BMW 11127591617 Valve Gear Cylinder Head

You can Select Your Vehicle to check if 11127591617 fits your vehicle.

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.

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.

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.

6-cylinder engine has the cylinder head equipped with double VANOS and a unique technique of utilizing special equipment and methods needed for the removal of the VANOS unit in the cylinder head process. A person should read the whole procedure before starting the repair as the disassembly and removal of the head as well as the assembly of the camshafts needs special tools and may sometimes cause breakages. Valves may be bent by contact to the piston crown and camshafts can be easily broken if they are to be stressed during removal or installation. VANOS is an acronym for VAriable NOckenwellen Steuerung in German and its service is discussed in relation to the camshaft timing chain. The procedure of the cylinder head removal and installation is described separately with the explanation that the intake manifold has to be unbolted before the cylinder head. If there will be much work which will be necessary after pulling a cylinder head, one can purchase a recycled cylinder head from the BMW dealer.

Use new cylinder head bolts with pre-coated threads.

Disconnect various cooling hoses.

At the front of the cylinder head, remove the timing chain module mounting bolts and unclip the chain module. Do not remove the crankshaft locking tool to avoid jamming the timing chain.

In the M54 cylinder head, intake air enters the combustion chamber from one side, while exhaust gases exit from the other side.

Complete the reverse of the removal process, including refilling the cooling system and engine oil while installing a new oil filter.

If the cylinder head is machined, use a special thicker gasket available from an authorized BMW dealer.

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.

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

Raise the car and support it safely, then drain the engine coolant by removing the expansion tank cap, placing a pail underneath to capture coolant, and removing the coolant drain plug on the exhaust side of cylinder 2.

Yes, camshaft timing is addressed in a separate section.