Welcome to the North American Subaru Impreza Owners Club Friday July 11, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Custom Fabrication, Welding & Tools

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-04-2011, 12:17 AM   #1
STI_GUY_06
Scooby Newbie
 
Member#: 250750
Join Date: Jun 2010
Chapter/Region: NWIC
Location: washington
Vehicle:
2006 sti
black

Default megan header welding

I would like to purchase a megan header/upipe manifold but am concerned a little bit about leaks and cracks with this piece. Would taking it to an exhaust shop and having them weld over the original welds before installation make a difference in increasing the longevity/reliability of it? And one more question, would doubling the gaskets between the manifold and the heads help prevent exhaust leaks if they were to occur?
* Registered users of the site do not see these ads.
STI_GUY_06 is offline   Reply With Quote
Old 03-04-2011, 02:20 AM   #2
SHARP_DAL
Scooby Newbie
 
Member#: 183247
Join Date: Jun 2008
Chapter/Region: E. Canada
Location: Toronto
Vehicle:
2005 WRX
WRB

Default

Double welding wouldn't make a difference unless the welds did not fully penetrate the steel. Just go over all the welds and make sure it fully penetrated. Plus I think getting someone skilled to go over all weld will cost a fair bit, but If the headers have slip joints then welding the slip joint will prevent leaks.

Do not double up gaskets it will just cause bigger leaks. Use quality OEM or grimmspeed gaskets, you will only experience leaks if the flangs are thin and warp. Biggest issue with the headers will be crack in the steel and in weak joints.

Run them for a year, if they crack weld it up, or toss them out... good luck with installation btw.... I'm not too sure but many 4-2-1 headers have fitment issues and need trimming of the subframe to fit..
SHARP_DAL is offline   Reply With Quote
Old 03-04-2011, 07:05 PM   #3
jjagg0125
Scooby Newbie
 
Member#: 163452
Join Date: Nov 2007
Location: southwest michigan
Vehicle:
2006 sti
aspen white

Default

do not do this.... im a welder and have welded many subaru headers, honestly the less welding you can do to the headers the better, if they crack then weld them. welding causes stress especially on stainless when it cools which can at times cause cracks itself and or make the headers warp or pull especially on a cheaper header with a cheaper grade of stainless... just my .002
jjagg0125 is offline   Reply With Quote
Old 03-07-2011, 10:52 PM   #4
siikfast
Scooby Newbie
 
Member#: 276110
Join Date: Mar 2011
Vehicle:
2006 WRX
Gray

Default

Quote:
Originally Posted by SHARP_DAL View Post
Double welding wouldn't make a difference unless the welds did not fully penetrate the steel. Just go over all the welds and make sure it fully penetrated. Plus I think getting someone skilled to go over all weld will cost a fair bit, but If the headers have slip joints then welding the slip joint will prevent leaks.

Do not double up gaskets it will just cause bigger leaks. Use quality OEM or grimmspeed gaskets, you will only experience leaks if the flangs are thin and warp. Biggest issue with the headers will be crack in the steel and in weak joints.

Run them for a year, if they crack weld it up, or toss them out... good luck with installation btw.... I'm not too sure but many 4-2-1 headers have fitment issues and need trimming of the subframe to fit..

Agree With this, One thing to add is, Put the header on, before you weld the slip joints and mark the tubes.. Not every header is built equal.

STI_GUY_06 - Dont double the gasket, Take it to a pro- and have them surface the flanges. Second, Dont buy cheap. Buy a header that is made of a good quality stainless. Its not cheap to be cool!
siikfast is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Perrin catback,megan dp,megan header and more Derek C Engine/Power/Exhaust 9 08-27-2009 06:39 PM
FS:Perrin Catback, Megan Header, Megan dp and more Derek C Engine/Power/Exhaust 9 07-18-2009 06:55 PM
02-03 Wrx Brand New GT Spec Megan Headers, uppipe, Header Wrap dezwrx03 Private 'For Sale' Classifieds 0 10-02-2004 05:14 PM
CA: 02-03 Brand New Megan headers w/ flex uppipe + header wrap dezwrx03 Private 'For Sale' Classifieds 1 09-04-2004 10:46 PM
('93-'01) Borla Header weld leak Splat_One Impreza Forum 4 09-03-2001 01:26 AM


All times are GMT -4. The time now is 10:10 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.