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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 04-21-2017, 10:56 AM
johhnyfaire johhnyfaire is offline
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Location: Los Angeles, CA
Join Date: Apr 2017
Posts: 21
Mein Auto: '03 330i (GM Auto)
Originally Posted by 2.5i_z4 View Post
Hello all! Might be a dumb question but I own a 2003 bmw z4. I was wondering if this mod would work for me. I still have the same m54b25 engine, I just don't have power steering like you guys.

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Ccv deletes are basically changing out the "badly" engineered pcv system on all BMWs with a regular pcv valve, which you can place somewhere easy to get for future maintenance and parts are way cheaper, and having a perfectly sealed catch can to catch the oil that would otherwise drain bad into the intake manifold and causing trouble. Some cars have a drain back system, where you could purchase or modify any catch can to have this hose fixed to the bottom, then attaching it to the dip stick drain back tube...

Problem is the pcv, you need one that is calibrated to open at certain pressure. We are all taking the word of someone else here, because they say it works for them, then a few years later they sell the car, we can learn little from the longevity of this particular person's opinion.

Not all BMWs have the same manifold pressure and vacuum designs. So each car would have a different pcv. This is where you need to do research... Some. People just put a breather on the F-connector they install on the oil catch can. Here, not having a calibrated pcv is less of problem, but not perfect.

If you have an oil consumption problem, significant oil loss between changes, then this catch can w/breather filter system would help any car. Then you can buy a little time until you find the right PCV

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