Question about 1988 Cadillac Sedan DeVille

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88 cadillac squirting coolant from bolt hole

I have an 88 Cadillac devile thats squirts coolant from a bolt and was wondering how to do that job

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That bolt hole apparently is passing into your cooling system (water jacket) , which is common.. To seal it, the bolt and hole must be clean and dry. Squirt or flush out with aerosol carb cleaner and while at the parts store pick up some Loctite brand Loc n Seal bolt thread sealer. The coolant level must be below the bolt hole or the sealer won't take. Put some on the bolt thread and install bolt and tighten. Give the sealer 30 minutes to set up and refill the cooling system. Loc n seal is the blue loctite and comes in a small tube. fill the threads but don't waste the expensive woder. It is a liquid and will spread evenly as you screw the bolt in. Done deal. Good Luck. - Ned

Posted on Jun 21, 2009


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Per Chilton's Repair Manual: You're dealing with aluminum so pay careful attention not to exceed recommended torque.

4.5L And 4.9L Engines
  1. Disconnect the negative battery cable.
  2. Drain and recycle the engine coolant.
  3. Remove the air filter assembly. Disconnect and remove the coolant recovery tank.
  4. Disconnect and remove the cross brace.
  5. Remove the water pump pulley bolts.
  6. Remove the serpentine drive belt and the water pump pulley.
  7. Remove the water pump-to-engine bolts and the pump.
84203050.gif Water pump assembly—4.5L and 4.9L engines
To install:
  1. Clean the gasket mounting surfaces.
  2. Place a new gasket over the water pump studs.
  3. Install the water pump. Tighten the water pump bolts as follows:
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    3. Hex head bolts to 30 ft. lbs. (40 Nm)
    4. Remaining hex head bolts to 5 ft. lbs. (7 Nm).
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  5. Install the serpentine drive belt.
  6. Tighten the water pump pulley bolts to 22 ft. lbs. (30 Nm).
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  9. Connect the negative battery cable.
  10. Fill cooling system and check for leaks. Start the engine and allow it to come to normal operating temperature. Recheck for leaks. Top-up the coolant.

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