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Exhaust Question

r34 gt25

By r34 gt25,
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r34 gt25

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hey guys hope someone can help me with this one, how do i know if my cat is on its way out my exhaust sounds like its ticking i wanna get a cat back but cant afford to at the moment. also when i turn the car off it the exhaust ticks when its still hot what is that.

cheers

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GeeTR Grand Master

GeeTR

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Has it always ticked, or only recently started? Ticking is normal, the metal exhaust wants to expand and contract when it heats and cools. As the flanges bolt togethor hard, preventing even growth, they'll rub up against each other, making the ticking noise. Like a metal shed or roof as clouds go over head.

Rattling could be a loose baffle in the muffler, or garbage in the cat (too big to go through the matrix)

r34 gt25 Collaborator

r34 gt25

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Does it stop ticking when it warms up? Get under your car and hit it a bit. If it rattles you know it's going/gone. Mine had the same problem, except the cat is silent when i hit it? :laugh:

nah it doesnt stop ticking and would that be the reason the exhaust sounds like its ticking on acceleration

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