BMW 11127591617 Valve Gear Cylinder Head

Begin by emptying the cooling system and engine oil to detach the cylinder head, follow with removal of intake plenum,exhaust module and catalytic converter. On other hand unfasten various hoses for cooling then eliminate both intake and exhaust VANOS adjustment units as well take out injectors accompanied with injector shaft tube fasteners. Set servo motor correctly and eccentric shaft apart, unscrew timing chain module-to-cylinder head bolts and remove timing chain module-to-crankcase bolts through plug openings. Unscrew a specified number of cylinder head bolts then lift off the cylinder head with care to avoid damaging the sealing face. Remove cylinder head gasket; close oil pump galley openings in block. For proper assessment of this component before using it again take it to an experienced workshop specializing in machining autos after testing and resurfacing is done. Clean mating faces; inspect for damages; clean bolt holes, threads. Meanwhile, while installing ensure cleanliness of surfaces, correct dowel positioning as well as right direction of its gasket hole . Apply new cylinders' heads bolts that have pre-coated threads tighten them according to stages which are torque settings specified angles. Mount additional screws, set up the eccentric shaft stop screw into place as well as time chain module, VANOS adjustment units then reassemble everything dismantled putting back all parts except filling cooling system anew together with engine oil adding a fresh oil filter during installation process.

Start by draining the cooling system and taking out the intake and exhaust manifolds to replace the cylinder head. Disengage the cooling hoses, let clamps go loose, and note their positions prior to removal. Be careful not to rotate the crankshaft as you take off VANOS adjustment units and unclip the timing chain module. Then remove eccentric shaft position sensor with its magnetic sensor wheel, turn eccentric shaft so that lobes are facing upward and remove M6 stop-screw between 1st and 2nd cylinders. Proceed to release cylinder head bolts watching out for the locations of M9&M10 bolts and their lengths. Ask someone for help in lifting the cylinder head while threading through it a timing chain therewithout setting up on its face having seal so as not to cause damage on valves. Remove cylinder head gasket and close oil pump galley openings. Inspect mating surfaces for nicks, scratches or warpage; clean bolt holes along with threads before checking surface finishes for nicks or burrs; this process will involve cleaning bolt holes including threads too among other things. Clean mating faces, position dowels correctly during installation while ensuring flywheel/drive plate is locked at TDC with new gasket placed for subsequently lowering on top of cylinder head where applicable pre-coat new cylinder head bolts should be inserted also with washers therefore hand tightening must be done so torque & angle specifications could follow leading onto securing bolts inclusive of installing M7 and M9 aluminum bolts at timing chain end. To reinstall timing chain followed by VANOS adjustment units plus other parts in opposite order then refill coolant system buttons up this procedure.

Begin by emptying the cooling system and engine oil to detach the cylinder head, follow with removal of intake plenum,exhaust module and catalytic converter. On other hand unfasten various hoses for cooling then eliminate both intake and exhaust VANOS adjustment units as well take out injectors accompanied with injector shaft tube fasteners. Set servo motor correctly and eccentric shaft apart, unscrew timing chain module-to-cylinder head bolts and remove timing chain module-to-crankcase bolts through plug openings. Unscrew a specified number of cylinder head bolts then lift off the cylinder head with care to avoid damaging the sealing face. Remove cylinder head gasket; close oil pump galley openings in block. For proper assessment of this component before using it again take it to an experienced workshop specializing in machining autos after testing and resurfacing is done. Clean mating faces; inspect for damages; clean bolt holes, threads. Meanwhile, while installing ensure cleanliness of surfaces, correct dowel positioning as well as right direction of its gasket hole . Apply new cylinders' heads bolts that have pre-coated threads tighten them according to stages which are torque settings specified angles. Mount additional screws, set up the eccentric shaft stop screw into place as well as time chain module, VANOS adjustment units then reassemble everything dismantled putting back all parts except filling cooling system anew together with engine oil adding a fresh oil filter during installation process.

The double VANOS is a variable camshaft timing system that helps optimize engine performance.

It can lead to damage or breakage, with the risk of valves bending due to contact with piston crowns.

The N52 engine has a power output of 85 hp per liter displacement.

Remove the intake and exhaust camshaft adjustment units by loosening their mounting bolts and discarding them.

Attach the coolant pipe with a new O-ring, and connect the oil line to the VANOS unit with a banjo bolt and new seals.