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Author Topic: Cats  (Read 1556 times)

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m.ian

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Cats
« on: 09 June 2012, 13:31:22 »
Hi,
Does anybody know if I can use the cats off a 3.0 elite estate on my 3.2 elite estate?

Thanks
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tunnie

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Re: Cats
« Reply #1 on: 09 June 2012, 13:46:50 »
They will fit physically, but I think the 3.0 ones will be missing holes for pre-cat sensors? So guessing they will need to be retro fitted  :-\
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m.ian

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Re: Cats
« Reply #2 on: 09 June 2012, 14:00:58 »
Oh well, worth asking anyway :(
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Jimbob

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Re: Cats
« Reply #3 on: 09 June 2012, 15:04:41 »
Im about to do this actually, they are better than the 3.2 ones..

Apparently you need to drill and weld a boss for the 2nd lambda sensor, and also shave about 5mm off the flange that attaches to the manifold.
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TheBoy

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Re: Cats
« Reply #4 on: 09 June 2012, 17:32:04 »
Unless they are actually failing garage emission tests, or are blowing, whats the gain?
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Jimbob

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Re: Cats
« Reply #5 on: 09 June 2012, 17:44:53 »
mine are blowing, failing emissions, and rattling internally, badly....
and I had a pair of 3.0's = no brainer :y
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TheBoy

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Re: Cats
« Reply #6 on: 09 June 2012, 17:49:25 »
Unusual fault. Have your landings been harsh after launches?
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Jimbob

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Re: Cats
« Reply #7 on: 09 June 2012, 19:06:56 »
;D

had the old 420 / 430's as long as ive had the car....never been able to keep them off more than a 1-200 miles, now 10-20 miles!
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TheBoy

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Re: Cats
« Reply #8 on: 09 June 2012, 19:10:30 »
Quote from: Jimbob on 09 June 2012, 19:06:56
;D

had the old 420 / 430's as long as ive had the car....never been able to keep them off more than a 1-200 miles, now 10-20 miles!
But that code is easily cleared for less hassle than fitting 3.0l cats.  If the main cats are working (by garage emissions test), I'd stick with the 'proper' cats :)
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Jimbob

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Re: Cats
« Reply #9 on: 09 June 2012, 19:19:58 »
was a struggle last mot, due again in a few weeks...

the rattle, and noise  is driving me mad too


and yes, I can reset em...but 3 times a day!  nah they is breaked.
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GmasterT

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Re: Cats
« Reply #10 on: 09 June 2012, 23:06:21 »
3.2 has stupid pre cats so 4 in all and a lambda after each one (iirc) so 4 again. You will need to move the pre cat lambdas to behind the 3.0 cats and hope that's enough for it to be happy as they are fussy enough about the pre cats not being 100%. Should be ok though :)
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Brikhead

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Re: Cats
« Reply #11 on: 09 June 2012, 23:29:21 »
Quote from: Jimbob on 09 June 2012, 19:06:56
...had the old 420 / 430's as long as ive had the car....never been able to keep them off more than a 1-200 miles, now 10-20 miles!
My 2.6 was showing those codes when I first got it, it seems a good thrash and decent petrol may help.

Quote from: GmasterT on 09 June 2012, 23:06:21
3.2 has stupid pre cats so 4 in all and a lambda after each one (iirc) so 4 again. You will need to move the pre cat lambdas to behind the 3.0 cats and hope that's enough for it to be happy as they are fussy enough about the pre cats not being 100%. Should be ok though :)
3.2 and 2.6 both share the same set-up regarding 4 lambdas.

I'm just about to scrap a full set of 2.6 catalytic convertors, I'm just waiting for a break in the rain so as I can remove them.
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