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Removing cat from exhaust
Posted: Thu Jul 19, 2007 5:17 pm
by benzbod
My E30 318i cabrio just passed the MOT, but the emissions readings were crazy. 0.00% CO, and 1ppm hydrocarbons. The exhaust was excessively hot, and the examiner, and my tame mechanic, suggest that the cat is blocked. However, the car is a 1991, pre compulsory cat vehicle, so I would prefer to do away with the cat. Any comments and advice, and how do I by pass the Lamda/Oxygen sensor?
Posted: Thu Jul 19, 2007 9:03 pm
by Simon
You can replace the cat section, but keep the lambda probe fitted.
Replacing the cat section with a standard section will be a lot cheaper too.
Re:
Posted: Thu Jul 19, 2007 10:45 pm
by Brianmoooore
Take the exhaust off and smash the cat up with a steel rod up the pipe, then pour it out in pieces. This is common practice on LPG powered cars.
Re:
Posted: Fri Jul 20, 2007 6:38 pm
by stickupkid11
the car doesnt need a cat if its registerd befor 1992, as for knocking the blocked cat out i have done that time and time again each time it makes the exhaust sound like s**t.
Re:
Posted: Fri Jul 20, 2007 6:51 pm
by Brianmoooore
Doesn't need a cat if it's registered after 1992 either, if you run it on LPG.