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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
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Thread Tools | Display Modes |
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#1
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Has anyone....
Any experience with after market catalysts? The flexible joint on mine is starting to look decidedly second hand...As are the pipe to Manifold studs which are definitely going to go “ping” the moment I even look at them with a spanner
I’m going to need a new one at some point In the near future, but are aftermarket units actually capable of passing the MoT emissions test? I’ve put a request in to the forum sponsors for a unit if they have one but there are some attractively priced new units out in the big wide world. However there’s no point getting a new one if the catalyst parts are ineffective. So do off the shelf pattern parts work? Or do I avoid them like the plague? Answers on a postcard.
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PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound. Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting. Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids |
#2
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I've had sports cats on mine for around 9 years, they pass MOT fine but they do throw the EML light occasionally, easily sorted with a cheap code reader from Ebay
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Audi S8 2002, Black (even the chrome bits) Audi RS6 Avant 2008, Daytona Grey Maserati Granturismo 2008, Metallic Nero Carbonio Audi S8 2015, Daytona Grey |
#3
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I think David’s has aftermarket sports cats as well and he also has the EML light issue. But, IIRC, the fitter can put in little spacers for the sensors to take them out of the flow of the exhaust and this, apparently, stops the light coming on. One of my cats is starting to rattle, so I’m interested to see how you get on
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!). |
#4
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I had after-market sports cats fitted a couple of years ago too. Audi quoted £2,500 for a pair of OE cats (not inc. fitting) when my old cats first started rattling. And by the time the rattle had gotten much worse, just a few months later, the OE cats were NLA, so I had no choice but to look at alternatives. I decided to go for a custom stainless steel exhaust in the end, complete with after-market cats. More info here:
http://forum.a8parts.co.uk/showthread.php?t=14489 I've had no problem with the exhaust passing MOTs -- I believe the important thing is that the cats should be 'E' marked/approved, which mine are. I do have to occasionally reset the EML (usually after being stuck in slow moving traffic for a long time), but I can do that by the roadside in seconds using my phone and OBDeleven device. It's a slight annoyance but a fairly rare occurrence. It's worth noting also that you may be able to sell your old cats to a recycler, even if they're badly rattling (like mine were). I got £220 (£110 each) for mine. EDIT: Zaustworx video of my car attached below: And this should be a direct link to my car on Zaustworx's FB page: https://www.facebook.com/ZaustworxCu...9764221425173/
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Mark ------------------------------------------------------ 2002 FE S8 Ebony Black Pearl ------------------------------------------------------ ------------------------------------------------------ Cars Owned: The Tesla Era: 2020 Model S Performance Ludicrous+ (present) (Black, with all black premium interior and carbon fibre décor, 21" sonic carbon twin turbine wheels and FSD capability) The Audi Era: '97 A8 4.2 (Ming Blue) --> '96 A8 4.2 QS (Dark Green) --> '02 FE S8 (present) The Citroen Era: '84 BX 1.6 RS --> '89 BX 1.9 DTR Turbo --> '94 XM 2.0L Turbo --> '96 XM 2.0L Turbo Exclusive --> '00 Xantia Activa 2.0L Turbo The Banger Era: '76 1.2L Lada VAZ-2101 (Ruski Fiat 124) --> '80 1.7L Morris Ital HL, finished in Ermine White and Rust Last edited by moltuae; 6th August 2020 at 08:28 AM. |
#5
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Quote:
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind. |
#6
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I’ve had an after market on mine for a couple of years. It triggers the EML but makes zero difference to the car’s performance.
Come MOT time I get it turned out, get the MOT done, and move on. THe cat was £250 from Catman UK and whilst smaller than the OEM ones, hasn’t given me any problems.
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2002 S8 Aqua Pearl, entirely original apart from FE 20" OEM wheels and Milltek exhaust. |
#7
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Following on from Adrian reply.
I have just sent 2 X my OEM cats to Germany. A Company called KFZ-Technik SEUBERT who are based in Pforzheim As Adrian stated, these are as close as close to OEM as you can get. Mine were repacked with two 400 cell units in each cat They cut open the OEM cats, weld in an additional bracket and then repack with two new units. They then reweld and spray units with antirust spray They then posted back to me. Cost for carrying this work out, including posting back was 767.13 euros (£710) Postage to them from the UK cost me £56 including insurance. Not fitted them to the car yet, but they look good and ready to go. They returned refurbed cats within 10 days. Contact me if you need more info David
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2002 S8 Final Edition, Avus Silver with Red leather interior Guildford, Surrey Tiptronic with Sport mode button. Sony rear entertainment package. Bose sound system. Audi Navigation Plus. 20 inch Final Edition alloys Full Cat Back Stainless Milltek exhaust, giving a great V8 burble : 1997 A8 Quattro Sport - Now sold when S8 FE purchased |
#8
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If the cats are I would just cut out flexi piece and weld a new one in. Cheaper and you get to keep original cats.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#9
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I am pretty sure an FL D2 won't pass the age-appropriate appropriate emissions test without cats - I've tried it. Big Red (2002) has the pre-cats only which keep the ECU happy, but needs to be roasting hot to pass just barely within spec without the main cats. Ditto Mike's 4.2 Allroad (2005?), which also has pre-cats so no EML, but empty cans for the main cats. That missed the limits by a sizeable margin IIRC so we're fitting some Magnaflow E-marked cats to it before its MoT. Both of those engines are in good health and running well.
An early PF might pass without cats I guess, although I think it still supposed to have them. |
#10
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An exhaust/Cat fitting business suggested to me a few years ago that probably the most economic way out of this issue was to replace the dead cats with a couple of E marked aftermarket items for a 2.0L Mondeo!
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________________ Cars: 2002 D2 S8 Aqua (gone but not forgotten) 1988 UR quattro 2003 A2 FSi Sport 2020 Seat Leon Cupra R ST Abt 1989 911 Carrera Cab Couple of Mk1 Golf Gti's (in bits) |
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