a first step, chek the 'How-To-Guides' feature on the AutoMD website, and reference an auto repair manual - such as at the local library to research the steps involved for your vehicle.
      Jimm
      6/12/2013 andrew.st.aubyn
      thankyou Jimm, this was very helpful...I ended up giving in to the woes of "just let the mechanic take care of it!" End of repairs cost $306. ....and to see the rockAuto cost for a water pump (includes gasket) just makes the burn (in my pocket) much more unbearable...next question..is there a way to avoid being burned by a mechanic that includes the cost of his repairs by inflating the part value to beyond and above what the fix entails?
    • andrew.st.aubyn
      6/12/2013 andrew.st.aubyn
      The part listed at autoZone was about the same as the cost of the part which I quoted to the mechanic from RockAuto, runs from between 26 - 45 dollars low to high end...includes gasket sealers and the works..don't know why he could only find a replacement part for 80+ dollars but that was the answer I got after listening to his advice which, subsequently.. was followed by his assistant who came into the room behind him..."yeah, its a hard fix cause its how cadillacs are made...have to get down there in the engine"...go fig. geez!!!*&^$#@
 
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