Cats saga continued 95 sport 90 q

[Chris Newbold]

On Sun, 2001-11-04 at 18:31, John Stanton wrote:

> was steering me away in favor of using OEM parts.  The units are rattling at
> start up and upon deceleration from time to time.  It is getting annoying at
> this point.  Question is how long before annoying turns into extreme back
> pressure problem?  Anyone ever ream them out, poorly for off road use only?

On my '93 90 (now departed) I had the pleasure of blowing out both the
left and right cats. I replaced the left pretty quickly when it started
rattling (to my dismay at about 52k miles, 2k past the Federal mandated
warantee period).

About a year ago the right started to go, and I just ignored it because
we had just had a baby and I didn't want to deal with the downtime. I
took it to my tech last spring (so about 4-6 months later) and after
torching the old one off, we found it to be empty.

The ceramic core had broken up and most of it was hopelessly lodged in
the nether regions of the exhaust and the rear mufflers. Major
backpressure.

So I drove it about another month and then traded it on a 2001 S4 Avant
:-).

(BTW, I've still got that replacement right-side cat which I bought from
Discount Converters. If you're interested contact me off-list.)

-Chris
2001 S4 Avant 6spd