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Old 07-25-2003, 06:47 AM   #1
Jard
In the silly seat
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Member#: 34935
Join Date: Apr 2003
Chapter/Region: MAIC
Location: Silver Spring, MD
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SPB- 2002 ****ing
WRX again

Default TWE Header Installation

I will be installing a full headerback system on my car tonight. TWE Headers and Cat, mated to Brullen quiet Catback.

Does anyone know the correct specs to torque the bolts holding the header to the block?

Does anyone know the correct specs to torque the rest of the bolts holding everything together?

I tried searching, but putting header and torque together doesn't get you much except people asking about power gains.

Thanks in advance.

~Jared
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Last edited by Jard; 07-26-2003 at 10:15 PM.
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Old 07-25-2003, 09:01 AM   #2
bigdweeb
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I have the manuals on my computer at home... I checked my computer at work, but I don't have that section for some reason. If no one gets back to you with the proper specs, I will check when I get home. There may be a chance that I have the manual on a CD in my car, so I may be able to check at lunch time.
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Old 07-25-2003, 09:13 AM   #3
DanzBorin
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I just tightened them as much as I could... works fine... new gaskets between the heads and the headers are strongly recommended... If you don't replace there is a good chance for a leak...
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Old 07-25-2003, 09:56 AM   #4
MY99 2.5GT
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Even though your car is pretty new get ready to work to get those header bolts off. Use de-ruster

Don't be afraid if a few of the header bolts back out. Make sure you have some high temp Loctite on hand.

A good measure to take with new headers is to use new gaskets as mentioned above. Another good idea is a bead of High Temp RTV for a perfect seal.


Let us know how those TWE Headers work out. Which ones did you get?

Brad
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Old 07-25-2003, 10:04 AM   #5
Jard
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They are the v.3 super stock headers. I will try to get my friend with a digital camera to come over and take pics during the install. I'm not sure how long it will take, but I'm getting mentally prepared all day at work.
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Old 07-25-2003, 12:57 PM   #6
bigdweeb
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I had the manual CD in my car... Here's the specs for a 2000 RS. I would imagine they are close if not the same. I don't think there were any major exhaust redesigns for the RS post 2001.

Nuts connecting the header to the engine:
30+/-5 N-m (22.4+/-3.6 ft-lb)

Nuts and bolts connecting the cat section to the header:
30+/-5 N-m (22.4+/-3.6 ft-lb)

Spring bolt assembly connecting the cat section to the midpipe:
18+/-5 N-m (13.0+/-3.6 ft-lb)

Nuts and bolts connecting the midpipe to the axle-back section:
48+/-5 N-m (35.4+/-3.6 ft-lb)
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Old 07-25-2003, 10:10 PM   #7
Dr Ken
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Cool Jared,
How's the flange between the cat and the mid pipe, isn't that something that has to be welded? I'd be interested if there was clearance issues with the drain-thingie.

Say, anyone..... wouldn't some anti-sieze stuff be a good idea on these bolts so next time they'd be easier to loosen?
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Old 07-26-2003, 12:55 PM   #8
Jard
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Quote:
Originally posted by Dr Ken
Cool Jared,
How's the flange between the cat and the mid pipe, isn't that something that has to be welded? I'd be interested if there was clearance issues with the drain-thingie.

Say, anyone..... wouldn't some anti-sieze stuff be a good idea on these bolts so next time they'd be easier to loosen?
The flange on the cat and mid-pipe were already correct because I bought the system from another NASIOC member who was using it on his car.

I installed the whole mess yesterday into this morning, and ran into a few issues. I'm getting a slight exhuast leak where the cat meets the mid-pipe and a pretty nasty rattle. This is caused by the cat hitting some piece of the transmission mount assembly. This pushes the flange on the cat downwards where it can't mate exactly with the flange on the mid-pipe. There is also no way that the second 02 sensor wire is long enough to connect back to the wiring harness. Right now I'm running with just the first 02 sensor connected and throwing a CEL. Hopefully I'll get these issues resolved this week, and get some video clips up.

I'm definitely learning a lot about being a shadetree mechanic.
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Old 07-26-2003, 08:13 PM   #9
Dr Ken
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How's it coming?
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Old 07-26-2003, 10:05 PM   #10
Jard
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Quote:
Originally posted by Dr Ken
How's it coming?
I found out from TWE that I have a cat that is designed for the older Impreza. This is definitely causing my 02 sensor problems, and most likely my rattling problem also. I will keep you all posted as soon as I hear more from TWE.

p.s. TWE is a great company to work with. I sent an email this morning and bounced messages back and forth during the day today. Customer service on a Saturday is hard to find. A+ in my book.
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Old 07-29-2003, 03:11 PM   #11
Dr Ken
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SilvAr

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Eeewh, is it tweakable or do you need new cat 'n stuff? So close!
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