Originally Posted by dburt
Cats are spendy, finicky, and don't seem to have a long life, much less 9 lives.
I am throwing the flag on the field on this one...
My 3126 B had almost 900,000 miles on it before I replaced it. ECM said it had over 2,000,000 idle hours alone.
Rebuild versus buying a good used motor is tit for tat. If you do 1 cylinder, you may as well do all while you have it apart. (Do you change brakes on one side of your vehicle at a time??? ;) )
Buy a rebuild kit for your injectors while you have them pulled too.
I had a #3 cylinder malfunction, scratched the sleeve due to no fuel being injected, replaced the motor with a 300 HP 3126B, originally it was a 250 HP. To replace a sleeve was about 2/3 the cost of a new motor, and now I have the old one to rebuild for a spare. (You can always sell it later for a profit!)
And I was replying to a post of the post of the post!