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Old 06-22-2010, 05:28 PM   #1
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Default Downpipe welded to exhaust, bad idea?

I have begi downpipe/exhaust. It is connected via 1 bolt and slips into each other. I had it come out a few times and recently discovered it may be leaking.


Is it bad if I have the DP welded staight to the exhaust?


I guess it will make things difficult when I want to take it off...


Besides that, anything?

Last edited by jbrown7815; 06-22-2010 at 05:40 PM.
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Old 06-22-2010, 05:31 PM   #2
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If you are even considering welding them all together... just buy a flange and have it welded in. Don't weld it all up into one piece. Removal will become the devil.
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Old 06-22-2010, 05:34 PM   #3
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Quote:
Originally Posted by splitime View Post
if you are even considering welding them all together... Just buy a flange and have it welded in. Don't weld it all up into one piece. Removal will become the devil.
+1
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Old 06-22-2010, 05:38 PM   #4
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Yeah after I posted this the exhaust shop called me and said it shouldn't be welded...


I'm just trying to figure out why I have a weird sound under boost... I'm rly hoping it is either an exhaust leak or a boost leak.


Recently my drive shaft came off in the back, all the way down to one bolt. When this happened the drive shaft beat the **** out of things under the car, swinging around on one bolt. I'm hoping it just created a leak somewhere in the exhaust.
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Old 06-22-2010, 05:41 PM   #5
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Thanks for everyones help. I know I've been making lots of noob threads, I'm just trying to learn as much as I can.
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Old 06-22-2010, 05:51 PM   #6
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It is possible to "pin" it in with a sheet metal screw at the slip joint. Put a little RTV or loctite to help keep it in.
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Old 06-22-2010, 05:59 PM   #7
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+1 on putting a flange on it with a fresh exhaust gasket of some sort and tightening it down!
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Old 06-22-2010, 06:13 PM   #8
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Do this:
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Old 06-22-2010, 06:17 PM   #9
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Uhhh i welded my DP. But just the DP part where they connect(BEGI one) like you were saying is held together by one bolt. Didnt really like the design. It worked for about a month then it started leaking and turned my hood pitch black. So i took it out and TIG welded it. Now no more exhaust leaks
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Old 06-22-2010, 06:17 PM   #10
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When I had that PITA I slammed the two pieces together and wrapped a coat hanger through the eyelets and twisted it together. Did this fix at an autox during lunch and it held for 8 months after that til I removed it to upgrade.
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Old 06-22-2010, 06:18 PM   #11
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Old 06-22-2010, 06:19 PM   #12
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After re-reading the original post, I feel like I misunderstood. Do you want to weld the 2 piece downpipe together, or do you want to weld the 2 piece downpipe to the exhaust?
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Old 06-22-2010, 06:44 PM   #13
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Quote:
Originally Posted by jbrown7815 View Post
Recently my drive shaft came off in the back, all the way down to one bolt. When this happened the drive shaft beat the **** out of things under the car, swinging around on one bolt. I'm hoping it just created a leak somewhere in the exhaust.
Braineack knows all about drive shaft bolts coming loose. It definitely makes interesting sounds. Now when ever I have to pull his transmission I make sure I get those super tight.
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Old 06-22-2010, 06:56 PM   #14
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hahah, those were the good old days!

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Old 06-22-2010, 07:32 PM   #15
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Quote:
Originally Posted by shuiend View Post
Braineack knows all about drive shaft bolts coming loose. It definitely makes interesting sounds. Now when ever I have to pull his transmission I make sure I get those super tight.



What do you use on it? Loc tight?

Quote:
Originally Posted by Jeff_Ciesielski View Post
After re-reading the original post, I feel like I misunderstood. Do you want to weld the 2 piece downpipe together, or do you want to weld the 2 piece downpipe to the exhaust?



to the exhaust.

Quote:
Originally Posted by wayne_curr View Post
When I had that PITA I slammed the two pieces together and wrapped a coat hanger through the eyelets and twisted it together. Did this fix at an autox during lunch and it held for 8 months after that til I removed it to upgrade.
Almost did this, but foudn bolt to use.


Haven't stress tested it yet. I had the exhaust come out twice before though launching it...
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Old 06-22-2010, 07:46 PM   #16
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Quote:
Originally Posted by jbrown7815 View Post
What do you use on it? Loc tight?

pure muscle. acutally i scare the bolts into never failing again.
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Old 06-22-2010, 07:58 PM   #17
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Quote:
Originally Posted by Braineack View Post
hahah, those were the good old days!

How many of those things happened when I was in the car?
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Old 06-22-2010, 09:24 PM   #18
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all 4!
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Old 06-22-2010, 09:29 PM   #19
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all 4!
God I am going to miss breaking your car when I move.
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Old 06-22-2010, 09:46 PM   #20
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Quote:
Originally Posted by shuiend View Post
How many of those things happened when I was in the car?
i think you were sittin on the curb with me when the driveshaft fell off... or were you the ride along?
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