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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 02-03-2015, 08:21 PM   #1
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Join Date: Feb 2007
Location: Ft.Lauderdale
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My Ride: BMW E46 325CI
Gotta dig back into the CVV/CCV Oil Separator this weekend

So long story short. I replaced my CVV this past weekend and had my brother help out here and there. For this hose he was the one who connected it and we never got that clicking 'confirmation'. So i am taking some time out on friday to get to it again(7-8hrs for me).

My question is; Does anybody who has done this project have a technique they used that you can tell me about. There really is no space to push that hose into the top of the CVV

i am also getting a humming like sound when i shut the car off after a drive. That i confirmed that it has to be the new CVV with that hose sitting on there unhooked. I removed the oil cap while with the engine running and the cars idle started dropping and fluctuating up and down so... Any help?
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Last edited by Manny04; 02-03-2015 at 08:22 PM.
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Old 02-03-2015, 11:19 PM   #2
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You have to twist the end of the hose onto the CCV diaphragm. When you have it apart, look at the groove on the end of the hose. The groove fits onto the diaphragm tightly.
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Old 02-04-2015, 01:47 AM   #3
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As tcphoto said, that hose doesn’t click, it twists. Here’s the section in the BavAuto video DIY that shows how that piece connects and the best way to do it: https://www.youtube.com/watch?featur...wxoFAl7I#t=637

DIYs help you save money with repairs; let www.bmwpnpc.com help you save money with the parts.
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Old 02-04-2015, 05:08 PM   #4
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Photos on the link below to show you what to do.

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Old 02-05-2015, 12:41 AM   #5
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Doesnt click huh? good to know. My mistake was not attaching them before installing, to study its mechanism.

Thanks guys! back to taking it all apart this weekend.smdh
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Old 02-05-2015, 09:27 AM   #6
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The hardest thing is trying to get part #3 (hose) to connect with part #1 (ccv body). It's not a snap connection. The two parts need to rotate 90 degrees relative to each other. Here's how I solved that problem.

- with the parts out of the car mark on the parts the point where the parts can be joined but not rotated. Use a permanent marker.
- tie a 2' string to the upper part of the hose. It should go below the small male tube.
- route the hose through the manifold.
- place the ccv body into position. Check the parts' relative position. Remove the hose.
- warm the bottom part of the hose with hot tap water. Gently bend the bottom of the hose so that it and the ccv body will be aligned when in position. This may take several tries, but persistence pays off!!!!!
- route the hose, and then push the top part down between the intake runners (hence the need for the string). Wrap the string around the oil fill cap!
- position a long screwdriver between the runner and the hose so that the screwdriver can push the hose towards the body.
- position the ccv body, and then rotate the bottom of the ccv body towards the engine.
- using the marked lines from the first step, align the parts and the use the screwdriver to force the parts together.
- rotate the ccv body back into position. The parts are now joined
- use the string to move the hose into position.
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