Removing and Installing Right Cylinder Head (N62 from 9/03 and N62TU)
11 12 106 - Removing and installing right cylinder head (N62 from 9/03 and N62TU)
(cylinder bank 1 to 4)
Note:
To remove the exhaust manifolds, the engine must be secured in the installation position with the special tool and then the front axle bracket lowered.
Remove right exhaust manifold Removing and Installing / Replacing Right Exhaust Manifold.
After removing exhaust manifolds:
Reinstall front axle bracket provisionally and remove special tool for securing engine in installation position.
Open drain plug for coolant on right side of engine block.
Drain off coolant and dispose of correctly.
Installation Note:
Replace sealing ring.
Tightening torque of drain plug 11 11 5AZ 11 11 Engine Block.
Top up coolant. Vent cooling system and check for leaks.
Remove ignition coils on cylinder bank 1 to 4.
Remove servomotor for right eccentric shaft.
Remove intake air manifold Removing and Installing/Sealing Right Cylinder Head Cover.
Remove right cylinder head cover Service and Repair.
Remove right timing case cover Removing and Installing Top Right Timing Case Cover (N62 / N62TU).
Disconnect plug connections and lay engine wiring harness to one side.
Remove spark plugs on cylinder bank 1 to 4.
Remove vent hose on cylinder head.
Note:
Illustration with engine removed.
Detach hose (1) on check valve (4).
Unfasten screws (2).
Important!
A spacer bushing is secured with screw (3) behind tube (5).
Release screw (3) and remove check valve (4), tube (5) and spacer bushing.
Unclip cables (6 and 7).
Installation:
Replace sealing ring on tube (5) and coat with antiseize agent.
Removal:
Removal of cylinder head is described separately from installation.
Remove inlet and exhaust adjustment unit on right side Removing and Installing/Replacing Inlet and Exhaust Adjustment Units on Right Side (N62/N62TU).
Slacken off chain tensioning piston (1) by approx. one turn.
Note:
Illustration with engine removed.
Remove eccentric shaft sensor (2).
Detach guide rail from cylinder head.
Release screws between cylinder head and timing case cover.
Note:
At narrow points, use a socket with 3/8" drive and a short extension.
Release cylinder-head bolts in sequence 10 ... 1.
Lift off cylinder head.
Lift off cylinder head gasket.
Remove chain tensioning piston (1).
Place chain tensioning piston (1) on a level surface and compress slowly and carefully.
Repeat this procedure twice.
Installation:
Installation of cylinder head is described separately from removal.
Clean sealing faces of cylinder head and crankcase; if necessary, remove gasket debris with wooden scraper. Make sure no gasket debris drops into the oil and coolant ducts.
Threaded bores in engine block must be free of dirt and oil (risk of cracking).
Replace sealing ring.
Install chain tensioning piston (1) and initially tighten screw connection without play.
Coat joint between engine block and timing case cover with Drei Bond 1209 (refer to BMW Parts Service).
Check dowel sleeves (1) for damage and correct installation position.
Fit new cylinder-head seal.
Put the cylinder head on.
Note:
Do not wash off bolt coating. Insert new cylinder head bolts and initially tighten so that they are free of play.
At narrow points, use a socket with 3/8" drive and a short extension.
Tighten down the cylinder-head bolts in order 1 ... 10.
Tightening torque 11 12 8AZ 11 12 Cylinder Head with Cover.
Insert and tighten down screws between cylinder head and timing case cover.
Replacement:
Insert screw plug (1).
Installation:
Failure to install the screw (1) will result in a malfunction in the VANOS control.
Insert and tighten down guide rail screw.
Note:
Illustration with engine removed.
Install eccentric shaft sensor (2).
Tighten down chain tensioning piston (1).
Tightening torque 11 31 8AZ 11 31 Camshaft.
Install inlet and exhaust adjustment units on right side Removing and Installing/Replacing Inlet and Exhaust Adjustment Units on Right Side (N62/N62TU).
Assemble engine.