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Christ · 11-26-2008, 11:53 PM

This also happens over a long period of short heating/cooling cycles, I'm sure.

I mean, seriously.. when I pulled my cat, it was so bad you couldn't see through most of the cells. I actually did a backpressure test through the O2 sensor port, and saw something like 2psi at idle. (Should have been less than .5psi.) This is what told me to pull the cat and visually inspect it.

Granted, that was for a cat nearly 20 years old, and newer ones aren't going to have that damage. But aren't they recommended to be replaced due to heating/cooling cycles damaging them after something like 4 or 5 years?

11-26-2008, 11:53 PM	#48 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	This also happens over a long period of short heating/cooling cycles, I'm sure. I mean, seriously.. when I pulled my cat, it was so bad you couldn't see through most of the cells. I actually did a backpressure test through the O2 sensor port, and saw something like 2psi at idle. (Should have been less than .5psi.) This is what told me to pull the cat and visually inspect it. Granted, that was for a cat nearly 20 years old, and newer ones aren't going to have that damage. But aren't they recommended to be replaced due to heating/cooling cycles damaging them after something like 4 or 5 years? __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"