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Old 11-15-2012, 08:31 PM   #1
stevodotorg
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Question I'm pretty sure this isn't normal, camshaft bearing destroyed.

UPDATE OF WIN:

So, for anyone that runs into this post, I never did find out what was wrong with my engine, but I had to have it replaced. I got an excellent deal on an engine and installment from someone trust worthy. All I can do is recommend that you take photos and post to see what others say. If this has happened to your car, I'm sorry. Feel free to post on here if you find out what went wrong and you have a similar issue to what my car had.

Cheers!


MAJOR UPDATE (11/19/12)

Who needs a new engine? this guy needs a new engine.

I have been told I either need a new head, or a new used engine of course, will be the better deal. That's where I'm at.. looks like a weekend project coming up in a couple weeks.

Original Post:

I've been having some crazy idle problems recently and nothing happens when I disconnect or switch out the ignition coil and spark plug on cylinder 3.. Today I opened up the head and saw this, and I'm pretty darn sure it isn't normal. The only code that DIS is giving is: P0014. Does anyone have a clue what happened? This seems really bad. Thanks e46 friends.

(Update) Detail shots: Notice in the close ups where it's black, the bearing cover (I think that's what it is?) is warped, and the metal on it has expanded out and shows signs that it's ground up toward the bottom of it.

Detailed photos:
https://www.dropbox.com/s/91dyri4pob...2018.02.16.jpg - upclose clean bearing cover (for comparison)
https://www.dropbox.com/s/52h8w1jczp...2018.01.26.jpg - upclose destroyed bearing cover
https://www.dropbox.com/s/w0m4t1lvhv...2018.02.00.jpg - upclose destroyed bearing cover
https://www.dropbox.com/s/gjm7yupqg6...2018.00.40.jpg - upclose destroyed bearing cover
https://www.dropbox.com/s/6jvp08rfjx...2017.17.09.jpg - wider view of black/burnt area

(Update 2) - Not looking good at all - When I removed the bolts to the camshaft bearing cap #3, the bolts were already WAY loose.. which is very strange.. perhaps part of the problem that caused this? or the problem caused the bolts to loosen?

Photos:
https://www.dropbox.com/s/fk27uoj996...2018.43.22.jpg - Cylinder #3 area, camshaft bearing cap #3 removed
https://www.dropbox.com/s/2zzxq4ow2y...2018.43.38.jpg - Cylinder #3 area, camshaft bearing cap #3 removed
https://www.dropbox.com/s/60ocds9fpw...2018.43.09.jpg - Cylinder #4 area, camshaft bearing cap #4 removed
https://www.dropbox.com/s/0lmpn4mh8n...2018.46.11.jpg - Cylinder #1 area, camshaft bearing cap #1 removed for comparison (nice and clean)
https://www.dropbox.com/s/lgg3ygc6s8...2018.49.10.jpg - Camshaft bearing caps, (front to back) #3, #4, #1 .. stomach dropped.

(Update 3) - Vanos has dark spots on it? - how are the two issues related? -- actually just did an image search on vanos, found that a lot sometimes look dark, and also confirmed by a couple users on this thread (thanks guys)

Photos:
https://www.dropbox.com/s/plkytxs1q3...2010.43.45.jpg
https://www.dropbox.com/s/x9006wwrn5...2010.43.30.jpg

Camshaft needs to be replaced, and bearing ledge exhaust needs to be replaced, the question is:

- What caused this?
- If I replace the camshaft and surrounding parts, will this happen again?

Thank you everyone
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Last edited by stevodotorg; 12-26-2012 at 08:06 PM.
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Old 11-15-2012, 08:52 PM   #2
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I didn't realize how blind I am. I don't see it I guess. BTW, Mine looked way worse when I removed the valve cover. So much sludge that when I Finally got it to "peal" off, most of it crumbled back down in to the head. Nothing 2 days worth of tooth brush and xylene scrubbing couldn't take care of with the aid of a shop vac.

Did you remove the valve cover because it was idling bad?
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Old 11-15-2012, 08:56 PM   #3
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Pics are too far away and not enough detail to highlight your problems.
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Old 11-15-2012, 09:06 PM   #4
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the burn marks around 3?
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Old 11-15-2012, 09:07 PM   #5
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the burn marks around 3?
yes.. I'm uploading detailed photos now, and I just found something not good at all, you'll see..
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Old 11-15-2012, 09:24 PM   #6
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Links to dropbox that include close ups of the issue are now at the top of the thread. Thanks guys, hopefully we can figure this out
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Old 11-15-2012, 09:07 PM   #7
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You say you switched out the coil pack for cylinder 3. I am assuming this means you either put in a new one or just swapped it with a different one. Did you inspect the connector for the coil pack?

