Corteco Valve Stem Seal Set for BMW N57 / B57 3.0 Diesel Engines - Corteco 11347812926

Complete 24-Piece Valve Stem Seal Set for BMW N57 / B57 Diesel Engines A full engine set of genuine Corteco valve stem seals for BMW's 6-cylinder 3.0 litre N57 and B57 diesel engines. Corteco is the automotive aftermarket brand of Freudenberg, one of the original equipment suppliers of sealing technology to BMW, so you're fitting the same quality as factory. Why replace your valve stem seals? Valve stem seals control the tiny amount of oil that lubricates the valve guide. As the FPM rubber hardens and loses elasticity with age and heat cycling, oil begins to seep past the seal and down into the combustion chamber. Common symptoms of worn stem seals include: Blue-grey smoke on startup, or after the engine has been idling Gradually increasing oil consumption with no visible external leak Oil fouling of the glow plugs Accelerated carbon build-up on the valves and in the intake Because replacement requires removal of the camshafts, stem seals are almost always done as part of a wider cylinder head job — a head refresh, a timing chain replacement, or a performance camshaft and valve spring upgrade. Doing them at the same time saves a second teardown later. Specifications Part Number 19036772 Manufacturer Corteco (Freudenberg Group) Trade Number VSS KIT Quantity in Set 24 seals — complete engine set Material FPM (fluoride rubber) — high heat and oil resistance Height 15.8mm Inner Diameter 5mm Outer Diameter 9.5mm Flange Diameter 21.5mm Number of Valves 24 Replaces OE Part Number BMW 11347812926 Also Cross-References Elring, Victor Reinz EAN 3358960575418 Country of Origin Italy Weight 0.162kg What's Included 24 x Corteco valve stem seals (complete set for one engine) Vehicle Fitment Suits BMW 2993cc 6-cylinder diesel engines (N57 and B57 families). Confirm against your engine code before ordering. 3 Series: 325d, 330d, 330xd, 330d xDrive, 335d xDrive — E90, E91, E92, E93, F30, F31, F34, F80 4 Series: 430d, 430d xDrive, 435d xDrive — F32, F33, F36, F82, F83 5 Series: 525d, 530d, 530d xDrive, 535d, 535d xDrive, 540d xDrive, M550d xDrive — F07, F10, F11, G30, G31, F90 6 Series: 630d, 630d xDrive, 640d, 640d xDrive — F06, F12, F13, G32 7 Series: 730d, 730Ld, 730d xDrive, 740d, 740d xDrive, 750d xDrive — F01, F02, G11, G12 X3: xDrive 30d, xDrive 35d, xDrive M40d — F25, G01 X4: xDrive 30d, xDrive 35d, xDrive M40d — F26, G02 X5: xDrive 25d, xDrive 30d, xDrive 40d, M50d — E70, F15, F85 X6: xDrive 30d, xDrive 40d, M50d — E71, E72, F16, F86 Important Notes Installation requires camshaft removal and a valve spring compressor. Professional installation is recommended. Always replace all 24 seals as a set — mixing new and aged seals leads to uneven oil control. Ideal to fit alongside a performance valve spring or camshaft upgrade, since the valvetrain is already stripped. Please confirm your engine code before ordering. Contact us if you need help checking fitment.