Explosion in coil pack hole

pierop · 03-12-2016, 05:48 PM

So i took off the engine cover and saw this:

http://m.imgur.com/6upyQsv

Its a 325i 06 e90. 128k miles. No mil. Should i be worried?

Needbmwpartzz · 03-12-2016, 07:00 PM

Got me thinking what happened there but as long as you car runs fine I don't think that's an issue....My OCD would file that down then Jb weld it just to make it look better....still really confused on how that happened

:

tc535i · 03-12-2016, 07:06 PM

Wtf

Kevinl · 03-12-2016, 07:18 PM

Definitely looks like something happend notice that coil looks different than the others its gray on top

pierop · 03-12-2016, 10:10 PM

Quote:

Originally Posted by Kevinl

Definitely looks like something happend notice that coil looks different than the others its gray on top

That's a bosch coil i bought right after I saw this, the old coil had some of the rubber peeled off right at that spot too.

BSM n54iS · 03-12-2016, 11:24 PM

Quote:

Originally Posted by pierop

That's a bosch coil i bought right after I saw this, the old coil had some of the rubber peeled off right at that spot too.

Just curious, what made you want to take the engine cover off?

Cory S · 03-13-2016, 06:24 AM

It's just a casting flaw/imperfection. Relax.

sirdaft1 · 03-13-2016, 08:18 AM

It looks like someone shot a bullet through the side of that coil pack. Very odd, but I wouldn't be too concerned.

Curious, is there a hole in the other side of the casting for that coil as well? Perhaps someone tried drilling it to either remove the coil pack or to zip tie the coil pack down (and in their infinite wisdom, concluded that this was the best option??).

Regardless, I would remove the coilpack, stuff something into where the coilpack was so nothing falls down there, then sand and fill that hole (jb weld). It might be overkill but the last thing you want is for water to enter into that area and get down into the spark plug and mess up the connection between the coil and plug.

You see something new everyday on this cars! G/L!

pierop · 03-13-2016, 09:04 AM

Quote:

Originally Posted by Black n54is

Just curious, what made you want to take the engine cover off?

Well the car has been idling a little rougher than usual in gear at stop signs/traffic lights.
So the easiest thing i could check were the spark plugs(they were running rich).

pierop · 03-13-2016, 09:16 AM

Quote:

Originally Posted by sirdaft1

It looks like someone shot a bullet through the side of that coil pack. Very odd, but I wouldn't be too concerned.

Curious, is there a hole in the other side of the casting for that coil as well? Perhaps someone tried drilling it to either remove the coil pack or to zip tie the coil pack down (and in their infinite wisdom, concluded that this was the best option??).

Regardless, I would remove the coilpack, stuff something into where the coilpack was so nothing falls down there, then sand and fill that hole (jb weld). It might be overkill but the last thing you want is for water to enter into that area and get down into the spark plug and mess up the connection between the coil and plug.

You see something new everyday on this cars! G/L!

No hole on the other side, but the old coil had some of the rubber peeled off parallel to that spot. See pic

BSM n54iS · 03-13-2016, 12:20 PM

Quote:

Originally Posted by pierop

Well the car has been idling a little rougher than usual in gear at stop signs/traffic lights.
So the easiest thing i could check were the spark plugs(they were running rich).

Any codes?

tc535i · 03-13-2016, 01:10 PM

Could be causing a vacuum leak. Google 335 cracked valve cover. Usually happens at the edges, I dunno what happened here.

Speed_Addict · 03-13-2016, 09:46 PM

Looks to me like someone pulled the top off of one of the coils and then tried to pound a screw driver through it to try and make themselves a handle to pull out the rest of it with. May have pounded that screwdriver a not too deep? That is my guess...

Cory S · 03-13-2016, 10:08 PM

It's just a casting flaw you happen to find......... Doesn't create any issues really.

Needbmwpartzz · 03-18-2016, 11:41 AM

Quote:

Originally Posted by Speed_Addict

Looks to me like someone pulled the top off of one of the coils and then tried to pound a screw driver through it to try and make themselves a handle to pull out the rest of it with. May have pounded that screwdriver a not too deep? That is my guess...

That's a pretty good guess...I'm sure some don't come off so easy....that's why I use dielectric grease.

motoguy128 · 03-18-2016, 02:00 PM

How about this wild explanation.

The casting flaw allowed moisture to get in there in there when cool, then once warm, sealed up the small leak. The moisture boiled off and generated enough pressure to blow open the flaw. It also damaged the outside of the coil when the steam rushed out.

Cory S · 03-18-2016, 02:07 PM

Quote:

Originally Posted by motoguy128

How about this wild explanation.

The casting flaw allowed moisture to get in there in there when cool, then once warm, sealed up the small leak. The moisture boiled off and generated enough pressure to blow open the flaw. It also damaged the outside of the coil when the steam rushed out.

I would think the coil pack would simply be pushed up and out a little before the pressure level was high enough to blow through the aluminum casting..

sea6speed · 03-18-2016, 02:20 PM

Hard to tell from the photo but it sort of looks like the coil was arcing. Is there a tiny pinhole in the jacket? Slicing that sucker open should give some indication. If that's the case the spot likely became overheated, weakening the metal.

fazman · 03-18-2016, 02:51 PM

Quote:

Originally Posted by pierop

So i took off the engine cover and saw this:

http://m.imgur.com/6upyQsv

Its a 325i 06 e90. 128k miles. No mil. Should i be worried?