Last edited by Encryption76; 11-15-2012 at 09:07 PM.
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Old 11-15-2012, 09:18 PM   #8
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You say you switched out coil packs. I'm assuming you are chasing a misfire?
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Old 11-15-2012, 09:26 PM   #9
stevodotorg
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You say you switched out coil packs. I'm assuming you are chasing a misfire?
Misfire? This seems to be a little more than a misfire take a look at the new photos I posted
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Last edited by stevodotorg; 11-15-2012 at 09:27 PM.
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Old 11-15-2012, 09:25 PM   #10
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Yeah. Your right. Thats not good at all.

Last edited by Encryption76; 11-15-2012 at 09:27 PM.
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Old 11-15-2012, 09:33 PM   #11
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I don't know about that one really. Someone with some good experience is going to have to come give you options. I would imagine that it is going to either involve removing the cam or the head or both. Bet that made you sick to your stomach seeing that.
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Old 11-15-2012, 09:34 PM   #12
stevodotorg
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I don't know about that one really. Someone with some good experience is going to have to come give you options. I would imagine that it is going to either involve removing the cam or the head or both. Bet that made you sick to your stomach seeing that.
You have no idea
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Old 11-15-2012, 09:42 PM   #13
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We all know what sinking feeling is like. Sorry.

What else can that discoloration be except a failed bearing that is overheating and burning things?
I'd say run this no more and do what it takes to get a used head. or replace the bearing and probably the cam.

Please let us know what happens here.
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Old 11-15-2012, 09:57 PM   #14
stevodotorg
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New photos incoming.. and more money too, sigh.
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Old 11-15-2012, 09:53 PM   #15
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WOW! Condolences are definately in order. Were there any engine noises associated with this?
I can't say for sure, but I think a cylinder head and camshaft are in order.
As to what caused it? I'm morbidly curious.
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Old 11-15-2012, 10:00 PM   #16
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As to what caused it? I'm morbidly curious.
Betting lack of freq oil changes along with high revs.
Perhaps lo oil pressure?
Weak pump?
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Old 11-15-2012, 10:10 PM   #17
stevodotorg
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Betting lack of freq oil changes along with high revs.
Perhaps lo oil pressure?
Weak pump?
I change the oil regularly with the right stuff. High revs, rarely, low oil pressure light (red) came on 3 weeks ago, pulled over and had the car towed, started up a couple days later with no oil light.. possible that something else caused this which of course changed the oil pressure.

I did change the valve cover gasket 3 months ago, but shows no sign of leaks, is it possible something fell down in there during the process?
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Old 11-15-2012, 10:19 PM   #18
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Originally Posted by stevodotorg View Post

I did change the valve cover gasket 3 months ago, but shows no sign of leaks, is it possible something fell down in there during the process?
Unlikely a blocked return would cause this. You'd still get pressure to the bearing.

+1 on Zell's hypothesis of oil pump nut.

Gotta check all the others for pre-fail.

Last edited by Stinger9; 11-15-2012 at 10:20 PM.
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Old 11-15-2012, 10:23 PM   #19
stevodotorg
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Unlikely a blocked return would cause this. You'd still get pressure to the bearing.

+1 on Zell's hypothesis of oil pump nut.

Gotta check all the others for pre-fail.
But will the car run without an oil pump nut? And how would an oil pump nut cause all of this to happen?
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Old 11-15-2012, 10:16 PM   #20
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Originally Posted by Stinger9 View Post
Betting lack of freq oil changes along with high revs.
Perhaps lo oil pressure?
Weak pump?
Maybe. But there doesn't appear to be any sludge in there.
And did you see the nut holding the cam bearing cap? It's melted!
That area got HOT! Almost hard to believe the cam didn't break.
I'm not familiar with this oiling system but oil starvation usually shows
up farthest from the pump. This damage is dead center of the engine.
I would be hesitant to spend the money on a head and cam only to
have it happen again. I think this damage is the result and not the cause of this problem.
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