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Old 03-28-2020, 03:35 PM   #1
rozdogjr
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Maybe a blown gasket?

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Long story short, Driving to work 2 days before Christmas and after driving for about 3 mins i start to notice the car was struggling to shift gears and it was losing power, then i noticed a huge amount of pure white smoke starts coming from every where so I pulled it over and had it towed back home. I get home and the oil cap was completely white with moisture. It hadn't been moved since about a week ago. I finally have some time with the virus closing down my work and I took off the valve cover and this is what i found. Now to preface this, There is no smell of coolant or anything it smells more like burnt metal than anything. Also the coolant shows no sign of oil or anything. And yes i tried to start it and it would only crank a couple times then stop. I checked the spark plugs and they were covered in oil (no smell or sign of coolant in the combustion chamber). Im going to continue to take apart the top end until so it's easier to work on if it is the headgasket that blew.

Any help would be appreciated!
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Old 03-28-2020, 03:50 PM   #2
Effduration
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How cold was it 2 days before Christmas? I am inclined to think it is your CCV...in cold weather, a tired CCV can clog, freeze up, and suck oil into the intake. How old is your CCV?
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Old 03-28-2020, 04:19 PM   #3
rozdogjr
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How cold was it 2 days before Christmas? I am inclined to think it is your CCV...in cold weather, a tired CCV can clog, freeze up, and suck oil into the intake. How old is your CCV?
it was about 20F and also Im assuming never since the previous dealership didnt have any service info neither did my local BMW dealership, and now that you mention that i took off the disa control unit and found this Click image for larger version

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also to be 100% honest I didnt even know where the CCV unit was on the engine but here's a pic of it. So im assuming it sucked up oil into the intake which burnt it while going through the combustion chamber then exhaust (thus the white smoke) and to remedy the problem I replace the CCV system and clean out my intake manifold and hope for the best?
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Old 03-28-2020, 05:42 PM   #4
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I would take the spark plugs out and inspect the chambers.


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Old 03-28-2020, 05:52 PM   #5
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Yeah, all the signs of a classic CCV failure. As long as you shut it off soon enough, there should be no reason you lifted the head by trying to compress oil (it won't compress oil and the results are lifting the head off the block damaging the head gasket).

Pull the plugs and crank it over to purge any oil in the cylinders. Run a compression check or leak down test to see if there has been permanent damage.

You may get lucky but you will be dealing with oil in the exhaust for hours. Keep an eye on the catalytic converters, they hate oil.
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Last edited by Overboost; 03-28-2020 at 05:55 PM.
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Old 03-28-2020, 07:34 PM   #6
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Yeah, all the signs of a classic CCV failure. As long as you shut it off soon enough, there should be no reason you lifted the head by trying to compress oil (it won't compress oil and the results are lifting the head off the block damaging the head gasket).

Pull the plugs and crank it over to purge any oil in the cylinders. Run a compression check or leak down test to see if there has been permanent damage.

You may get lucky but you will be dealing with oil in the exhaust for hours. Keep an eye on the catalytic converters, they hate oil.
^^^I agree with this.
The yellow mayo is the classic condensation/oil mix and the oily dirty intake chamber is common.

I would not pull any more parts off until you’ve cleaned the plugs and cylinders, and done comp and LD tests.
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Old 03-28-2020, 09:21 PM   #7
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When my CCV went, it also left the crankcase get pressurized and my valve cover gasket leaked oil on the passenger side - a lot. So once ya get things figured out, I would replace it also.
Look up CCV delete. That's the rout I went.
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Old 03-28-2020, 10:34 PM   #8
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Wow had no idea the CCV can cause a head gasket to blow. Than again, I never thought a misfire can cause a head gasket to blow either(what happened to me in 2010). Fun times.

What does one look for when a CCV is failing? I'd rather replace mines before this happens.
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Old 03-29-2020, 05:01 AM   #9
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Wow had no idea the CCV can cause a head gasket to blow. Than again, I never thought a misfire can cause a head gasket to blow either(what happened to me in 2010). Fun times.

What does one look for when a CCV is failing? I'd rather replace mines before this happens.
The common failure is the CCV getting filled up with mayo which is condensation and oil mixture. The build up is from short drives and the engine never reaching operating temperatures to burn off the condensation.

When winter hits and ambient temperatures are below 30 degrees F, the mayo freezes and the hoses and ports are clogged resulting in the intake manifold vacuum sucking the oil from the oil pan through the dipstick tube directly into the engine.

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Old 03-29-2020, 05:08 AM   #10
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I saw the mayo in that video link screen cap, and thought of the old mustard TV ad.
"Excuse me good sir, but do you have any Grey Poupon?"

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Old 03-29-2020, 06:33 AM   #11
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I saw the mayo in that video link screen cap, and thought of the old mustard TV ad.
"Excuse me good sir, but do you have any Grey Poupon?"
Ha, we are showing our age. Only us old guys will remember that commercial.
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Old 03-29-2020, 11:42 PM   #12
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CCV failed and probably flooded the cylinders with oil. I'd pull plugs, inspect plugs for fouling, replace as needed, then crank the engine over without plugs to blast most of the oil out. New CCV is definitely in check.
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