Preparation/Finishing

Remove engine.
Remove intake air manifold.
Remove engine wiring harness with cable channels from engine.
Remove left exhaust manifold.
Suspend special tool 11 0 250 from front and rear lugs for raising engine and raise engine.





Unfasten guide tube for dipstick.
Remove bearing pedestal for A/C compressor.
Fit special tool 11 0 081.





Remove engine support on cylinder bank 5 to 8.





Installation:
Replace sealing rings, ensure that seals are correctly located and, if necessary, secure with grease.





Fit special tool 11 0 082.





Install engine in special tool 00 1 450,
Locate locking detent (1).
Close locking detent (2) on right and left and screw down.
Remove both cylinder head covers.
Remove all spark plugs.
Remove complete fuel line holder.
Remove throttle actuator.

Caution: The work step Removing and installing throttle actuator describes important instructions on installing the pull rods and throttles, refer to Powertrain Management.
Remove idling speed control valve. Remove molded hoses from supplementary air distributor to tank venting valve and throttles.
Remove knock sensor cable guide from return line (cylinder bank 5 to 8).
Disconnect vacuum hose for pressure regulator.
Disconnect vacuum hoses to electric valve.
Remove heating feed line from engine block and from both return lines on cylinder heads.





Remove coolant thermostat.
Installation:
Replace O-rings (1).





Remove oil lines (1) from cylinder head on cylinder banks 1 to 4 and 5 to 8.

Note: The oil lines (1) of cylinder banks 1 to 4 and 5 to 8 are different.

Note: Joint removal and installation of the cylinder heads on cylinder banks 1 to 4 and 5 to 8 requires a step-by-step procedure.

The work steps alternate between the cylinder heads on cylinder banks 1 to 4 and 5 to 8.