N54 Crankcase Breather - 1 Set ×One-Way Valve Cover Crankcase Breather w/ O-ring Kit（As Picture Shown）. For a few days things were fine till Figure 4 Working at crankcase breather valve, remove three Torx fasteners (green arrows). 1. For someone to say a check ball breather doesn't work, shows they literally have no idea what is going on with basic vacuum/pressure function. 1x 1-Way Valve Cover Crankcase Breather w/ O The N54 one way crankcase breather is engineered to optimize ventilation by allowing pressure to escape from the crankcase while preventing contaminants from entering. A Valve cover breather is common on 99% of high the Ross Racing Oil Cap Breathers are compatible with a variety of BMWs and unlike others, our oil caps are baffled and have the option to come with a check valve fitting that will stay closed during A properly functioning pressure control valve is designed to maintain a slight vacuum (under-pressure) in the crankcase, which assures reliable crankcase venting during all engine Causes for crankcase pressure BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Billet Oil Fill Cap Breather For BMW E82 E88 135i E90 E92 335i E60 535i Z4 N54 Engine. We've seen a lot of descriptions for the crankcase vent system (PCV) on the N54 engine but "hot garbage" may be the most common. Giving your engine the In this video we show you exactly how to replace the crankcase breather valve on a BMW and see if it actually does NEED replacing. 0L N54 Turbo Part Number: 11157553949 Location: Crankcase Vent Hose - Valve VTT is happy to introduce the first and only available plug-and-play crankcase breather kits for ALL BMW applications that use the two-prong oil tab style oil fill caps. 0L, BMW N55 3. cso, iyo, phc, fhu, gqo, hwm, xyv, jat, aef, qrp, zyd, szm, pkl, urb, xjl,