Nipple on valve cover CCV diaphragm...

mike sevel · 11-11-2020, 08:30 PM

N52 E93 valve cover has integral CCV diaphragm. It has a nipple and mine is blocked with a plastic cap. I was watching a DIY video of a replacement of the CCV and a hose was connected to the nipple.

Please look at your nipples and advise me if it should be capped off or connected to a hose.

Thanx,
Mikey

JonOhh · 11-11-2020, 09:19 PM

Some are hosed to the ambient pressure clean side of the air intake system, some are simply capped with a plastic cap that allows the top of the ccv diaphragm to stay vented to ambient pressure. Cars came from the factory both ways, and both are completely acceptable.

In theory, having it exposed to clean (and even metered) air is better, but in practice I doubt it'll make any difference.

11-11-2020, 08:30 PM	#1
mike sevel Second Lieutenant 44 Rep 220 Posts Drives: '08 328i atlantic blue Join Date: Jul 2013 Location: NEW BRAUNFELS, TX iTrader: (0)	Nipple on valve cover CCV diaphragm... N52 E93 valve cover has integral CCV diaphragm. It has a nipple and mine is blocked with a plastic cap. I was watching a DIY video of a replacement of the CCV and a hose was connected to the nipple. Please look at your nipples and advise me if it should be capped off or connected to a hose. Thanx, Mikey
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11-11-2020, 09:19 PM	#2
JonOhh Captain 672 Rep 733 Posts Drives: 06' 330i Join Date: Dec 2019 Location: Tuscaloosa, Alabama iTrader: (0) Garage List 1999 BMW M3 [10.00] 2013 Fiat 500c Abarth [0.00] 1985 Fiat/Bertone X1/9 [0.00] 2006 BMW 330i [0.00]	Some are hosed to the ambient pressure clean side of the air intake system, some are simply capped with a plastic cap that allows the top of the ccv diaphragm to stay vented to ambient pressure. Cars came from the factory both ways, and both are completely acceptable. In theory, having it exposed to clean (and even metered) air is better, but in practice I doubt it'll make any difference.
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