Question about 1997 Buick Skylark

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Coolant drain plug on engine block

Does anyone know where the drain plug is on the engine block 2.4L. I want to fully drain the cooling syatem before flushing and refilling.

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There is no drain plug on the engine block unfortunately, however taking the lower radiator hose off will drain almost all the coolant out off the block. then reconnect the lower hose and fill completely with just water and flush solution let sit for a few minutes. then take lower hose off again let it completely drain. reconnect lower hose and fill with 60/40 mix of coolant this will protect to -40 degrees F. when you have it completely full keep cap off radiator and start vehicle turn your heater on hot and the fan to high. top off with coolant and replace cap. there should be no need to bleed system of air. please rate this solution.

Posted on Aug 30, 2008

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Your thermostat may be stuck - keeping it from opening / opening fully. You can test it be removing it and dropping it into a pot of boiling water on your stove - it should open in water that hot.

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A diagram of the flushing of a radiator and block of a chevrolet blazer LS 2000


Theres no such thing as a diagram, here are the draining instructions, hope this helps...
  • 1-Place a large drain pan beneath the radiator drain plug. The drain plug is located on the passenger side at the very bottom of the radiator on the engine side.

  • 2-Make sure the engine is cool. Open the hood of the truck and remove the radiator cap.
  • 3-Loosen the drain plug. On the 2000 Blazer, the drain plug is a wing-nut type of plug. Twist it with your fingers until the coolant begins to drain.

  • *To flush the block, once you have drained the radiator, run the engine for a bit untill the temp gauge goes up to normal, then the coolant will have been evacuated from the block. DO NOT leave the engine on, once it reaches normal temp, (this will happen quick) turn off right away, otherwise you'll be forking out a few hundred $$$ to fix the worped heads.
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  • Read more: How to Drain a Radiator From a 2000 Chevy Blazer ' eHow.com http://www.ehow.com/how_6357264_drain-radiator-2000-chevy-blazer.html#ixzz1VS4RBufX

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    Water pump removal/installation 7924vg20.gif

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    prev.gif next.gif

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    hello. on the drivers side of radiator is a drain. here is a picture and the instructions for draining the coolant out.



  • Install a tube on the radiator drain. Place the end of the tube in the drain pan.
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    Where is the thermostat sensor


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    I Suspect that you have AIR in your COOLING SYSTEM Fallow Procedures BELOW to Insure there is NO AIR IN COOLING SYSTEM


    Draining and Filling Cooling System

    Draining Procedure

    Important: Do NOT add any engine coolant supplement sealant pellets to the cooling system. Drain and refill the engine cooling system every 5 years or 240,000 km, (150,000 mi) , whichever occurs first.

    1. Park the vehicle on a level surface.
    2. Remove and clean the coolant recovery reservoir.
    Caution: Refer to Radiator Cap Removal Caution in Service Precautions.

    1. Remove the radiator cap when the engine is cool:
    3.1. Slowly rotate the cap counterclockwise to the detention tab. Do not press down while rotating pressure cap. 3.2. Wait until any residual pressure, indicated by a hissing sound, is relieved. 3.3. After all hissing stops, press down on the radiator cap and rotate the cap counterclockwise in order to remove the cap.
    Important: Recover and store used coolant in a used coolant holding tank and submit the used coolant for recycling on a regular basis. Do NOT pour used coolant down the drain. Ethylene glycol antifreeze is very toxic. Disposing of ethylene glycol into the sewer system or ground water is both illegal and ecologically unsound.

    1. Place a drain pan under the radiator drain valve in order to collect all of the used coolant.
    2. Open the radiator drain valve located at the bottom of the radiator tank. If only partial cooling system draining is required, drain enough coolant to perform the procedure.
    3. Open the air bleed valve on the thermostat housing 2 full turns
      1. Open the air bleed valve above coolant pump 2 full turns.
      2. Place a drain pan under the engine block drains in order to collect the used coolant.Important: Allow the coolant to drain completely.

        1. Remove both of the engine block drains.
          • The front left engine block drain is located between the starter motor and the engine oil filter.
          • The rear right engine block drain is located near the crankshaft position sensor.
        Filling Procedure
        Reinstall the engine block drains
      3. Close the radiator drain valve,
        1. Install the coolant recovery reservoir. Notice: When adding coolant, it is important that you use GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL coolant. If Coolant other than DEX-COOL or HAVOLINE DEX-COOL is added to the system the engine coolant will require change sooner; at 50,000 km (30,000 mi) or 24 months.
        2. Slowly add a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water to the radiator until the coolant level is at the base of the radiator fill neck.
        3. Wait for 2 minutes and reinspect the level of the coolant in the radiator. If necessary, add coolant to the radiator until the coolant level is at the base of the radiator fill neck.
        4. Install the radiator cap.Ensure that the radiator cap arrow points toward the radiator overflow tubeImportant: The air bleed valves are brass. Do NOT over-tighten the air bleed valves.

          1. Close the air bleed valve above the coolant pump.
            1. Close the air bleed valve on the thermostat housing.
            2. Fill the coolant reservoir with a 50/50 mixture of GM Goodwrench DEX-COOL or HAVOLINE DEX-COOL and clean, drinkable water. Caution: Refer to Radiator Cap Removal Caution in Service Precautions. Important: If the coolant temperature indicator turns ON, turn the engine OFF immediately and allow the engine to cool. Do NOT remove the radiator cap.
            3. Start the engine and allow the engine cooling fan to cycle on and off 3 times. If the low coolant indicator does not turn OFF and the coolant level is above the Full Cold mark on the coolant recovery reservoir, refer to Engine Coolant Temperature Gage Inaccurate or Inoperative.
            4. Turn off the ignition.
            5. Allow the engine to cool.
            6. Ensure that the engine coolant concentration is sufficient.

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