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Old 09-04-2012, 12:25 PM   #1
johncarl
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Blue Ridge Pearl

Default Help with header install aftermath

This past weekend I installed some Ebay OBX headers on my 2005 impreza RS. I was happy with the results at first but after taking it out for a spin I quickly noticed a loud raspy sound coming from the headers, like there is a gap somewhere between the motor / headers / cat.

I decided to take it into the shop for them to take a look at it, but they said they could not look at it until Friday. They reassured me it would probably not cause any harm to drive it until then.

Then after driving my car to work I noticed that I was burning through my remaining tank of gas at a noticeable rate.

what should I do here? I could possibly take it into another shop today, or just wait until I can take it into the dealership shop on Friday. Should I just have the old headers put back on?

Thanks for your advice.
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Old 09-04-2012, 12:33 PM   #2
Sleeper_RS
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What I think is happening, is you have an exhaust leak real bad before ur upstream 02 sensor. It's reading lean, because of the exhaust leak, and trying to add more fuel to compensate, hence the horrible has mileage. That's my 2 cents. Get it fixed as soon as possible, but it should be okay for a couple days.
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Old 09-04-2012, 12:36 PM   #3
Sleeper_RS
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I also have an 05 RS with obx header.
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Old 09-04-2012, 12:37 PM   #4
johncarl
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Could it just be a matter of not bolting the headers down 100%? I was unable to properly torque all the bolts to the proper spec (25 ft/p) during the install.
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Old 09-04-2012, 01:10 PM   #5
GEE-OTTO
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2009 Legacy GT
OBP

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Quote:
Originally Posted by johncarl View Post
Could it just be a matter of not bolting the headers down 100%? I was unable to properly torque all the bolts to the proper spec (25 ft/p) during the install.
So you installed the headers and didnt get to tighten them down per the instructions. So first check connections, if they are loose tighten them. Second if you tighten them down and still have a leak you may have a warped flange. If the flange is warped you can try to true it up OR return it as a defective header for a new one.
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Old 09-04-2012, 05:43 PM   #6
johncarl
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Default

Looks like one of the bolts was just not tightened down enough over the back gasket.

Sleeper_RS: did you also have your car tuned after installing the headers? I have been talking to a tuner that claims it will make the revs "smoother"... wondering if you experienced this.
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Old 09-04-2012, 06:26 PM   #7
GEE-OTTO
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Quote:
Originally Posted by johncarl View Post
Looks like one of the bolts was just not tightened down enough over the back gasket.

Sleeper_RS: did you also have your car tuned after installing the headers? I have been talking to a tuner that claims it will make the revs "smoother"... wondering if you experienced this.
A tune will help maximize the addition.
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Old 09-05-2012, 12:31 AM   #8
Sleeper_RS
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Johncarl, I have not yet had a tune, but it did smoothen it out a bit. The flat spot around 3800-4100 is still there, just less prominent. I did pair it with an intake and no cats. waiting for 1500 grinds, valve springs, and then I will get a tune and see how much that wakes it up.
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Old 09-05-2012, 12:55 AM   #9
johncarl
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Blue Ridge Pearl

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Sleeper_RS: Ill be watching your progress.

Personally, Im headed for a tune with just a hybrid intake and headers. Not looking for huge gains, I just want a dependable car with a little personality.
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Old 09-05-2012, 01:08 PM   #10
Sleeper_RS
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I hear ya man. Well I might start a thread for my build, anyone interested?
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Old 09-05-2012, 04:13 PM   #11
Steve2.5i
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Quote:
Originally Posted by Sleeper_RS
I hear ya man. Well I might start a thread for my build, anyone interested?
I say do it lol
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Old 09-05-2012, 04:52 PM   #12
Sleeper_RS
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Alright will do ^^^
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Old 09-05-2012, 07:18 PM   #13
johncarl
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Blue Ridge Pearl

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Quote:
Originally Posted by Sleeper_RS View Post
I hear ya man. Well I might start a thread for my build, anyone interested?
Seconded.
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Old 09-05-2012, 08:04 PM   #14
Sleeper_RS
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I just posted it. It will take some time to get all of my build up, but it's here. It's called "Sleeper_RS build"
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Old 09-06-2012, 11:17 AM   #15
klaus_b2
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do you have the o2 sensors in as well? it could be coming from the holes where the o2s go
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