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Could replacing the timing belt cause problems with catalytic converter?
Wiki User
∙ 12y ago
Yes, if the timing was not set properly when replacing the belt then the exhaust valves open at the wrong point in the cycle. This will cause the catalytic converter to be dealing with gasses that are outside of the normal parameters. Either unburnt hydrocarbons or the valve opening before combustion is completed, either way it will get very hot, and potentially melt the innards and potentially plug the exhaust.
The timing mishap can be due to the cams moving when you removed the old belt, or the new belt not being put on in the right order so the slack ends up at the idler pulley.
Wiki User
∙ 12y ago
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Can bad engine timing make a catalytic converter go bad?
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