Exhaust. Advice needed
I think I wrongly assumed that the G wagon had a full length exhaust and exited at rear.
After looking underneath I do not see anywhere for an exhaust to go.
So the side exiting, modified and very loud sports box exhaust that is fitted to my G is not that far removed from the original.?
it is really very noisy outside and Boomy in the Cab. Certainly can't cope with it on long journeys.
iI'm not sure whether I keep the current back box and add another where the fake cat is. Or go for a new custom made exhaust altogether. Or even the original type exhaust.
Is the original exhaust quiet?
Dont care if it has Cat or not just want it to be quiet so long journeys will be more enjoyable.
Any advice appreciated.
Hi
the correct MB supplied exhaust system will cost you more than £1200 ..your existing exhaust may well cause the engine to run inefficiently as well as noisy ............. you should be aware of the fact that.the K series Jetronic fuel management system needs a close tolerance back pressure to work properly
From MB
I think this will make your mind up on your options!!!!!
Front Pipes A463 490 00 19 £658 + VAT MB GERMANY
Catalyst A463 490 10 14 £1655 + VAT NEW MB GERMANY or £955 + VAT EXCHANGE NOT CURRENTLY AVAILABLE
Centre Box A463 490 20 01 £204 + VAT RIDGEWAY SOUTHAMPTON (ONLY ONE I CAN FIND ANYWHERE)
Rear Box A463 490 41 01 £320 + VAT MBUK
£2837 + VAT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Thats without any brackets, clamps, fixings or sensors etc.
Time for some aftermarket work one feels!!!
Maybe you could get the existing silencer checked out to see its baffle arrangment and get it rebaffled? or a new one made with extra baffling to quieten it down? As well as replace the cat with another box? Maybe heed fixwin's notes on the performance and the tie in with the K Jetronic system...
Sorry to be the harbinger of doom ;)
Gav
I think without a reading from the lambda sensor the system defaults to a fixed mixture so you can still drive around, but maybe without the best economy, but I doubt you would notice the difference.
The lambda sensor sits before the cat, so it can sense the level of O2 in the exhaust gases before they pass through anything, so I am not sure how removing the cat affects that. You are likely thinking about later cars that have 2 O2 sensors, one before and one after the cat.
The OE system is quite lengthy but well hidden under the car, please see the links below (if they work), after the cat there is a middle box and large end box, which absorbs most of the noise.
http://www.auto-parts.spb.ru/cat/cats/m.mycat?Pic&syspm=f4ddf1ababa55305...
http://www.auto-parts.spb.ru/cat/cats/m.mycat?Pic&syspm=f4ddf1ababa55305...
There appear to be pattern/non-original ones available in Germany for a fraction of the cost of original, the question is, can you have one made with 2 boxes for less than that?
Middle section (doesn't make much difference to sound)
http://www.ebay.de/itm/Mercedes-G-Modell-W463-200-230-300GE-300GD-MSD-/2...
End section:
http://www.ebay.de/itm/Mercedes-G-Modell-W463-200-230-300GE-300GD-ESD-/2...
My ge300 has had the cat removed and I was unaware the engine had a lamda sensor and seems not affected in the slightest by its deletion. Looking at the diagram it is 44 of the schematic and far in front of the down pipe and the cat itself. At the very least I would delete the rear silencer.
Thanks again Guys.
Ok this is the bit that's confusing me. What route under the G does the OE exhaust in diagrams take .
My exhaust comes down to drivers side then goes straight back and exits at wheel
Does any body have a diagram showing the OE exhaust route under the G.
From what I understand from the schematics above; the OE exhaust comes down from manifold into Cat - then exits straight for a bit and turns at right(ish) angle towards opposiste side of car - where it goes into center Box - then continues over to other side -turns right again into back box - then exits back box at same side to entry pipe - and emits next to wheel on passenger side.
Is this correct?
Hi
from the manifold to the cat then along a bit over the chassis in the drivers side rear wheel arch to a lateral centre box then a longtitudal box under the passenger side floor with the outlet forward of passenger side rear wheel.
this design was created as a result of the insistance by the TUV (german Vosa) that emissions must be to the centre of the road ( driving on the right)
Ok thanks that makes sense now.
So was the UK exhaust exactly the same and exited on the UK passenger/kerb side?
Which I take is legal by UK Vosa regulations?
Hi best info I can come up with ( in Northern Ireland )
Emissions++ single pipe drivers side( rear entry ) and drivers side (side entry )is the regulation for all new vehcles driving on the left .with steering wheel on the right ...dual pipes are allowed (rear entry only) or vertical in the case of trucks
seldom enforced on older vehicles unless the exhaust has been modified from the factory original ...noise levels can be subject to decibel meter testing by roadside inspectors.
a summons may be issued for a defective/noisy silencer
Thanks.
Newer Vehicles cannot exit at wheel on nearside I'm told, but older vehicles like my 1993(91) are ok.
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OK Gulp,
Custom Work looks likely.
"the K series Jetronic fuel management system needs a close tolerance back pressure to work properly"
What does this mean in reality for the Layman like me.
Also with no Cat doesn't that mean there is no Lamda sensor - what does that mean for fuel management?
Does the ECU or Jetronic fuel management- reconfigure itself?
Would it be better with a Cat.
I see some exhausts with cat on ebay for about £135!