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Old 07-18-2002, 10:33 AM   #1
dead-eye
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Default Exhaust header with only 2 bolts; what are the dangers?

I was trying to install the STi engine mounts and in the process of re-installing the nuts to the exhaust headers, one of the nuts got stuck. I assumed I had started to cross thread it so as I tried to remove it, the entire stud and nut assembly came off. I couldn't force the nut off for fear of damaging the stud so I attached the exhaust header with only 2 nuts instead of 3. How long can I drive like this (I'm waiting for replacement parts)? What are the dangers in driving the car in this condition? Any help would be GREATLY appreciated.
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Old 07-18-2002, 12:32 PM   #2
STiTuner
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I doubt you'll warp anything if its just fro a few days.

you'll probably get a pretty nice leak. just make sure your gaskets are in good.

Brad
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Old 07-18-2002, 01:44 PM   #3
dead-eye
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Brad,
Thanks for the info. The gaskets looked like they were in good shape. Would there be any noticeable loss in boost due to the leakage? I've been keeping an eye on my boost gauge and haven't noticed anything yet.
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Old 07-18-2002, 02:12 PM   #4
HndaTch627
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exhaust leak, which if it gets bad enough will burn a valve.

jeremy
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Old 07-18-2002, 03:32 PM   #5
Surboo
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I drove my car like that for a good 10,000 miles before i found it. I knew i had an exhaust leak somewhere because it was horribly loud, but i couldnt find where it was. Even the Subaru shop around here said they looked for it and couldnt find it... I finally noticed a missing nut when i was working under there. Hmm, what are the symptoms of a burned valve??
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Old 07-18-2002, 04:14 PM   #6
8Complex

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Why don't you get a bolt that fits in there? Make sure it's grade 10.9.
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Old 07-18-2002, 05:07 PM   #7
blaster88
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Why not just screw the stud back in, nut and all?
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Old 07-18-2002, 05:57 PM   #8
8Complex

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blaster - I think it wouldn't seal it cause the nut is locked on the stud at one place.
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Old 07-18-2002, 06:26 PM   #9
blaster88
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If you screw it back in, if the stud bottoms out, then the nut should start screwing back down.
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Old 07-18-2002, 07:07 PM   #10
dead-eye
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blaster88,
That's exactly what I thought but when I tried it there was this awfully screeching noise; I stopped after a few seconds because I thought I might strip the threads. I'm going to Pepboys tonight to see if they have a comparable stud.
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