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Old 09-13-2019, 07:21 AM   #14
Registered User
Join Date: Dec 2018
Location: VA USA
Posts: 1,028
My Ride: AWD
Model: 330XI 08/2004
Transmission: auto
Originally Posted by markusmarkus View Post
The “cold climate” version is BS. The manufacturer merely wraps the CCV body with 2 pieces of foam insulation. All that does is make it longer for the CCV body to get up to temperature. Plus it’s a real PITA to install it.

To prevent the CCV from clogging up drive the car at highway+ speeds for at least 20 miles on a weekly basis. Btw, the engineer who designed the CCV had been fired by Audi before coming to BMW.
yeah i have the cold climate version on the 04 but i don't think it makes a difference. the only real solutions are the O2pilot mod or to replace the CCV with an oil catch can?

Originally Posted by wfx32 View Post

nice document with lots of good info on the M54. my favorite so far is p4 "NEW PISTONS ... the piston rings have been modified to reduce friction" (!)
or go after the source of the problem .. the excessive "blowby" from these modified rings? i'm thinking about tackling this but it requires a mix of rings from M54 and M52tu.
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