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-   -   CCV question (http://www.bimmerfest.com/forums/showthread.php?t=528280)

rwfisher 03-20-2011 10:18 AM

CCV question
 
My wife's X3 had difficulty starting this AM, and when it did finally start it was with a good deal of oil smoke from the exhaust. Checked the oil level then took the car for a spin around the block. Seemed to run OK, no further smoking.

Also checked the battery...it needs replacement, so I'm taking care of that now. Regarding the smoke however, this seems to fit with the CCV sticking that people have described especially since we've had no oil (or smoke!) related problems in the past. My question is the sticking transient, or is it a terminal failure of the part?

Thanks!
R

X3emist 03-20-2011 10:51 AM

I don't think it is sticking
 
Usually when this thing goes I thought it was the tubes/hoses that crack and develop a leak.

szee1 03-20-2011 03:32 PM

Quite a bit of smoke can go with a CCV failure but it seems odd that none of the other symptoms (rough idle and check engine light) are present. The CCV is a overly complicated PCV valve and can allow the engine to ingest oil which can be surprising. Mine suffered from the hole in the hose failure which on occasion would do the oil smoke trick, and once repaired never exhibited the smoke scare again.

rwfisher 03-21-2011 06:35 AM

starting issue...
 
I wonder if the oil smoke/potential CCV issue had anything to do with the low battery. My wife tried to start the car earlier in the day and couldn't get it to crank. I don't know how much effort she put into it, but the car sat in the driveway until the next day when I went out to start it (and that's when I noticed the startup smoke). It did take quite a bit of cranking before it started....

Long story short, a new battery has been installed and I'm keeping a close eye on the oil level and exhaust pipes. I will say cudos to BMW on the OEM battery....it was the original, in service since late 2004.

timarnold 03-21-2011 10:00 AM

This actually doesn't sound like the CVV. I have had the same condition occur once before on my X3 (2005 3.0L). It seems like under the right set of circumstances, one of which is moving the car a very short distance. In my case it was backing the car out of the garage to wash it and then pulling it back in. The next time we tried to start the car, it wouldn't start. I pulled the plugs & it was very obvious that it was incredibly flooded. I used compressed air to blow out the cylinders & with a lot more cranking was able to get it started.

When it started, there was a huge cloud of smoke, but it did very much have a gasoline smell rather than an oil smell. As I said, it happened once & never has repeated.

I assume there is some glitch in the FI software. Interestingly, I have had the same thing happen to my Volvo 850 & my E36 over the last 6 years.

codog2 11-07-2012 03:12 PM

Yes my 05 has done the same thing like 3 times since I've had it. Every time it is after a short start and stop and sit. Like moving the car from the driveway into the garage and then having it sit overnight. I believe it is somewhat common.
Every time it goes away if I stop and restart. Once I had to wait 30 minutes before it would restart

A lot of shaking, white smoke and rotten egg smell. The check engine light usually comes on too

halltristan 11-08-2012 08:32 AM

The easiest way to know whether or not you have a CCV problem is to take a piece of paper and hold it over your oil filler (with the cap removed obviously) while the engine is running. If there is a lot of suction, your CCV is failing. A little suction is normal, but if it tries to swallow the paper, you have a bad CCV. Try this and report the results.

Note: Some people say to use a plastic bag, which I don't recommend simply because you might actually suck it into your engine and then you're really screwed!

In response to the other things you've mentioned, a low battery can cause rough idling but it would have absolutely nothing to do with the smoke. One other thing you need to pay attention to is the way the exhuast smells. When my CCV went out the exhuast smelled like old/bad gasoline. I actually replaced the fuel filter at first thinking I had just got some really bad gas.

codog2 11-08-2012 09:01 AM

check this thread

http://www.bimmerfest.com/forums/sho...993&highlight=

supercourse had a good explanation of "flooding the engine"

chewchewone 11-08-2012 06:50 PM

when I remove my oil cap, the engine shakes, is this normal? Sorry totally different subject.

halltristan 11-08-2012 07:32 PM

Quote:

Originally Posted by chewchewone (Post 7184687)
when I remove my oil cap, the engine shakes, is this normal? Sorry totally different subject.

Can you make a video and post it? This could be serious or it could be nothing.

x3brian 11-08-2012 08:01 PM

Quote:

Originally Posted by chewchewone (Post 7184687)
when I remove my oil cap, the engine shakes, is this normal? Sorry totally different subject.

No that isn't normal. I would bet money on ccv or disa hoses need to be replaced.

Supercourse 11-08-2012 08:46 PM

Quote:

Originally Posted by chewchewone (Post 7184687)
when I remove my oil cap, the engine shakes, is this normal?

Revs are going down because you have introduced a vacuum leak in what is essentially a sealed system.

Air from the removed filler cap will be drawn into the the intake without being metered by the MAF.
(In other engines that use a MAP instead of a MAF, the MAP compensates and the idle speed will be stable or even increase when the oil filler cap is removed.)

In most cases I wouldn't expect the idle to go down enough that the engine shakes and wants to stall.

Might be indicative that a slightly rough idle already exists because of some issue.

Not sure if all M54 and N52 engines should have the same idle speed, whether Auto or Manual?
Mine seems consistent at 800.


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