Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Jimbob on 13 October 2011, 19:07:16

Title: Cat Differences
Post by: Jimbob on 13 October 2011, 19:07:16

Anyone actually compared the Cat's from a 3.2 and a 2.6?

I can see they have different part numbers, but wonder what the actual difference is, and wonder if thats why the 3.2's are more prone to the cat efficency codes.

Title: Re: Cat Differences
Post by: Kevin Wood on 13 October 2011, 19:08:23

Interesting... I had assumed they were the same. It would indeed be good to know what's different.

Title: Re: Cat Differences
Post by: Jimbob on 13 October 2011, 19:16:20

Yes..

My idea being, Im about to fit a new exhaust, would a lower mileage 2.6 or 3.2 cat be an idea to fit at the same time to help the issue (alongside masking it by moving the sensors)
plus I know I have 4 studs to drill out, maybe a replacement would be easier....

Title: Re: Cat Differences
Post by: Darth Loo-knee on 13 October 2011, 19:20:53

It could be an idea to move the O2 sensors before fitting them  ;) save any trouble later :-*

Title: Re: Cat Differences
Post by: albitz on 13 October 2011, 19:21:07

Thought they were the same tbh. :-\

Title: Re: Cat Differences
Post by: TheBoy on 13 October 2011, 19:36:06

I thought they were the same  :-\

Remove the cats, drill out studs, move the lamdas at same time, pop back in, jobs a good'un

Title: Re: Cat Differences
Post by: RobG on 13 October 2011, 19:37:45

Maybe part number for 3.2 refers to plod spec frontpipes :-\

Title: Re: Cat Differences
Post by: kcl on 13 October 2011, 20:23:22

Quote from: RobG on 13 October 2011, 19:37:45

Maybe part number for 3.2 refers to plod spec frontpipes :-\

And the plod spec difference on a catalytic converter would be exactly... what?

Are the exhaust manifolds different on a 3,2? MAybe some difference in diameter or bolt holes  :-\

Title: Re: Cat Differences
Post by: albitz on 13 October 2011, 20:37:59

Pretty certain that 2.6 fanimolds are the same as 3.2 in fact I believe the engine ECU may well be even the same.

Title: Re: Cat Differences
Post by: Jimbob on 13 October 2011, 20:44:00

 924456830 8 54 079PIPE, EXHAUST, FRONT, WITH CATALYST, LHY26SE[LY9]   1

 1024456829 8 54 078PIPE, EXHAUST, FRONT, WITH CATALYST, RHY26SE[LY9]   1

 924461727 58 54 413PIPE, EXHAUST, FRONT, WITH CATALYST, LH (EXCEPT POLICE VEHICLE) (CORE RETURN NO.)Y32SE[LA3]   1

 -13125593 58 54 423PIPE, EXHAUST, FRONT, WITH CATALYST, LH, NEW EXCHANGE (IDENT GX) (FOR POLICE VEHICLE) (EXCEPT VAUXHALL) (CORE RETURN NO.)Y32SE[LA3]   1

 -R1620114 PIPE, EXHAUST, FRONT, WITH CATALYST, LH, NEW EXCHANGE (IDENT GX) (FOR POLICE VEHICLE) (FOR VAUXHALL) (CORE RETURN NO. C1620114)Y32SE[LA3]   1

 1024461726 58 54 412PIPE, EXHAUST, FRONT, WITH CATALYST, RH (EXCEPT POLICE VEHICLE) (CORE RETURN NO.)Y32SE[LA3]   1

 -13125592 58 54 422PIPE, EXHAUST, FRONT, WITH CATALYST, RH, NEW EXCHANGE (IDENT GW) (FOR POLICE VEHICLE) (EXCEPT VAUXHALL) (CORE RETURN NO.)Y32SE[LA3]   1

 -R1620113 PIPE, EXHAUST, FRONT, WITH CATALYST, RH, NEW EXCHANGE (IDENT GW) (FOR POLICE VEHICLE) (FOR VAUXHALL) (CORE RETURN NO. C1620113)Y32SE[LA3]

So 3  types....  2.6, 3.2 & Police...

So....anyone compared em?

Title: Re: Cat Differences
Post by: TheBoy on 13 October 2011, 20:51:58

I've seen a plod one glow before ::)

Title: Re: Cat Differences
Post by: Kevin Wood on 14 October 2011, 00:14:25

Quote from: TheBoy on 13 October 2011, 20:51:58

I've seen a plod one glow before ::)

I've seen the whole exhaust system up to the silencer on the Westfield glow. ;D

Title: Re: Cat Differences
Post by: Clarkey on 14 October 2011, 12:31:15

Have fitted a set from a 2.6 onto my 3.2. Bolted straight on with no problems. Compared both when off and could see no difference at all. Has passed NCT emissions test since with no probs. Didn't bother moving lambda sensors and have had no lights or codes either. Don't know why they bothered with different part numbers. Might be differences in back pressure but I've noticed no difference in driving mine.

Title: Re: Cat Differences
Post by: tunnie on 14 October 2011, 12:33:46

if they are identical, then why do the 3.2's have these code errors? Do 2.6 pre-cats last better because of less emissions?  :-\