Edmunds Answers

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  • avatar zaken1 06/06/09 10:17 pm PST

    I agree with Tony; white smoke means either a leaking head gasket or a cracked head. The smoke is coming from coolant that is being pulled into the motor and burned in the cylinders. The repair would involve removal of the cylinder head(s) and either remachining the head or replacing it. That is a very expensive repair; at least $500 and possibly twice or three times that much.

    Sometimes a head gasket leak can be sealed without taking the motor apart; by using a chemical sealer designed to seal cracked heads and blocks. Most common stop leak products will not work for this purpose. You need a product specifically designed to seal cracked heads and blocks. The two products I can recommend are Irontite Ceramic Motor Seal, or K&W Metallic Block Seal. These products cannot be used in antifreeze; so the cooling system will have to be drained, thoroughly flushed, and then filled with water. At that time; the sealer should be added, according to its instructions. The car should be run as long as specified; and the sealer left in the system for a few days. Then the system should be drained and refilled with a 50-50 mixture of antifreeze and distilled water. Be sure to check and top up the radiator level after the first time the engine cools down; since there probably will be trapped air that works out of the system and causes the level to drop. It is a good idea to keep checking the fluid in the radiator (not just in the plastic bottle) until the level stops dropping.

Answers

  • tony78 06/06/09 6:47 pm PST

    So,,What you are saying is that is that you gave the car a tune up and the engine shakes,,while it is sitting still.

    And when you drive down the road,,it still shake,,just less than when it is sitting still.

    To answer your question,,i can't say for sure if the converter is bad but the clouds of white smoke wolud lead me in the direction of a blown head gasket.


  • zaken1 06/06/09 10:17 pm PST

    I agree with Tony; white smoke means either a leaking head gasket or a cracked head. The smoke is coming from coolant that is being pulled into the motor and burned in the cylinders. The repair would involve removal of the cylinder head(s) and either remachining the head or replacing it. That is a very expensive repair; at least $500 and possibly twice or three times that much.

    Sometimes a head gasket leak can be sealed without taking the motor apart; by using a chemical sealer designed to seal cracked heads and blocks. Most common stop leak products will not work for this purpose. You need a product specifically designed to seal cracked heads and blocks. The two products I can recommend are Irontite Ceramic Motor Seal, or K&W Metallic Block Seal. These products cannot be used in antifreeze; so the cooling system will have to be drained, thoroughly flushed, and then filled with water. At that time; the sealer should be added, according to its instructions. The car should be run as long as specified; and the sealer left in the system for a few days. Then the system should be drained and refilled with a 50-50 mixture of antifreeze and distilled water. Be sure to check and top up the radiator level after the first time the engine cools down; since there probably will be trapped air that works out of the system and causes the level to drop. It is a good idea to keep checking the fluid in the radiator (not just in the plastic bottle) until the level stops dropping.

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