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97 A4 1.8T Catalytic Converter

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Old Apr 15, 2006 | 12:05 AM
  #1  
kwatro's Avatar
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Default 97 A4 1.8T Catalytic Converter

Hi, I searched around the forum but can't find the details I'm looking for.

Right after the turbo, the exhaust pipe separated. I'm told I need a new catalytic converter, so I ordered a direct fit off of a web site. The car originally came from California. The guy told me that the 2001 CAT will work on my 97 California model. He also said I should be able to pull off the old one and install the new one without too much aggravation.

Does this sound right? I'm just looking for a second (3rd, 4th, etc.) opinion.

By the way, I just bought this car off of CraigsList for 5K$ which seemed like a steal. I'm guessing the previous owner figured a way to temporarily re-attach the pipe before I bought it. Any caveats, please let me know. Otherwise this car is in like-new condition, runs fast and smooth. (And loud, now).
 
Old Apr 15, 2006 | 06:53 PM
  #2  
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Default RE: 97 A4 1.8T Catalytic Converter

Has anybody on this forum ever messed with the exhaust on a 1.8T? Advice, tips, anything??

 
Old Apr 15, 2006 | 07:23 PM
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Default RE: 97 A4 1.8T Catalytic Converter

yes a cat from a 2001 will work any b5 cat should work. IF he said it was easy he lied to you. Its easy if you done it before but for the first time its a PITA especially trying to get the rusted nuts off.
 
Old Apr 15, 2006 | 08:46 PM
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Default RE: 97 A4 1.8T Catalytic Converter

Trailboss, thanks for the advice! I'm much relieved to know I got the right part.

He didn't say it was easy, exactly. He said it's only six bolts and shouldn't take more than two hours. Eeek, twenty minutes per bolt does sound like a PITA. While I'm messing with this, what else should I be looking out for? I've only had the car a couple of weeks so I don't know what else might be wrong.
 
Old Apr 15, 2006 | 10:45 PM
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Well some tips, go from the wheel well and mess around in there along with underneath the car. Change the gaskets at the turbo-cat connection and the turbo-DP connection. Have a crap load of pb blast. The bottom nut at the turbo cat connection can be easily done from the bottom with extensions. It would make things alot easier if you remove the airbox too as far as working room, that should only take 20 minutes tops. There is a heatshield above the CV joint remove that, its just less in the way, its an allen head probablly 5 or 6mm so an allen socket or whatever they are would save a lot of time.
 
Old Apr 16, 2006 | 01:42 AM
  #6  
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Default RE: 97 A4 1.8T Catalytic Converter

Hi im Matt from UK i have a 1996 A4 1.8T Sport and have a Miltek exhaust system with sport CAT. Its well worth getting a sport CAT u see good gains got around 10bhp with everything thing.
 
Old Apr 16, 2006 | 02:03 AM
  #7  
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^^true but $400 is alot for a HFC, Id rather buy a testpipe for $160 and put my CAT back in before emissions if your worried about it.
 
Old Apr 16, 2006 | 10:20 AM
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Default RE: 97 A4 1.8T Catalytic Converter

True but was told a de-CAT confuses the ECU?
 
Old Apr 16, 2006 | 02:54 PM
  #9  
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Yes you can get a cel from the secondary o2 sensor because its in the mainstream airflow and senses something isn't normal but it can be bypassed. Really the secondary o2 sensor is pointless if you have a testpipe or any type of cat - delete.
 
Old Apr 16, 2006 | 08:48 PM
  #10  
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Default RE: 97 A4 1.8T Catalytic Converter

ORIGINAL: kwatro

Hi, I searched around the forum but can't find the details I'm looking for.

Right after the turbo, the exhaust pipe separated. I'm told I need a new catalytic converter, so I ordered a direct fit off of a web site. The car originally came from California. The guy told me that the 2001 CAT will work on my 97 California model. He also said I should be able to pull off the old one and install the new one without too much aggravation.

Does this sound right? I'm just looking for a second (3rd, 4th, etc.) opinion.

By the way, I just bought this car off of CraigsList for 5K$ which seemed like a steal. I'm guessing the previous owner figured a way to temporarily re-attach the pipe before I bought it. Any caveats, please let me know. Otherwise this car is in like-new condition, runs fast and smooth. (And loud, now).

Noooooooo! Just get it welded back to the flange! It cost me 60$ in labor! Cancel your order or something. You don't need a new cat; the cat isn't the issue. That Audi only pressed the cat into that flange rather than bolted/ made it one piece is the problem. All you need to do is get the cat and that cat>turbo flange taken out and welded into one piece. Order new gaskets (cat>downpipe and cat>turbo from ecstuning.com, should be like 15$ for both) and you're good.
 



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