Vehicle & Technical > Defender

Exhaust system blowing 300tdi

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davidlandy:
Cheers Chris

I have opted for the safe (but more expensive) route and gone for the same part again.

Think u are right about MOT requiring one

thanks Dave

matthew:
Having had a browse through

http://www.motuk.com

I can't see any requirement for the MOT that you should have a catalyst at all, only that you need to be able to pass the relevent emmissions test. Construction and Use regs may well require that a catalyst is fitted though.
I'd go and ask a MOT test station, especially with that amount of difference.

hobbit:
With thought to removing the cat, if it has no sensor on it, you should be ok, as that sensor will hook up to the engine management system (if fitted), and that could be tested by unplugging the sensor and seeing what happens.

Cats for diesels came in later than petrol, still not sure if they are mandatory or not, got to get my mates book out to check.

But surely of there is no prob with engine management, fitting a normal pipe for everyday, and keep a cat for mots would work, buy one between yourselves if it is the same cat, and share it.. :wink:  :wink:  :wink:

Kev

Porny:
I know it does not help now, but....

Your Landy does not need the cat; I would have just gone for the no-cat option!

I might stand corrected, but I don't think the 300 Tdi runs a Lambda type sensor, unless it is a late model with the fly by wire controls rather than a cable.  Removing the cat will not have any effect on the EGR.

If the system is fitted with a sensor, then you could have had a boss made up and welded it into the new non-cat pipe! Any exhaust sensor does not need a CAT to work.

Personally, I would remove the EGR set up too or at least block it off.  Without the cat and the EGR, a 300Tdi goes much better.  
My parent’s 300Tdi disco has neither as standard!


Ian


Edited: Just been reading up on the late spec 300 Tdi's and they do not have a lambda or any other type of sensor in the exhaust, which means a non-cat pipe, would be a straight replacement!  
The cat was only initially fitted to some markets that required improved exhaust emissions, and was later carried over to UK spec models.

As far as I am aware, a Cat is not needed for the MOT as a diesel only undergoes a visual smoke check.
In reality, the CAT fitted to 300TDi's is very basic and mainly acts as a soot trap.

I'd personally safe myself over £200 and get the non-cat pipe

davidlandy:
Ian

where were u 2 days ago?? ohhh bummer

well at least it wont smoke as much!!  .........and im doing my bit for the enviro-thingy

dave

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