Diesel catalysts

davewithington · Unread post by **davewithington** » 22 May 2011, 18:49

I'm confused. When I was underneath today, I noticed corrosion on my exhaust box - not enough to need replacement, but it got me thinking about replacement costs.

Looking on the net, most suppliers list the Xantia TD as having a catalyst, but I wouldn't have expected my 1993 car to have one, and I can't see one on the pipe.

Not fitted to diesels are they?

wright · Unread post by **wright** » 22 May 2011, 18:52

eu reg since 1992 that petrol cars had to have a cat, not sure about diesels

Xaccers · Unread post by **Xaccers** » 22 May 2011, 19:00

Later diesels including the Xantia were fitted with cats.
Cassy had one when I first got her.
When it came time to replace that pipe, I just picked a cat less one from an earlier model.
Was something like £35 plus postage, from online automotive.

It's not a legal requirement for diesels, so definitely get the catless pipe.

davewithington · Unread post by **davewithington** » 22 May 2011, 19:17

That's what I thought Xac.

Unread post by **Dommo** » 22 May 2011, 19:23

My '97 1.9TD has one straight pipe with no cat or box from the turbo right up to the back box.. Nice and cheap should it need replacing!

davewithington · Unread post by **davewithington** » 22 May 2011, 21:10

I've been looking at prices - definitely cheap, not much more than an exhaust for the 2CV

citronut · Unread post by **citronut** » 23 May 2011, 12:59

not only cheap but if your car has a cat and you de/cat it, you will be amazed at the diference in get up and go,

i too have de/catted my R reg 1.9TD,

regards malcolm

Gregg1100 · Unread post by **Gregg1100** » 23 May 2011, 15:08

Got my straight through cat less pipe from GSF. Car is far better and more economical too.

allanmc · Unread post by **allanmc** » 01 Jun 2011, 10:13

I have a wee question about whether you need a cat or not, my son has a 2005 Puegeot 406 110 hdi which needed an exhaust system and the garage told him that it had to have a cat, I have a 2000 Xantia 110 hdi and have been told that I dont need one can someone clarify this for me please.
allan

Unread post by **RichardW** » 01 Jun 2011, 12:21

No MOT requirement (yet) for diesels to retain their catalysts. If the 406 is fitted with a FAP however, then removing it is a bit more involved then just chopping the cat out a la earlier cars.... Possible though that there is no de-cat pipe for a 406, but a few minutes with angle grinder and MIG should see to that if you can get a straight pipe of the right diameter

Unread post by **citroenxm** » 01 Jun 2011, 12:47

DERVs - certainly earlyer ones, in the 8v HDi houses do NOT need a Cat, My 1999 V reg HDi is De-cat-ed.. and the emmisions - well - smoke test was stunningly low...

Mines had the "Mig and straight pipe" job done to it also... you can tell, the "Added" pipe has rusted much quicker then the rest of the pipe...

Paul

citronut · Unread post by **citronut** » 01 Jun 2011, 12:57

i think it depends realy how much the electronics rely on the in/output readings of the cat and asociated sensors,

basicly i belive the newer diesels require it just to keep them running happy,

regards malcolm

allanmc · Unread post by **allanmc** » 01 Jun 2011, 15:14

Thanks for getting back so quickly when mine needs an exhaust I wont be paying for a cat
allan

citronut · Unread post by **citronut** » 01 Jun 2011, 19:35

have a look here

http://www.catalogue.bosal.com/pages/ex ... del=Xantia

scroll down and you will see the straight through pipe

regards malcolm

bxzx16v · Unread post by **bxzx16v** » 01 Jun 2011, 19:51

Had a non-cat front pipe fitted to my 1.9td Xantia a few years ago and it ran like a dream , recently had a stainless system fitted to a 1.9jtd fiat doblo van and that was awesome , the jtd is a fantastically good engine to start but with the decat it was very nippy

Mark