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HELP!!! Rumble/Growl coming from engine and exhaust, check engine light on

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Old 05-26-2009, 10:48 AM
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Originally Posted by Allroady DungBeetle
Wow, those are gone. Nobody will be open today. And you'll probably have to order them but maybe not depending how well stocked a shop go to.

The down-pipes will have to come off the manifolds and the joints welded on.... I have done them *in* the car, but 99% of shops will want to take it apart as it is a lot easier to do that way. Also if I was to warranty my work I'd pull them off and weld it on the bench to get a better weld.

You may also find some shops will tell you you have to replace the pipes, joints and cats as they are one piece.... find a custom shop and they can weld in a new flex joint.

Also look inside the cats and make sure the "cat guts" (LOL) are not loose in there or cracked - if they are now is the time to replace the whole thing.

Doug
I'm looking at the same problem with an '01 a4 2.8q. Anyone have a ballpark estimate on how much it costs to get the flex pipes replaced?
Old 05-26-2009, 05:22 PM
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About $100-$120 for each pipe.
Old 06-02-2009, 05:16 PM
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I took mine to a local "down the street" muffler shop and he welded on 2 new flex joints and pipes for $150. in and out in a day, not a big procedure at all. good luck!
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