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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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#1
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CAT Rattling
hello, so im new to forum had my S8D2 for about 2wks, what started out like a tiny rattle which I thought was a loose heatshield turns out to be my CATs. The previous owner told me he had issues with the CATs and they were "removed" looking underneath, a frankenstein job has been done, opening up the CATs and rewelding them back up.
Im thinking I have two options: 1 - buy new CATs and get an exhuast fabrication shop to fabricate the exhuast section between the downpipes and the mid-section exhaust 2 - just fabricate a straight through pipe removing the CATs? could be issue with MOT? Any experience / advice welcome. thanks Marty |
#2
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Any changes to the emissions control on a car is an automatic MOT failure. As for the first part of your question, there are members here who have fitted sports CATs to their cars, as the OEM ones are either NLA or very expensive. It might be worth a search to give you some ideas.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#3
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I had this.
Andy at A for Audi in Glasgow solved it in one second by smacking the rattly cat with a hammer.
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Mine is an early FL S8, reg'd in 1999. Volcano black, black leather and black wood. |
Tags |
cat, exhaust, fabricate, mot |
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