i have a 1988 olds. delta 88, 3.8,and it has a long intermediate pipe on it and the question i want to know,is if the pipe is rusty,not any holes,will it make a rattle noise,some people said if it gets too rusty inside,then it can rattle.i checked all the heat shields,all hangers and clamps and the pipe isnt hitting on anything,but it seems to rattle,when iam driving.would a rusty pipe cause that? and its got a new cat and muffler on it too.
It can cause a rattle if you have excessive rust. I would look at replacing the whole pipe. If it's rusted enough then you will want to replace it anyway. It's going to start getting holes soon.
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