Thread: 2003 Defender Exhoust Problem

Originally Posted by tombraider

Dump the stupid thing... Cats have no place on offroaders...

Off to the exhaust shop... throw 3" of pipe from the turbo down....

I have spend some time today talking to three different exhaus places in Melbourne regarding my problems with Catalytic Converter Heating up the cabbin. One told me that they will look at it but as far as removing it, then its a no no. Another told me that it is an offence to remove cats, and that I can be sluged $5000 and that whoever removes it can also be fined $35000.

Same person also told me something that really confused me and I really would appreciate some technical input on this regardless of legalities.

He said that removing a cat will cause the car to burn mutch more fuel as the engine sensors will detect increase in air flow and and the management system will start dumping lot more fuel. I have always thought that when you increase air flow both into and out of the engine, that it can only be good and improve power as well as economy as the engine can breathe mutch easier. I'm not a mechanic so can someone who knows what they are talking about shed some light on this help me decide what I should do - PLEASE!

Originally Posted by Graeme

I tried this at a local shop and got an ear-bashing - lucky to get away alive. Does anyone know from where I can get one already made to suit the Disco? I'd like 3" from the turbo mating up to the original muffler.

Ring taipanXp and get a complete system from them sent to you then just bolt it up.

And YES they do work...

Originally Posted by marek

I have spend some time today talking to three different exhaus places in Melbourne regarding my problems with Catalytic Converter Heating up the cabbin. One told me that they will look at it but as far as removing it, then its a no no. Another told me that it is an offence to remove cats, and that I can be sluged $5000 and that whoever removes it can also be fined $35000.

Same person also told me something that really confused me and I really would appreciate some technical input on this regardless of legalities.

He said that removing a cat will cause the car to burn mutch more fuel as the engine sensors will detect increase in air flow and and the management system will start dumping lot more fuel. I have always thought that when you increase air flow both into and out of the engine, that it can only be good and improve power as well as economy as the engine can breathe much easier. I'm not a mechanic so can someone who knows what they are talking about shed some light on this help me decide what I should do - PLEASE!

The guys full of it...

If no-one will do the job for you just get a pipe from an earlier TD5 and fit that.

Cheers
Mike

What the exhaust shop is saying is true,totally illegal to remove a cat converter.BIG FINES FOR BOTH THE OWNER AND SHOP!!!!
Is the Defender a european delivery???? Didnt think we have cats on ours.
As Tombraider says,if a shop wont touch it,buy the non cat aftermarket kit and DIY.If ever questioned,"it was like it when I got it"
Andrew

I purchased an engine pipe off a pre 2002 TD5 wreck and replaced the cat pipe. So know one knows the difference. Certainly takes a heap of heat out of the floor.

Originally Posted by lrdef110

I purchased an engine pipe off a pre 2002 TD5 wreck and replaced the cat pipe. So know one knows the difference. Certainly takes a heap of heat out of the floor.

Have you noticed any changes in fuel economy after cat was gone?

Increase / Decrease / No change?

Never really thought about that one, but I can't remember noticing any difference. Happened about the same time the ECU was rechipped and Tombraiders intercooler added so it would be difficult to tell anyway.