You need more NOS, the big bottles.

yegich · 03-29-2016, 10:32 PM

I have similar issue with my 2006 bmw 330i 110k miles. Engine works fine but coil pack hole looks like this

pierop · 04-05-2016, 09:24 PM

Quote:

Originally Posted by yegich

I have similar issue with my 2006 bmw 330i 110k miles. Engine works fine but coil pack hole looks like this

what do you idle at? any loss of power? rough idle?

Brettb1234 · 04-05-2016, 11:49 PM

Quote:

Originally Posted by fazman

Quote:

Originally Posted by pierop

So i took off the engine cover and saw this:

http://m.imgur.com/6upyQsv

Its a 325i 06 e90. 128k miles. No mil. Should i be worried?

You need more NOS, the big bottles.

NOS?! You'll blow yourself to pieces. I've seen the way drive, you got a heavy foot.

03-12-2016, 05:48 PM	#1
pierop Enlisted Member 16 Rep 34 Posts Drives: 325i e90 Join Date: Mar 2016 Location: Long Island, NY iTrader: (0)	Explosion in coil pack hole So i took off the engine cover and saw this: http://m.imgur.com/6upyQsv Its a 325i 06 e90. 128k miles. No mil. Should i be worried?
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03-12-2016, 07:00 PM	#2
Needbmwpartzz Colonel 851 Rep 2,793 Posts Drives: 2009 bmw 328i x-drive Join Date: Feb 2014 Location: Kitchener/Waterloo iTrader: (0)	Got me thinking what happened there but as long as you car runs fine I don't think that's an issue....My OCD would file that down then Jb weld it just to make it look better....still really confused on how that happened:
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03-12-2016, 07:06 PM	#3
tc535i Lieutenant Colonel 215 Rep 1,818 Posts Drives: 2007 335i, 2001 330i, 1995 M3 Join Date: Sep 2013 Location: West Los Angeles iTrader: (1)	Wtf
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03-12-2016, 07:18 PM	#4
Kevinl Lieutenant 210 Rep 563 Posts Drives: 2017 BMW M3 Alpine White 6MT Join Date: Aug 2014 Location: Phoenix iTrader: (0)	Definitely looks like something happend notice that coil looks different than the others its gray on top
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03-13-2016, 06:24 AM	#7
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	It's just a casting flaw/imperfection. Relax.
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03-13-2016, 08:18 AM	#8
sirdaft1 Brigadier General 2205 Rep 3,338 Posts Drives: X5 & E90 WTCC Racecar (SOLD) Join Date: Feb 2013 Location: Chicago West Burbs iTrader: (9) Garage List 1989 BMW 325i Track ... [10.00] 2007 E90 WTCC Wideb ... [9.67] 2012 BMW X5 xDrive35i [9.50]	It looks like someone shot a bullet through the side of that coil pack. Very odd, but I wouldn't be too concerned. Curious, is there a hole in the other side of the casting for that coil as well? Perhaps someone tried drilling it to either remove the coil pack or to zip tie the coil pack down (and in their infinite wisdom, concluded that this was the best option??). Regardless, I would remove the coilpack, stuff something into where the coilpack was so nothing falls down there, then sand and fill that hole (jb weld). It might be overkill but the last thing you want is for water to enter into that area and get down into the spark plug and mess up the connection between the coil and plug. You see something new everyday on this cars! G/L!
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03-13-2016, 01:10 PM	#12
tc535i Lieutenant Colonel 215 Rep 1,818 Posts Drives: 2007 335i, 2001 330i, 1995 M3 Join Date: Sep 2013 Location: West Los Angeles iTrader: (1)	Could be causing a vacuum leak. Google 335 cracked valve cover. Usually happens at the edges, I dunno what happened here.
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03-13-2016, 09:46 PM	#13
Speed_Addict Second Lieutenant 34 Rep 210 Posts Drives: Crimson Red 335i Coupe Join Date: May 2008 Location: Northwest iTrader: (1)	Looks to me like someone pulled the top off of one of the coils and then tried to pound a screw driver through it to try and make themselves a handle to pull out the rest of it with. May have pounded that screwdriver a not too deep? That is my guess...
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03-13-2016, 10:08 PM	#14
Cory S Major 305 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	It's just a casting flaw you happen to find......... Doesn't create any issues really.
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03-18-2016, 02:00 PM	#16
motoguy128 Second Lieutenant 38 Rep 254 Posts Drives: 2006 325i Join Date: Aug 2015 Location: SW Michigan iTrader: (0)	How about this wild explanation. The casting flaw allowed moisture to get in there in there when cool, then once warm, sealed up the small leak. The moisture boiled off and generated enough pressure to blow open the flaw. It also damaged the outside of the coil when the steam rushed out.
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03-18-2016, 02:20 PM	#18
sea6speed First Lieutenant 93 Rep 343 Posts Drives: '10 335i Msport 6M / E34 535i Join Date: Mar 2013 Location: Seattle iTrader: (0)	Hard to tell from the photo but it sort of looks like the coil was arcing. Is there a tiny pinhole in the jacket? Slicing that sucker open should give some indication. If that's the case the spot likely became overheated, weakening the metal.
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03-29-2016, 10:32 PM	#20
yegich Registered 0 Rep 1 Posts Drives: 2006 bmw 330i Join Date: Dec 2015 Location: Irvine, CA iTrader: (0)	I have similar issue with my 2006 bmw 330i 110k miles. Engine works fine but coil pack hole looks like this Last edited by yegich; 03-29-2016 at 10:50 PM..
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