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Author Topic: V6 catalytic converters - difference between 2.6 and 3.2  (Read 4034 times)

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johnnydog

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V6 catalytic converters - difference between 2.6 and 3.2
« on: 24 January 2016, 22:30:11 »
Although I recently asked this in conjunction with a relevant but different topic, no one come up with any answer, so I thought I'd put in a topic of its own.....
I know they are not available new anymore, but Vauxhall list 2.6 and 3.2 cats with different part numbers, although aftermarket such as those made by cats2u and BM cats list them with the same part number.
I know the after market list some parts as 'one fits all' for all models, whereas VX may have various part numbers, but does anyone know the actual difference between the VX 2.6 and 3.2, and has anyone had experience of fitting 2.6 cats to a 3.2 without issues?
TIA

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05omegav6

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #1 on: 24 January 2016, 23:36:06 »
The difference might actually be manual or auto, and relates only to the position of the rear lamda sensors :-\
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johnnydog

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #2 on: 24 January 2016, 23:51:26 »
VX gave me the relevant part numbers from my registration numbers; both of which are autos.....
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05omegav6

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #3 on: 25 January 2016, 00:06:19 »
Quote from: johnnydog on 24 January 2016, 23:51:26
VX gave me the relevant part numbers from my registration numbers; both of which are autos.....
Cat volume perhaps then  :-\
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joff

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #4 on: 25 January 2016, 02:49:59 »
Quote from: Harris K Telemacher on 25 January 2016, 00:06:19
Quote from: johnnydog on 24 January 2016, 23:51:26
VX gave me the relevant part numbers from my registration numbers; both of which are autos.....
Cat volume perhaps then  :-\

Going back a few years now but I'm sure dealers told me the cats on the Police Omega's are different to standard ? was that due to them being manual cars ? ???
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05omegav6

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #5 on: 25 January 2016, 03:15:21 »
Quote from: joff on 25 January 2016, 02:49:59
Quote from: Harris K Telemacher on 25 January 2016, 00:06:19
Quote from: johnnydog on 24 January 2016, 23:51:26
VX gave me the relevant part numbers from my registration numbers; both of which are autos.....
Cat volume perhaps then  :-\

Going back a few years now but I'm sure dealers told me the cats on the Police Omega's are different to standard ? was that due to them being manual cars ? ???
The manuals have shorter rear lamda looms iirc... might simply be due to the different box proportions :-\

Plod ones might be higher volume :-\
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Andy H

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #6 on: 25 January 2016, 06:37:16 »
Quote from: joff on 25 January 2016, 02:49:59
Quote from: Harris K Telemacher on 25 January 2016, 00:06:19
Quote from: johnnydog on 24 January 2016, 23:51:26
VX gave me the relevant part numbers from my registration numbers; both of which are autos.....
Cat volume perhaps then  :-\

Going back a few years now but I'm sure dealers told me the cats on the Police Omega's are different to standard ? was that due to them being manual cars ? ???
I was told the same. We decided that they probably had some extra protection for going 'off road' :-)
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johnnydog

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #7 on: 25 January 2016, 08:59:24 »
The Police spec cats were a different VX part number again from the standard 2.6 auto and 3.2 auto. I think the Police aspect has thrown a spanner the issue - I really wanted know the difference between a 2.6 auto and 3.2 auto cat for a standard (not Police) car because VX list different part numbers.
I also wanted to know therefore if anyone had successfully fitted genuine VX cats from a 2.6 onto a 3.2 without any issue, or if anyone knows whether it may trigger lambda faults as a result if the difference is the composition of the precious metal internally. As you know, the lambda sensor part numbers are the same for 2.6 autos and 3.2 autos........
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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #8 on: 25 January 2016, 09:10:08 »
2.6 and 3.2 downpipes full interchangeable.
 plod 3.0 ones had different cell count, and thicker box.
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johnnydog

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #9 on: 25 January 2016, 10:16:28 »
Quote from: biggriffin on 25 January 2016, 09:10:08
2.6 and 3.2 downpipes full interchangeable.

In that case, why is the VX part number different for the two auto (non Police) 2.6 and 3.2 models?
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05omegav6

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #10 on: 25 January 2016, 11:34:14 »
Could it be that to counter the pre cat issues, they replaced the 2.6/3.2 cats for plod ones?
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johnnydog

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #11 on: 25 January 2016, 12:45:13 »
I don't know where the Police cats come into this saga!!!!!!
The standard VX cats for auto 2.6 and auto 3.2 are different part numbers; the lambda sensors are the same for both; however Police spec VX cats are a different part number again.
Forget Police spec cats as that is not what I am asking!!!!!
I am asking if anyone actually knows (rather than educated guesses, which I appreciate, but...not what I need to know) the actual difference between the VX 2.6 auto and 3.2 auto cats - not interested in the Police spec ones!!!!
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05omegav6

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #12 on: 25 January 2016, 14:13:52 »
Quote from: johnnydog on 25 January 2016, 12:45:13
I don't know where the Police cats come into this saga!!!!!!
The standard VX cats for auto 2.6 and auto 3.2 are different part numbers; the lambda sensors are the same for both; however Police spec VX cats are a different part number again.
Forget Police spec cats as that is not what I am asking!!!!!
I am asking if anyone actually knows (rather than educated guesses, which I appreciate, but...not what I need to know) the actual difference between the VX 2.6 auto and 3.2 auto cats - not interested in the Police spec ones!!!!
Ring the factory and ask...

Might also help if you posted the respective part numbers, as you might find that there are actually six different numbers for the later dbw v6  ;)
« Last Edit: 25 January 2016, 14:15:24 by Harris K Telemacher »
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TheBoy

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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #13 on: 25 January 2016, 18:24:24 »
24456830  8 54 079 PIPE, EXHAUST, FRONT, WITH CATALYST, LH Y26SE[LY9]      1   
24456829  8 54 078 PIPE, EXHAUST, FRONT, WITH CATALYST, RH Y26SE[LY9]      1   
24461727  58 54 413 PIPE, EXHAUST, FRONT, WITH CATALYST, LH (EXCEPT POLICE VEHICLE) (CORE RETURN NO.) Y32SE[LA3]      1
24461726  58 54 412 PIPE, EXHAUST, FRONT, WITH CATALYST, RH (EXCEPT POLICE VEHICLE) (CORE RETURN NO.) Y32SE[LA3]      1   
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Re: V6 catalytic converters - difference between 2.6 and 3.2
« Reply #14 on: 25 January 2016, 18:50:56 »
 Mr telemaker as you have both, types, off you go, it's all for research, and fair play. :)

I can't check as I have 3.0L plods on my 3.2  :o
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