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Old 03-07-2011, 09:00 AM   #1
Top_Bunk
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CCV Experts chime in!

Hi all,

Since it got cold here in Ohio, I've been having a very slightly rough idle when the engine is cold. Nothing severe (it doesn't register on the tach) but the engine isn't as silky smooth as it should be. Once it has been running for a minute, it runs perfectly.

This does not affect driving at all. There are no misses and throttle response is as snappy as it should be. This only happens on cold days.

Mid-last week, when I started my car in the morning, I was greeted with a brief puff of oil smoke. This has never happened before or since. I have 58k on the clock.

I'm about to order the oil separator kit from ECS. I'm pretty confident in my diagnosis, but can never be too sure.

This sound like CCV to you guys?

Thanks,


EDIT: Forgot to mention, I've just done Inspection 2 and everything associated with it, so that rules out a few maintenance items.

Last edited by Top_Bunk; 03-07-2011 at 09:08 AM.
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Old 03-07-2011, 10:25 AM   #2
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Hi: When mine went, a cold day, half of the oil disappeared in a minute or two. It sure got rid of the lowlife in the truck driving one carlength behind me.

Jack
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Old 03-07-2011, 11:16 AM   #3
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Hi: When mine went, a cold day, half of the oil disappeared in a minute or two. It sure got rid of the lowlife in the truck driving one carlength behind me.

Jack

That's what I'm afraid of... I'm hoping to prevent something like that from happening!

Sounds like a fun experience...
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Old 03-07-2011, 12:12 PM   #4
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I had even more severe starting problems (sputtering, stall ... ) on cold morning, with a few codes. I discovered that my lower intake boot was leaking and also found a broken hose between the CCV and the oil dip stick. See this link to check it out:

http://forum.e46fanatics.com/showthread.php?t=773551

I went ahead and changed my CCV and all the associated hoses any way because of high mileage. That fixed my all my problems and clear all the codes.

Since you are getting white smoke, may be you need to change the CCV but check out and replace that hose first if you don't have the time to do the complete job.
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Old 03-07-2011, 12:55 PM   #5
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Cool, sounds like that is what I need to do.

I just now got another big puff of oil smoke when starting my car. No rough idle this time, but it is a bit warmer today. One big puff of oil smoke, and then it burns clean for the rest of the drive. Hmm....
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Old 03-07-2011, 01:37 PM   #6
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Mine would puff out blue smoke every 4 or 5 days at first start-up. It was more than a puff of smoke that you would get from worn valve stem seals. I replaced the CCV and all hoses and it has never occurred again.
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Old 03-07-2011, 02:29 PM   #7
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Check your plugs for fouling if you want to diagnose your oily smoke. If you have oily plugs, CCV is bad.
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Old 03-07-2011, 02:41 PM   #8
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Mini started like that, then as the days got colder, i was smelling burnt oil and the oil light would flickr, i just removed the whole system, car runs great without it, and you never have to worry about a dirty intake manifold again
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Old 03-07-2011, 02:52 PM   #9
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Mine would puff out blue smoke every 4 or 5 days at first start-up. It was more than a puff of smoke that you would get from worn valve stem seals. I replaced the CCV and all hoses and it has never occurred again.
This is exactly what I'm experiencing. Thank you, this helps a lot.

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Check your plugs for fouling if you want to diagnose your oily smoke. If you have oily plugs, CCV is bad.
Yah... they are brand new plugs, too. I might have 500 miles on them.

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Mini started like that, then as the days got colder, i was smelling burnt oil and the oil light would flickr, i just removed the whole system, car runs great without it, and you never have to worry about a dirty intake manifold again
Really??? I didn't realize our cars run without these. In either case, I've ordered parts. Parts will be here on Friday. I'll wrap the hose in duct tape in the meanwhile.
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Old 03-21-2011, 03:59 PM   #10
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I have noticed this same phenomenon on my 01 330Ci...puff of smoke at start up...sometimes it does it while I'm driving also...would this still be the CCV or am I looking at something different since it happens more often that just start up. I'm brand new to the e46's so any help is much appreciated!
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Old 03-21-2011, 04:10 PM   #11
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Mini started like that, then as the days got colder, i was smelling burnt oil and the oil light would flickr, i just removed the whole system, car runs great without it, and you never have to worry about a dirty intake manifold again
Nice...except now I have to worry about breathing in oil vapor! It's okay...I breathe in enough harmful stuff anyway I guess, but I hope this doesn't catch on here...a lot of cars will be failing inspections...though it seems states only care about exhaust and don't really inspect under hood.
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Old 03-21-2011, 04:17 PM   #12
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I have noticed this same phenomenon on my 01 330Ci...puff of smoke at start up...sometimes it does it while I'm driving also...would this still be the CCV or am I looking at something different since it happens more often that just start up. I'm brand new to the e46's so any help is much appreciated!
Miles on car? You might just not have been driving it enough. Oil can emulsify and I think that attenuates the CCV valve sticking, and that happens if you use crappy gas and drive short distances and keep the tank low. A long drive, higher rpms, is good in many ways.

I replaced mine before it blew...and at some point you will anyway, Elm, so study up a bit. You might get by on a long, warming drive now, but I suppose there's some risk that it might be at the wrong time...just saying. At some point also, you'll be so concerned about this that you'll do it anyway, and there's nothing wrong with that...as I said, you will have to eventually. It ain't waterboarding, though...just your car!

The good news is that if the puff caused a rough start and then disappears, it's probably not the head gasket...but check your fluid level and condition anyway...always good to do...particularly good when you suspect an issue.
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Old 03-21-2011, 05:23 PM   #13
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Thanks for the input everyone... I replaced my CCV last weekend, the puff of smoke hasn't happened since.

It was time consuming and tedious, but manageable for a DIY mechanic.
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