Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: JamesV6CDX on 14 October 2007, 13:21:02
-
I just pulled up outside work, standing outside the car I thought - this exhaust sounds a bif "fruity" ! ::)
Looked under the car, and the mid-section pipe has completely corroded away where it joins the backbox - basically it's not even meeting the backbox, and the pipe is just wiggling free, fumes from the passenger bank are not even going through the rear silencer.
Question 1 - is this likely to be affecting the running / performance / economy of the car in any way at all?
Question 2 - Exhaust options. Am I right in thinking facelift exhaust is different to pre-facelift, and they are not interchangable?
-
Not really much help but I know the 3.2 is different as it has a different CAT setup.
I would have thought the Backboxes are all pretty similar, 3.2 has twin tailpipes but it's more cosmetic than anything else!
Oh and any holes in the exhaust will alter the back pressure which will alter performance and economy.
-
Hi James. I guess the detatchment of the pipe from the back box would be likely to affect performance to some degree. A few weeks ago all the wadding started blowing out of mine. Every time I went somewhere it looked like I had just run over a blonde, with the stuff trailing behind. I have noticed a decrease in performance and mpg but not to a serious degree. Not too familiar with the joint at the backbox. Is it a flange on a stub? Has the flange corroded on the centre section? This may mean a replacement centre section as well as the backbox.
-
Hi James. I guess the detatchment of the pipe from the back box would be likely to affect performance to some degree. A few weeks ago all the wadding started blowing out of mine. Every time I went somewhere it looked like I had just run over a blonde, with the stuff trailing behind. I have noticed a decrease in performance and mpg but not to a serious degree. Not too familiar with the joint at the backbox. Is it a flange on a stub? Has the flange corroded on the centre section? This may mean a replacement centre section as well as the backbox.
Oh yes.... it needs a whole new exhaust alright!!
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
-
I guess GM will be the way to go though, at twice this price >:(
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
Well dont suppose thats too painfull £131.22 inc VAT....... 8-)
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
Well dont suppose thats too painfull £131.22 inc VAT....... 8-)
Obviously that's plus delivery, plus DIY fitting, but it could be worse!
Suspect I will be persuaded to splash out on genuine GM parts though... ::)
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
Well dont suppose thats too painfull £131.22 inc VAT....... 8-)
Obviously that's plus delivery, plus DIY fitting, but it could be worse!
Suspect I will be persuaded to splash out on genuine GM parts though... ::)
Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... ;).......rather than give my hard earned to GM..... :-/
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
Well dont suppose thats too painfull £131.22 inc VAT....... 8-)
Obviously that's plus delivery, plus DIY fitting, but it could be worse!
Suspect I will be persuaded to splash out on genuine GM parts though... ::)
Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... ;).......rather than give my hard earned to GM..... :-/
There is no question of that - fitting I will do.
However, I think the parts may still need to be from GM.
-
From BuyPartsBuy:
GM173X £37.72 - drivers centre section
GM174W £35.6 - pass side centre section
GM175V £34.52 - Backbox
GMR71 x 8 £3.84 - Rubbers
£111.68 EX VAT
£131.22 INC VAT
Well dont suppose thats too painfull £131.22 inc VAT....... 8-)
Obviously that's plus delivery, plus DIY fitting, but it could be worse!
Suspect I will be persuaded to splash out on genuine GM parts though... ::)
Oh well, I know what option I'd go for...........yup, rolling about the floor on cold wet day with the smell of WD40, skinned knuckles and back ache..... ;).......rather than give my hard earned to GM..... :-/
There is no question of that - fitting I will do.
However, I think the parts may still need to be from GM.
[/quote
But at least you'll have peace of mind that it wont be fitted by numptys........ :y
-
Example one....
Cheap(ish) after market exhaust fitted to an Omega saloon at a octs of over 250 quid.
Less than two years later all the inetrnal baffles have collapsd and its sounds awful.
Example two...
Gm exhaust fitted three yers ago at a cost of under 250 quid.
3 years on and its still in excellent condition.
Its a no brainer.
-
Thought so Mark
The exhaust on my 3.0 is GM, and in good nick, I'm half tempted to fit that !!
-
Don't. Its a nice car. Don't ruin it just to save a few quid (which it won't). You have TC, use it!
-
GM all the way matey, you'll be sorry otherwise and end up splashing out more in the long run.
-
Don't. Its a nice car. Don't ruin it just to save a few quid (which it won't). You have TC, use it!
Why not? It's Genuine GM, and nearly new looking at it, not a spec of rust anywhere.
Or is it the wrong one for this car?
-
It might be worth offering it up to see how they differ, and if you can modify it to fit. You can always slap the correct one on if it 'aint going to work.
A slightly modified 2nd hand GM exhaust will still be much nicer than a fast fit special!
Kevin
-
Example one....
Cheap(ish) after market exhaust fitted to an Omega saloon at a octs of over 250 quid.
Less than two years later all the inetrnal baffles have collapsd and its sounds awful.
Example two...
