[ IMPORTANT DIAPHRAGM REPAIR AND LIQUID GASKET WARNING ]
Catastrophe of Diaphragm Replacement: When the crankcase ventilation (PCV) diaphragm tears in N47 engines, breaking that part of the cover with a screwdriver in the industry and putting a makeshift rubber diaphragm inside, then sealing it with Japanese glue is the biggest sabotage you can do to the engine. That cover will never hold vacuum again; the engine will draw air from outside, idle will be disrupted, and it can pump liters of oil into the intake manifold, causing the engine to run uncontrolled (with its own oil) and potentially explode. The only solution is to completely replace it with a brand new BMW E90 N47 Valve Cover.
Liquid Gasket Error: Applying red or black liquid silicone under this cover, which should be installed with its original gasket, can cause the broken silicone pieces to clog the oil filter, leading to engine bearing failure.
The most vital upper body component of the legendary 2.0 diesel (N47) engines in BMW's 3 Series E90 chassis (especially in LCI models); the symbol of German quality, the imported BMW E90 N47 Valve Cover is now available! This system protects the camshafts and also regulates the high crankcase pressure within the engine, which is a chronic weak point of N47 engines. Over time, an old BMW E90 N47 Valve Cover that has been warped due to excessive heat or has a torn crankcase ventilation (PCV) diaphragm can lead to your vehicle suddenly consuming excessive oil, emitting thick white/blue smoke from the exhaust, and completely filling the turbo's airways with oil. Often mistaken for "turbo failure," this dangerous situation can be resolved by replacing this cover, which is the main source of the problem, with this brand new BMW E90 N47 Valve Cover made from a special high-temperature resistant polymer, manufactured to OEM standards. This FEBI brand BMW E90 N47 Valve Cover, which comes in a plug-and-play form with its original lower rubber gasket and integrated PCV valve, cleans your E90's engine compartment of oil leaks and prevents DPF (Diesel Particulate Filter) blockages.
German FEBI Bilstein Quality Produced with the assurance of FEBI, a world giant in the automotive aftermarket, it has the same elasticity and heat resistance values as the original cover.
Integrated Perfect PCV Diaphragm The new PCV system, ultrasonically welded to the cover, perfectly filters crankcase gases; it effectively prevents oil from being pumped into the intake manifold and turbo.
Gasketed Plug-and-Play Installation Set The product comes with a pressure-resistant outer rubber gasket factory-fitted into its channel. It is ready to be screwed in directly without the need for liquid silicone.
Technical Details
| Brand |
FEBI Bilstein (A-Quality Imported Engine Component) |
| Product / Reference Code |
174674 (On the lower gasket) |
| Product Type |
BMW E90 N47 Valve Cover (Camshaft/Valve Cover) |
| Compatibility |
BMW 3 Series E90 Chassis (Only for "N47" Code 2.0 Diesel Engines.) |
Frequently Asked Questions (FAQ)
My car consumes 1 liter of oil every 1000 kilometers and emits white smoke from the exhaust. The mechanic said it's the turbo. If I buy this cover instead of the turbo, will it fix the issue? This is the most common diagnostic error made in N47 engines. When the PCV diaphragm inside the valve cover tears, the engine draws oil from the crankcase as a liquid instead of vapor into the intake manifold and the turbo's airways. This oil burns in the cylinders, producing white smoke and causing significant oil consumption. Even if your turbo is perfectly fine, the turbo pipes will remain filled with oil. Before spending tens of thousands on a turbo overhaul, replacing this cover, which is the main source of the problem, usually resolves the issue completely.
Do I need to change the injector seals (O-rings) along with the cover? Yes, the fuel injectors must be removed when the valve cover is taken off. If the old injector seals (copper rings) that are crushed and have lost their shape are reinstalled during the cover replacement, it will cause compression leakage. Always use brand new injector seals of original dimensions when changing the cover.
