Lack of power, loss of oil pressure
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  1. #1
    mikeay's Avatar
    mikeay is offline Cadillac Owners Fanatic
    Automobile(s): 1996 Cadillac Seville STS
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    Lack of power, loss of oil pressure

    I found this in my quest to find things interesting:

    1996 Cadillac Seville STS
    LACK OF POWER, LOSS OF OIL PRESSURE
    LACK OF POWER, LOSS OF OIL PRESSURE
    TECHNICAL SERVICE BULLETIN

    Reference Number(s): 47-61-32B, Date of Issue: March, 1996
    Superceded Bulletin(s): 47-61-32A, 47-61-32
    LACK OF POWER, LOSS OF OIL PRESSURE (CHECK HARMONIC
    BALANCER BOLT TORQUE AND FLUSH OIL PUMP RELIEF VALVE)
    Model(s): 1993 Cadillac Allante
    1993-96 Cadillac Eldorado, Seville
    1994-96 Cadillac Concours
    1996 Cadillac Sedan DeVille (all above with 4.6L Engine (VINs Y, 9, RPOs LD8, L37)
    1995-96 Oldsmobile Aurora with 4.0L Engine (VIN C - RPO L47)
    Section: 6 - Engine
    Bulletin No.: 47-61-32B
    Date: March, 1996
    NOTE: This bulletin supersedes Technical Service Bulletin number 47-61-32A, (Section6 - Engine).
    CONDITION
    Some owners may comment on low oil pressure which may display a "Low Oil Pressure" message and/or a
    "Malfunction Indicator Lamp" (Service Engine Soon) telltale. Vehicle owners may comment that these telltale
    messages illuminate at engine speeds of 1000 RPM and above.
    CAUSE
    Lack of oil pressure may be caused by:
    z Particles from the manufacturing process sticking the oil pump relief valve, not allowing the valve to seal
    to its seat which does not allow the pump to prime.
    z A loose harmonic balancer bolt which will result in the oil pump not turning.
    CORRECTION
    Thursday, February 02, 2006 8:28:42 PM Page 1 © 2004 Mitchell Repair Information Company, LLC.

    1996 Cadillac Seville STS
    LACK OF POWER, LOSS OF OIL PRESSURE
    Ensure the harmonic balancer bolt is tightened to spec. The correct torque value for this bolt is 60 N.m (44 ft-lb)
    plus 120° for 1993-95 engines with an M18 bolt and 50 N.m (37 ft-lb) plus 120° for 1996 engines with an M14
    bolt.
    NOTE: A small number of 1995 engines were built with crankshafts equipped with the
    M14 bolt. Identify the size of the bolt to determine the proper torque
    specification.

    If the bolt is to specification, the cause of the low oil pressure is internal to the pump.
    To remove particles from the relief valve in the oil pump, perform the following procedure:

    1. Add an ADDITIONAL 10 to 12 quarts (liters) of engine oil to the engine. This will immerse the pump
    completely in oil.

    2. Start the engine and repeatedly open the throttle (rev the engine) from idle to 3500 RPM. This will allow
    the pump to prime; cycling the relief valve forces any debris from the relief valve.
    NOTE: Do not operate the engine above 3500 RPM. Doing so will aerate the
    engine oil and/or force excess engine oil into the PCV system. DO NOT
    DRIVE THE VEHICLE while the additional oil is in the engine.
    NOTE: After the engine has sufficient oil pressure, any valve train noise
    associated with this low oil pressure condition should not be evident upon
    restarting the vehicle and the low oil pressure and malfunction indicator
    lamp (service engine soon) messages should not remain illuminated.

    3. After engine has sufficient oil pressure, drain the crankcase. Reinstall the engine oil pan drain plug.

    4. Add 7 quarts of engine oil and check the oil level. Make sure the vehicle is on a level surface and the
    engine operating temperature is 100°C when checking the oil level with the engine stopped for 15-20
    seconds.

    WARRANTY INFORMATION
    For vehicles repaired under warranty, use:
    LABOR OPERATION NO.: J0989
    LABOR TIME: 0.5 hr.

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  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: Lack of power, loss of oil pressure

    Yes., our former Guru mentioned this several times, although I recall him saying overfill by 8 qts.

  4. #3
    boobers2 is offline Cadillac Owners Member
    Join Date
    Jun 2006
    Posts
    1

    Re: Lack of power, loss of oil pressure

    My 1997 Eldorado Etc Is Overheating And Oil Light Comes On

  5. #4
    phillyfrank is offline Cadillac Owners Member
    Automobile(s): 93 Eldorado
    Join Date
    Apr 2009
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    Re: Lack of power, loss of oil pressure

    does the overflow method work on 94 Eldorado with a 4.9 engine? I do NOT have the Northstar.

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