Gm exhaust fitted three yers ago at a cost of under 250 quid.
3 years on and its still in excellent condition.
Its a no brainer.
Example 3: From personal experience, get a fitted GM exhaust......for a reasonable price.....take it back twice......have it refitted once again.....still no good. Get a cheap(ish) one yourself and fit it yourself......you know it has been fitted properly so if it f@@ks up then it's down to bad luck. I got a rear section and backbox from SCR in Norwich for my SRI cavalier a few years ago. Fitted it myself....cost £135.00..........3 hours graft.......no worries.....its still going ok cos I know the guy I sold it to over 3 years ago. Its no brainer cos we're all being ripped off at the end of the day...... :y
-
Example one....
Cheap(ish) after market exhaust fitted to an Omega saloon at a octs of over 250 quid.
Less than two years later all the inetrnal baffles have collapsd and its sounds awful.
Example two...
Gm exhaust fitted three yers ago at a cost of under 250 quid.
3 years on and its still in excellent condition.
Its a no brainer.
Example 3: From personal experience, get a fitted GM exhaust......for a reasonable price.....take it back twice......have it refitted once again.....still no good. Get a cheap(ish) one yourself and fit it yourself......you know it has been fitted properly so if it f@@ks up then it's down to bad luck. I got a rear section and backbox from SCR in Norwich for my SRI cavalier a few years ago. Fitted it myself....cost £135.00..........3 hours graft.......no worries.....its still going ok cos I know the guy I sold it to over 3 years ago. Its no brainer cos we're all being ripped off at the end of the day...... :y
Who said anything about letting a garage fit it.....
-
It might be worth offering it up to see how they differ, and if you can modify it to fit. You can always slap the correct one on if it 'aint going to work.
A slightly modified 2nd hand GM exhaust will still be much nicer than a fast fit special!
Kevin
I even have a reciept to say it's only a few months old, I don't think it's done 5k miles, and is genuine GM.
If it won't do the car any good, then I will of course not fit it...
I just think I'm missing something - apart from the twin exit backbox, what's different?
-
I just think I'm missing something - apart from the twin exit backbox, what's different?
I guess it's a matter of getting them side by side and comparing.
As long as you modify the exhaust to fit the car, not the other way rounbd I can't see any harm in trying. Depends on the time it could take messing about with it against the cost of a new VX system.
Kevin
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
New GM exhaust it is, then...
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
New GM exhaust it is, then...
Mislaid my 'Book', and can't be bothered to load EPC tonight, but if M_DTM says the centres are the same, then use them, and just new backbox.
My earlier DON'T comment was for pattern parts
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
New GM exhaust it is, then...
Mislaid my 'Book', and can't be bothered to load EPC tonight, but if M_DTM says the centres are the same, then use them, and just new backbox.
My earlier DON'T comment was for pattern parts
That's if I can seperate them... I'm not sure, should be OK given that they're newish.
To be honest, the facelift mid boxes look different to the pre.... I recon just splash out on a whole new system?
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
New GM exhaust it is, then...
Mislaid my 'Book', and can't be bothered to load EPC tonight, but if M_DTM says the centres are the same, then use them, and just new backbox.
My earlier DON'T comment was for pattern parts
That's if I can seperate them... I'm not sure, should be OK given that they're newish.
To be honest, the facelift mid boxes look different to the pre.... I recon just splash out on a whole new system?
Your call...
-
Centre sections are the same.....back box is different...plus the back boxes changed at facelift with different mounting points.
New GM exhaust it is, then...
Mislaid my 'Book', and can't be bothered to load EPC tonight, but if M_DTM says the centres are the same, then use them, and just new backbox.
My earlier DON'T comment was for pattern parts
That's if I can seperate them... I'm not sure, should be OK given that they're newish.
To be honest, the facelift mid boxes look different to the pre.... I recon just splash out on a whole new system?
Your call...
Consider it done...
-
To be honest, the facelift mid boxes look different to the pre.... I recon just splash out on a whole new system?
Read my lips......THEY ARE THE SAME!
They might look different becasue I suspect the ones you currently have are 7 years old and a slightly different can pattern.
-
I'm interested to hear how you get on James. I have always shied away from fitting exhausts due to likelyhood of seized joints/sheared bolts and the last time I had an exhaust fitted it needed heat treatment to make it fit (although now I am enlightened on here, maybe it was due to it being a pattern job).
Presumably easier though fitting a full system.
-
The only risk on the V6 with an exhaust change is the centre to front pipe blts sheering (because the aftermarket bodgers dont fit stainless bolts so they rust).....so treat them to a spray of penetrating every day for a few weeks before thy need removing.
Other than that, its one of the easiest exhaust system to fit going.
-
To be honest, the facelift mid boxes look different to the pre.... I recon just splash out on a whole new system?
Read my lips......THEY ARE THE SAME!
They might look different becasue I suspect the ones you currently have are 7 years old and a slightly different can pattern.
you're the Boss ;D
I'll see if I can get 'em off then :P