Question about 1992 Cadillac DeVille

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Does my 92 deville have coolant bypass hose? - 1992 Cadillac DeVille

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Yes, it is on the back or the engine near the firewall.

Posted on Jun 22, 2009

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Looking for a diagram of waterpump on a 1999 cadillac deville concours 4.6 liter


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Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the coolant.
  3. Remove or disconnect the following:

    Negative battery cable
Upper fill panel, if equipped
AIR injection control valve, if equipped
Air cleaner
Oil level indicator tube nut, if necessary
Water pump belt cover
Water pump drive beltLower radiator hose
Thermostat bypass hose from the coolant inlet housing
Water pump cover

Remove the water pump by rotating it clockwise using special Tool J 38816-1A (water pump remover/installer).
To install:
Install the water pump with a new O-ring, by turning it counterclockwise using the special tool, until it stops. Torque the water pump to 73 ft. lbs. (100 Nm).

Install or connect the following:

Water pump cover. Torque the bolts to 89 inch lbs. (10 Nm).
Lower radiator hose
Thermostat bypass hose to the coolant inlet housing
Water pump drive belt
Water pump belt cover
Oil level indicator tube nut, if necessary
Air cleaner
AIR injection control valve, if equipped
Upper fill panel, if equipped
Negative battery cable

  • Refill and bleed the cooling system.

  • Run the engine and check for leaks.
  • Oct 04, 2017 | Cadillac Cars & Trucks

    1 Answer

    My 02 cad deville leaking coolant from some sort of bypass hose located toward the back of compartment drivers side


    Many Caddys have/had small "radiators" for heat to the rear passengers located under the front seats. Most shops (or owners) never check them or know they exist.

    Oct 04, 2014 | 2002 Cadillac Deville

    1 Answer

    92 cad sedan deville.heater bypass steel lines.are leaking can I replace the steel tube with a heater hose since there isn't a replacement part in the whole USA!an I don't know where the front half of


    The reason you can't get one is that replacement lines are easily built - unless they are very critical or complex, OEM lines cost too much to stock. Remove the old line, take to a auto parts store, get a new length of the correct tubing, the correct fittings and a tubing flare tool and build one yourself. Careful with any bends - you may need a tubing bender as well.

    Sep 11, 2014 | 1992 Cadillac DeVille

    1 Answer

    I have a 92 grand marquis that runs hot. I changed the intake gasket, water pump, thermostat,and all the hoses. I also flushed it out multiple times. I notice the heater core was leaking so i bypassed it...


    Is the Exhaust Converter 12 years old or more & blocked ?

    Is the timing chain worn & timing off ?

    Do you loose coolant ,if so do a combustion gas test
    at the coolant fill cap

    Aug 23, 2013 | Cars & Trucks

    1 Answer

    92 Cadillac Deville Overheating


    Let the engine cool, remove radiator cap, start the engine let it warm up.
    Make sure the radiator is full. Look in the radiator for a bubbling mist. that is the sign of a bad head gasket. Also caddies with aluminum blocks require special coolant.

    Aug 01, 2012 | 1992 Cadillac DeVille

    1 Answer

    Can i by pass the heater core


    i`m guessing that you are talking about the heater core blew and you have coolant on the inside of your car.you can bypass the heater core by disconnecting the hoses that connect to the heater core and connecting a hose connector between the two hoses and your done.however if you need heat you won`t have it until the heater core is replaced.

    Oct 31, 2011 | 1998 Cadillac DeVille

    1 Answer

    My 92 Deville stalls out when it gets hot


    ENGINE COULD BE OVER HEATING.REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.MAKE SURE YOU HAVE 50 /50 MIXTURE ANTIFREEZE AND WATER IN THE COOLANT SYSTEM.

    Aug 20, 2011 | 1992 Cadillac DeVille

    1 Answer

    How do i change the water pump belt on a 2001 Cadillac Deville .


    2001 Cadillac Deville 4.6L SFI DOHC 8cyl Removal & Installation procedure...

    1. Before servicing the vehicle, refer to the Precautions section.
    2. Drain the coolant.
    3. Remove or disconnect the following:
    Negative battery cable
    Upper fill panel, if equipped
    AIR injection control valve, if equipped
    Air cleaner
    Oil level indicator tube nut, if necessary
    Water pump belt cover
    Water pump drive belt
    Lower radiator hose
    Thermostat bypass hose from the coolant inlet housing
    Water pump cover

    4. Remove the water pump by rotating it clockwise using special Tool J 38816-1A (water pump remover/installer).

    To install:

    1. Install the water pump with a new O-ring, by turning it counterclockwise using the special tool, until it stops. Torque the water pump to 73 ft. lbs. (100 Nm).

    1. zjlimited_842.jpg

    Fig. To ensure proper operation, be sure to install a new O-ring (click for zoom)

    2. Install or connect the following:
    Water pump cover. Torque the bolts to 89 inch lbs. (10 Nm).
    Lower radiator hose
    Thermostat bypass hose to the coolant inlet housing
    Water pump drive belt
    Water pump belt cover
    Oil level indicator tube nut, if necessary
    Air cleaner
    AIR injection control valve, if equipped
    Upper fill panel, if equipped
    Negative battery cable

    3. Refill and bleed the cooling system.
    4. Run the engine and check for leaks.


    Hope this helps (remember to rate this comments)

    Mar 10, 2011 | 2001 Cadillac DeVille

    1 Answer

    Broken coolant line


    Coolant bypass tube for heater . put the car on a lift to change.be safe. its easy to change.

    Jan 04, 2009 | 1992 Cadillac DeVille

    1 Answer

    1992 Cadillac deville heater bypass


    the easiest way to by-pass the heater core is to take off both hoses at the fire wall and use a piece of hard tubing to insert in both hoses and use hose clamps it's quick and easy and should get you by. make sure you top off the coolant and do this with engine cold.

    Aug 28, 2008 | 1992 Cadillac DeVille

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