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Old 03-08-2014, 05:44 PM   #1
Ishbar
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Default To weld or bolt on exhaust, the is the question

So I noticed a rumbling whenever I hit certain RPMs a few weeks ago. I thought it was my plate vibrating against the frame it's in, however upon further inspection it appears my muffler / midpipe connection has come undone.

Now I have been given two pieces of advice, I can either try to get it welded back together. Or I could buy a new gasket, and drill larger bolts through to keep the pipes together. I was wondering what anyone's thoughts were on one or the other.


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Last edited by Ishbar; 03-08-2014 at 11:14 PM.
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Old 03-08-2014, 07:04 PM   #2
MoreChuChu
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You could get a quote from a muffler shop to have new flanges welded on. Might not be cost efficient, however. Worth a shot.
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Old 03-08-2014, 11:14 PM   #3
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I updated thread, photos didn't import from my phone when trying to add them.
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Old 03-09-2014, 01:46 PM   #4
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U must drive on salted winter roads a lot. Replace the whole thing with stainless since the rest of the pipe is probably not too far behind.
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Old 03-09-2014, 08:36 PM   #5
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Quote:
Originally Posted by Scoobiesdoobies View Post
U must drive on salted winter roads a lot. Replace the whole thing with stainless since the rest of the pipe is probably not too far behind.
I live in CT, but my car came from VT. 2008-2012 is what it spent there for 60,000 miles.
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Old 03-10-2014, 07:46 PM   #6
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Replace or find a "take-off" here on the forums that someone is selling.

If the flanges are rotted that badly, the pipes themselves are not that far behind. Meaning, welding anything to repair this will be short-lived and an effective waste.
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Old 03-10-2014, 09:50 PM   #7
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Yep. Lots of people selling stock turbobacks on here you could throw on and never worry about it again.
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Old 03-11-2014, 09:07 PM   #8
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Actually theres a stock 12' hatch exhaust for free pickup on the fs forum in engine/exhaust.

Dunno if it will fit but its free! And thought id try and help lol

http://forums.nasioc.com/forums/show....php?t=2580868
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Old 03-12-2014, 08:30 AM   #9
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using bolts and nuts would be better. if you weld them and then in the future want to repair the car ( maybe engine or...) which you need to remove the exhaust pipe it would got problem and would make it tougher. so use the bolts as a original one.(my opinion)
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Old 03-12-2014, 09:01 AM   #10
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I also vote for a full stainless upgrade. Road salt will make short work of that exhaust, I know. If I were closer you I'd sell/give you my stock exhaust I took off.
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Old 03-12-2014, 01:03 PM   #11
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Quote:
Originally Posted by Scoobiesdoobies View Post
Yep. Lots of people selling stock turbobacks on here you could throw on and never worry about it again.
Lol thanks, I looked into it. It's the dual exhaust quad tips. I can't use that, I've got a regular Impreza. I'd need a bunch of other parts to make it work (if I'm not mistaken) since I think those mold in.

I'm not very well equipped / mechanically inclined. I feel comfortable with some stuff, like putting a new gasket and bolts on. Fully removing the exhaust system is not only more technical than I'm experienced with, and much, much more expensive. I'm going to try the bolt method and take it from there.
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Old 03-12-2014, 01:26 PM   #12
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Don't forget washers to accommodate for the over sized holes. Might help the bolts from dropping out again and cracking the flanges.
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Old 03-12-2014, 06:10 PM   #13
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I would take it to a shop, shouldn't be but 50ish dollars, well worth avoiding all the hassle.
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Old 03-16-2014, 06:55 PM   #14
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Okay, so I'm gunna order the part. However, I'm confused in regard to what I need to order.

I know i need an exhaust gasket connecting to the muffler. But when I look for parts, part 14 is listed as LEFT / RIGHT. I have no idea what that means, since I thought the part was symmetrical, unless you need BOTH, one on either end? (but that sounds stupid).

Basically, I'm trying to see if the way they do inventory is stupid and listed the same exact part twice or not. I was under the impression there was only one part.

http://qualitysubaruparts.com/parts/...gramCallOut=14
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Old 03-17-2014, 07:28 PM   #15
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Weld!
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Old 03-18-2014, 11:31 AM   #16
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Its really easy to drop your exhaust and put a new one on man. Just unplug the two O2 sensors, Unbolt from the heads take the rubber holders off the links of your muffler and exhaust tubing then lift it about 1" push forward and it will drop. I totally agree with the replacement idea I got my Subaru from someone in CO and the rust/ rot damage is not worth repairing and waiting a year for it to fall into pieces while your on the road man trust me. I hit a speed bump and a big old section of piping fell off from the front stayed a little connected in the back and ripped my muffler off and damaged my back bumper along with the head shielding. Ended up costing me about $1000 more than a replacement.
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Old 03-18-2014, 07:56 PM   #17
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for now, a low cost option would be this. cut both flanges with a sawzall. put a stainless band clamp in place of the flanges. i did this on my folks older car and its held fine for about a year. they didnt want to drop any more money into their car hence the cheap solution.
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Old 03-27-2014, 10:19 PM   #18
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Update: so we ran into some problems. We were going to use OEM bolts, but the bolts in there were not only rusted, but WELDED on one end. We spent about 2 hours total with a saw (hand powered), cutting each side. Then we took vice grips and pulled the other end out of the hole / breaking the rust / welded metal.

We had to get larger bolts, which was fine, but no parts store had a bolt that was the length we wanted. Not to mention...the bottom hole was threaded at an angle, so we had to get large bolts that would thread diagonally, but because the bottom flanged hole was IN HALF. Although it may not sound huge, there was a 1/4'' chunk missing. We used several washers to evenly distribute pressure over a wider area so the hole wouldn't break. We also used several washers because the gasket would not completely seal. In the very middle there was a large opening. Each flanged end of the pipe had a little curve on the left side.

After the washers we turned a 1/16'' opening to a 1/32'' opening, but when shining a light on the rear, we could see it. I've ran the car for about a day and so far the small "fart-like-flap" leaks a little bit of exhaust.

When doing all this, we found a nasty 1 1/2'' hole on the top end of the flanged pipe leading into the muffler. We used some quick steel and a thermal bandage and it has sealed up fine. The car is MUCH quitter with all this work, but with that said..

I was wondering what would be recommended (aside from the few points I make against higher end things)?

I can either plug that tiny flap with some kind of bond material...OR put a second gasket to see if it would seal.

I still can't replace the whole setup because I couldn't spend more than $200 on parts right now (financial reasons). If it all goes, then at that point I will pinch pennies, but this should work for a while...while I also don't want to weld because I don't have the tools, and was quoted $70 at my local shop. If I don't have to spend it, I don't want to. Period (again, I have a right to be cheap).

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