Exhaust leak??

SilverSlug · 11-19-2021, 03:56 AM

Where the header meets the head? So that would be 8 flanges..?

Are those welded? Or also bolted in?

Denny347 · 11-19-2021, 07:16 AM

Quote:

Originally Posted by SilverSlug

Where the header meets the head? So that would be 8 flanges..?

Are those welded? Or also bolted in?

#3 and #4 in the diagram

SilverSlug · 11-20-2021, 08:27 PM

Ok, so upon double checking today… I'm 99% certain the exhaust leak is at the driver's side manifold/headers.

How difficult is the job to get to them?

Are they welded or also bolted flanges??

spammysammich · 11-20-2021, 08:34 PM

Looking at the placement and confines of the engine bay it looks pretty easy if you are comfortable with pulling the engine or have access to a lift.

spammysammich · 11-20-2021, 08:38 PM

Actually even with dropping the subframe folks are having trouble accessing some of the nuts at the manifold/head junction.

SilverSlug · 11-20-2021, 09:14 PM

Do you mean an engine lift? Would I accessing them from the top or from the bottom?

spammysammich · 11-20-2021, 10:58 PM

Enjoy

SilverSlug · 11-21-2021, 10:33 PM

Thank you for the vid, although it seems like a pita, it appears to be doable.

SilverSlug · 11-21-2021, 10:35 PM

My deeper concern… I wasn't planning on driving her until sorting out the leak, yet I figured a quick drive for a badly needed Sunday wash was okay…

On my way back, I heard the leak get louder, I could really hear the exhaust air pushing out while driving.

Check Engine Light popped up…

P0128 Coolant Themostat
P0305 Cylinder 5 Misfire
P0306 Cylinder 6 Misfire
P0307 Cylinder 7 Misfire
P0308 Cylinder 8 Misfire
P0300 Random Cylinder Misfire

… Reduced Power - Limp Mode

Is this just due to the leak? Is there a chance something else was permanently damaged?

Ajolives · 11-22-2021, 08:20 AM

My passenger side header is leaking pretty bad, real ticky… may have to stay that way, lol. I'd be doing this on my back.

spammysammich · 11-22-2021, 01:40 PM

Quote:

Originally Posted by SilverSlug

My deeper concern… I wasn't planning on driving her until sorting out the leak, yet I figured a quick drive for a badly needed Sunday wash was okay…

On my way back, I heard the leak get louder, I could really hear the exhaust air pushing out while driving.

Check Engine Light popped up…

P0128 Coolant Themostat
P0305 Cylinder 5 Misfire
P0306 Cylinder 6 Misfire
P0307 Cylinder 7 Misfire
P0308 Cylinder 8 Misfire
P0300 Random Cylinder Misfire

… Reduced Power - Limp Mode

Is this just due to the leak? Is there a chance something else was permanently damaged?

Probably due to the leak, not the thermostat though. You probably just need a new one, change the coolant sensor there too while you're at it.

If it was my car, i'd start at the donut gaskets first. They're relatively low hanging fruit to work on, given their age they are probably shot, and while i had the car up in the air I would pull off the driver side wheel well lining and see what header bolts I could get to. OR fix the donut gaskets first, clear codes and see what returns then tear into the header nuts. See if any have rattled loose or fallen off and check for signs of blown gaskets.

spammysammich · 12-29-2021, 03:05 PM

Did this get resolved?

SilverSlug · 12-30-2021, 08:52 PM

Not quite… I got busy during the holidays, and she's been sitting in the garage.

I'm doing the doughnut gaskets first. I took it to my friend's shop, who has a smoke machine to find any leaks, and he said he said it was coming from there.

I'm really curious if that's the only leak though because I was pretty darn sure I had heard the leak from the driver's side headers/manifold.

Doughnut going in first couple weeks of Jan. I'll update here when finally resolved.

11-19-2021, 03:56 AM	#23
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	Where the header meets the head? So that would be 8 flanges..? Are those welded? Or also bolted in?
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11-20-2021, 08:27 PM	#25
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	Ok, so upon double checking today… I'm 99% certain the exhaust leak is at the driver's side manifold/headers. How difficult is the job to get to them? Are they welded or also bolted flanges??
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11-20-2021, 08:34 PM	#26
spammysammich Major 1581 Rep 1,102 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Looking at the placement and confines of the engine bay it looks pretty easy if you are comfortable with pulling the engine or have access to a lift.
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11-20-2021, 08:38 PM	#27
spammysammich Major 1581 Rep 1,102 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Actually even with dropping the subframe folks are having trouble accessing some of the nuts at the manifold/head junction.
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11-20-2021, 09:14 PM	#28
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	Do you mean an engine lift? Would I accessing them from the top or from the bottom?
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11-20-2021, 10:58 PM	#29
spammysammich Major 1581 Rep 1,102 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Enjoy
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11-21-2021, 10:33 PM	#30
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	Thank you for the vid, although it seems like a pita, it appears to be doable.
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11-21-2021, 10:35 PM	#31
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	My deeper concern… I wasn't planning on driving her until sorting out the leak, yet I figured a quick drive for a badly needed Sunday wash was okay… On my way back, I heard the leak get louder, I could really hear the exhaust air pushing out while driving. Check Engine Light popped up… P0128 Coolant Themostat P0305 Cylinder 5 Misfire P0306 Cylinder 6 Misfire P0307 Cylinder 7 Misfire P0308 Cylinder 8 Misfire P0300 Random Cylinder Misfire … Reduced Power - Limp Mode Is this just due to the leak? Is there a chance something else was permanently damaged?
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11-22-2021, 08:20 AM	#32
Ajolives Captain 922 Rep 933 Posts Drives: E90 M3 Join Date: Mar 2019 Location: Tampa iTrader: (0) Garage List 2019 Audi SQ5 [0.00] 2008 BMW M3 [0.00]	My passenger side header is leaking pretty bad, real ticky… may have to stay that way, lol. I'd be doing this on my back.
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12-29-2021, 03:05 PM	#34
spammysammich Major 1581 Rep 1,102 Posts Drives: 2009 E92 M3 Dakar Yellow II Join Date: Oct 2021 Location: Edmonds, WA iTrader: (0) Garage List 2009 BMW M3 [10.00]	Did this get resolved?
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12-30-2021, 08:52 PM	#35
SilverSlug Hey, where have you been all my life? 680 Rep 1,401 Posts Drives: 2011 M3 6MT Join Date: Jul 2018 Location: San Francisco, CA iTrader: (2)	Not quite… I got busy during the holidays, and she's been sitting in the garage. I'm doing the doughnut gaskets first. I took it to my friend's shop, who has a smoke machine to find any leaks, and he said he said it was coming from there. I'm really curious if that's the only leak though because I was pretty darn sure I had heard the leak from the driver's side headers/manifold. Doughnut going in first couple weeks of Jan. I'll update here when finally resolved.
	Appreciate 0 Quote