Withdrawal
1. Remove the appropriate exhaust manifold (see Section Removal and installation of exhaust manifolds).
2. Empty the engine cooling system (see chapter Vehicle settings and routine maintenance).
3. Remove both cylinder head covers (see Section M60/1 and M60/2 petrol engines).
4. Remove the spark plugs (see chapter Vehicle settings and routine maintenance).
5. When removing the right cylinder head, remove the engine cooling fan clutch (see Section Removal and installation of the fan drive clutch Chapters Engine cooling, heating, ventilation and air conditioning systems).
6. Remove the engine cooling manifold (see Section Removal and installation of a collector of system of cooling Chapters Engine cooling, heating, ventilation and air conditioning systems).
7. Remove oil supply channels from both cylinder heads.
8. Turn the crankshaft by the central bolt clockwise so that the piston of the first cylinder is at TDC of the end of the exhaust stroke. Then give half a turn three available bolts for fastening the camshaft sprockets of the opposite cylinder head.
Fixture of asterisks of camshafts of the right head of cylinders (piston of the 1st cylinder at TDC of the exhaust stroke)
9. Turn the crankshaft so that the piston of the first cylinder is at TDC of the end of the compression stroke.
10. Holding the camshaft with a wrench by the hexagon, loosen the remaining bolts securing the camshaft sprockets of the opposite cylinder head by about half a turn.
11. Remove the chain tensioner plunger and remove the corresponding upper timing cover (see Section Removing and installing timing chain covers).
12. On the respective cylinder head, remove the intake camshaft sprocket. Secure the chain so that it does not slip.
13. Turn the crankshaft counterclockwise to the position of 45°TDC according to the alignment marks.
On motors without a 45°mark, turn the shaft until tool #11 3 440 is in the selection on the CKP sensor rotor.
14. When removing left head of the cylinders, unscrew the countersunk screw and, if equipped, the bolt (1) corner coupling fixings (2).
15. Remove the bolt (s) fastening the guide chain, and when removing left cylinder heads optional PCV oil separator bolts. When removing the left cylinder head, remove the oil separator from the angle coupling.
Bolts of fastening of a directing chain on the right head of cylinders
16. Turn out bolts of fastening of a head of cylinders in reverse sequences.
17. Remove the cylinder head, clean the surfaces mating with the cylinder block from the remnants of the gasket and sealant. Be careful not to damage the mating surfaces and keep dirt and oil out of the threaded holes. If necessary, clean the threaded holes.
Installation
1. Apply Hylomar SQ 32 M to the joint between the cylinder block and the timing cover.
2. Make sure the integrity and correct installation of the centering sleeves and lay on the cylinder block new gasket.
3. Establish a head of the block of cylinders and tighten bolts of its fastening with the demanded effort and sequence.
When installing the left cylinder head, the oil separator must be pressed outward. Follow the correct connection of the oil outlet tube to the oil separator.
4. Installation left head of the cylinders, install the oil separator in the angle bracket, after checking the condition of the sealing ring and, if necessary, replacing it.
5. Tighten the timing chain guide bolts.
6. Installation left cylinder heads, tighten the oil separator fastener and countersunk screw.
The screw at this stage should be tightened until it touches the angle socket.
7. Use a wrench to center the camshafts.
8. Install on camshafts right cylinder heads of fixture No. 11 2 445/441, and on the shafts of the left head - fixtures No. 11 2 446/442.
Special tools on the right cylinder head
Special tools on the left cylinder head
9. In the position of the piston of the first cylinder at TDC of the end of the compression stroke, the mounting holes of camshafts 1 and 2, as well as 3 and 4 (right bank of cylinders) are at the top.
Tags on the shafts of the right cylinder head
Labels on the shafts of the left cylinder head
10. Fix the camshafts with a wrench so that the tools fit against the cylinder head without any play.
11. Install tool No. 11 2 443 on both cylinder heads and secure it with bolt No. 11 2 444.
12. Turn the crankshaft clockwise from 45°to TDC to TDC and lock the crankshaft in this position using special tool No. 11 2 300 or a suitable rod.
13. Install the sprocket with the chain on the intake camshaft of the cylinder head to be installed so that the arrow on the cylinder axis points upwards and the mounting bolts are in the middle of the longitudinal grooves. Screw in the bolts by hand.
Installation of an asterisk of an inlet camshaft of the left head of cylinders
Installation of an asterisk of an inlet camshaft of the right head of cylinders
14. Installation right cylinder heads, install tool No. 11 2 400 on it.
15. Insert into the right timing cover (when installing the left cylinder head) or on fixture No. 11 2 400 (when installing the right cylinder head) tool No. 11 3 390 and, turning the set screw on it using special tool No. 00 9 250, tighten the tensioner bar with a force of 1.3 Nm.
16. Torque tighten: all left exhaust camshaft bolts, 3 right exhaust shaft bolts, all left intake shaft bolts, and finally 3 right intake shaft bolts.
17. Remove the tools No. 11 2 444/443/441/445/442/446, as well as the device for fixing the crankshaft.
18. Turn the crankshaft one turn and tighten the 3 remaining bolts of the right camshaft sprockets.
19. Install the oil supply channels.
20. Remove the tensioner strap tightening tools.
21. Establish other removed components in an order, the return to an order of their dismantle.