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      03-25-2011, 06:25 PM   #1
Martin46
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Problem with OBX header

Hi guys,

I have serios problems with OBX headers - probably OBX sends to Europe the worst pieces

1. after instaling headers, there is no place to instal engine mount. There is 2cm missig, which is really much. Problem is in exactly sam place where three pipes conect into one, so modification is not possible

I am also waiting for the Gavin's helps, because I know he has been running these headers for som time. Also he posted the manual how to instal headers, please send me a link (i am not able to find it)


I am posting a picture, where you can see that engine mount can not be srewed into place


Any suggestions are welcomed!!!

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      03-27-2011, 10:07 AM   #2
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Did you install it on the wrong cylinders?
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      03-27-2011, 10:46 AM   #3
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Quote:
Originally Posted by ********* View Post
Did you install it on the wrong cylinders?
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      03-27-2011, 10:55 AM   #4
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Btw, I didn't know Gavin released a DIY guide....I found it. It's a few threads below.

He mentions you need to cut the engine mount....then he reinforced it but did not think just cutting would be a problem.

There's also some welding that's involved.....which I was unaware of. It would be nice if it was truly bolt on....
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      03-27-2011, 06:05 PM   #5
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I also heard you need to trim the engine mount...
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      03-27-2011, 08:20 PM   #6
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I think the problem lies with OBX. Personally I wouldn't put an OBX header on my lawnmower. They are notorious for poor quality and fitment.
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      03-27-2011, 08:25 PM   #7
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damn a lawnmower with headers would be sick
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      03-30-2011, 01:07 AM   #8
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OF COURSE they are fitten on correct cylinder.... I am not so stupit DD

I can not find Gavin guide - please can you post me a link?

Probably I have even worse quality than Gavin, because I need to cut the whole engine support - not just a small piece.

I will try to weld it and adjust, or I will make just the Cat by pass

Martin
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      03-30-2011, 07:57 AM   #9
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Quote:
Originally Posted by Martin46 View Post
OF COURSE they are fitten on correct cylinder.... I am not so stupit DD

I can not find Gavin guide - please can you post me a link?

Probably I have even worse quality than Gavin, because I need to cut the whole engine support - not just a small piece.

I will try to weld it and adjust, or I will make just the Cat by pass

Martin
Have you looked on the main page of this very forum lately? The gavin thread is on this very page. The title of it isn't very informative, however.. it is called something like "The Install (Huge Pics)"

edit - here..

http://www.e90post.com/forums/showthread.php?t=400093
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      03-30-2011, 10:17 AM   #10
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Yea I posted in the thread to bump it up SO YOU WOULD see it.

I guess you didn't....
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      03-30-2011, 01:41 PM   #11
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You need to remove the top thin cover metal on that mount, then take a grinder to the mount and basically cut a 2.5" long and .5" deep box out of it, then fill it in with weld to keep it strong. There will be 2-3mm clearance when the engine rocks under power, but it never hits

Your also going to need to cut 1 of your midpipes about an inch because 1 header is too long.

its a pain.
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      05-08-2011, 07:08 PM   #12
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hello


Headers are fitted.

1. Modification were made on headers not on engine mount.

2. Without O2 sim engine was weaker and much louder compared after installing O2 sim. (after cca 20km - 13 miles the engine check light shut down)

3. I have a minor problem with engine smoothness in low rpm - up to 1600. I suggest that problem is in position of the first o2 sensor.
- in original headers o2 sensor is after connection of three pipes into one
- in OBX the position of o2 sensor is before this connection

What do you think about changing the position of o2 sensors
- first sensor would be mounted on the position of secound (the secound one is either simulated by O2 sensor)



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      05-08-2011, 11:14 PM   #13
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nice. hows the power gain? does the power worth the pain of the installation?
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      05-09-2011, 02:17 AM   #14
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I am not exact about power, but I am sure that it was worth for the sound )

- and also I feel that power has increased..
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      01-08-2012, 01:55 PM   #15
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Quote:
Originally Posted by Martin46 View Post
hello


Headers are fitted.

1. Modification were made on headers not on engine mount.

2. Without O2 sim engine was weaker and much louder compared after installing O2 sim. (after cca 20km - 13 miles the engine check light shut down)

3. I have a minor problem with engine smoothness in low rpm - up to 1600. I suggest that problem is in position of the first o2 sensor.
- in original headers o2 sensor is after connection of three pipes into one
- in OBX the position of o2 sensor is before this connection

What do you think about changing the position of o2 sensors
- first sensor would be mounted on the position of secound (the secound one is either simulated by O2 sensor)



sorry for bring up a old thread but im with u on moving the 1st o2s mines been torowing p2198 and p2196 meaning o2 sensor stuck on rich! so what ic ant understand is how are they both stuck after a modded factory header? im thinking is the location of were they are at so i might swap them out ad put them in the rear location since my rears are turned off due to tune.


Anyone else have any idea on why this might throw thoese codes
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      01-28-2012, 07:40 PM   #16
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anybody!
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      09-11-2013, 02:15 PM   #17
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Exclamation

I had the obx headers installed on my 2006 330xi e90. The modification was also made on headers and not the support of the engine mount. ( took out the thin plate on the support and kinked my the long header to have the clearance to bolt back the support in place). My only problem is the connection on the mid pipe. I am missing 2 cm to make a perfect fitment. Any suggestion ????
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      09-11-2013, 05:21 PM   #18
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The mid pipe is suspended by rubber hangers, they should allow for some back and forward play, did you check that?
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      09-16-2013, 12:02 PM   #19
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Yes... now I have another problem.. check engine light is ON and I can also smell some wierd gas or fuel when I turn on the air ( hot and cold )..
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      09-16-2013, 12:43 PM   #20
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The engine check light is normal, get that fixed by getting a tune for catless downpipe setups. The car will always smell different the first couple of times after installing new exhaust parts. If the smell persists then it has to be a leak in the engine to exhaust gaskets. Are you using new gaskets?
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      09-16-2013, 12:46 PM   #21
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Yes I am using new exhaust gaskets. I had then grind until they fit on obx headers.. It's wierd cause it's been a week that I have them install and everythig seemed fine..
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      09-16-2013, 01:03 PM   #22
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My only concern is the guy told me that it will probably leak from mid pipe to headers (cause there was a small gap ) ..( i will take some picture soon enough to show ) .. There's couple things that I remember when he installed my headers

1- By trying to remove out the 4 o2 sensors.. he kinda broke 1.. so he had to force by heating it ( it ripped all the treard.. he tried to work it back a stick with tread and he told me it worked out.. but who knows)
2 - There was a small gap between 1 headers and and exhaust ( even though he had tight every single bolt of it )

You think those item can be the cause of engine light and smell ?
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