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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > What physically is modified for the CDV?



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      12-02-2007, 09:21 PM   #1
M3to335
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What physically is modified for the CDV?

I realize what a modified CDV is doing, but what are the vendors physically doing to "modify it". If its something I can do in the machine shop, id like to do that instead of buying another one.

I heard its just poking out the valve
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      12-19-2007, 07:23 PM   #2
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i just modded mine. What a cheesy easy thing to do.....

On the 2006 330I version (plastic), there is a small metal orrifice that needs to be removed. If you look closely you can see there is a small plastic plug that is glued in to hold the little metal restrictor in. I drilled out the plastic plug with a drill bit that fit closes the fit in the hole until i got the the metal restrictor. Then i flipped it over to the other side and took a flat tipped punch and whacked it out with a couple of light pops with a small hammer. It popped out clean. i made sure clean inside, then reinstalled it.
Note: of course on the 330I there was enough extra in the hose i didnt need to replace the modified CDV, but i did so the dealer cant give me crap if something does go wrong....


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      12-20-2007, 03:12 AM   #3
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i looked on the http://zeckhausen.com/bmw_products.htm site and for some reason i cant do this mod on a RHD car
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      12-20-2007, 06:59 AM   #4
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Itdorn... so people are buyin the Zeckhousen ones, when all they have to do is essentially POKE something out.
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      12-20-2007, 09:35 AM   #5
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Quote:
Originally Posted by M3to335 View Post
Itdorn... so people are buyin the Zeckhousen ones, when all they have to do is essentially POKE something out.
Machined out, but yes.
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      12-20-2007, 12:42 PM   #6
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Im just going to machine my own then. Thanks.
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      12-20-2007, 06:18 PM   #7
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Quote:
Originally Posted by M3to335 View Post
Im just going to machine my own then. Thanks.
Machining is an exaggeration of what needs to be done. Take an awl, put it through the hole, poke lightly with hammer, piece pops out.

If anyone wants it done, send me yours and Ill do it for you.
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