Catalytic Converter Gasket Replacement

By @ 01/06/14 in Automotive, Miata

I detected an exhaust leak and traced it to the gaskets of my catalytic converter. They were completely toast and the bolts were in almost the same shape. Thanks, road salt!

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Glad the garage is so roomy…

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Here’s the forward flange of the Cat.

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The gasket is clearly in rough shape — you can even see in the middle where exhaust gas has been escaping.

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When I got the rear flange apart, there clearly wasn’t much left of that gasket!

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eesh

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After some filing and sanding to get the flanges on the mid-pipe and down-pipe sides as nice as I could without taking them off the car, it was time for the new hardware. It’s all stainless because I believe in doing things right, not twice (if i can afford it).

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It ain’t pretty, but it should seal.

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I learned about that orange copper gasket-maker stuff on FSAE and it’s great for making the best of a less-than-ideal exhaust flange situation.

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I hope not to have to touch these again anytime soon

Backdate – 1/5/2013


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