P0430 Failed Cat - Confirmed?

[itsnotanova]

I've always thought that driving with a weak/bad AOS leads to an early death for the cats. Penetrating lube and some heat works pretty good to loosen the bolts up. I also recommend not using an air tool to remove them. You need to take it slow so you can feel if they're not turning. Sometimes tightening the bolt before loosening helps. I've also had to go back and forth a few times.

[pilot4fn]

PErfect. Thanks for the encouragament
I'll do the exhaust swap probably in a couple of weeks whaen time allows... Hopefully the bolts open without too much of hassle.
I have done several engines, including changing exhaust bolts but those previous ones have been steel blocks (not aluminium)e

Originally Posted by itsnotanova

I've always thought that driving with a weak/bad AOS leads to an early death for the cats. Penetrating lube and some heat works pretty good to loosen the bolts up. I also recommend not using an air tool to remove them. You need to take it slow so you can feel if they're not turning. Sometimes tightening the bolt before loosening helps. I've also had to go back and forth a few times.