Left cover
1. Remove the left cylinder head cover (see Section M60/1 and M60/2 petrol engines).
2. Remove the impeller fan drive coupling (see chapter Engine cooling, heating, ventilation and air conditioning systems). If necessary, disconnect the additional air supply pipes.
3. Disconnect the EVAP valve from the left upper timing chain cover.
4. Remove from the timing cover and take aside the positive wire from the battery.
5. Remove the mounting bolts and remove the timing chain cover.
6. Installation is carried out in the reverse order. Pay attention to the position of the centering sleeves, use new gaskets. When attaching the timing chain cover, finger-tight the horizontal bolts first, then tighten to the required torque and in two steps vertically, before finally tightening.
Right cover
1. Remove the right cylinder head cover (see Section M60/1 and M60/2 petrol engines).
2. Remove the chain tensioner plunger and, if necessary, the additional air supply pipes.
3. Remove the CKP sensor and unscrew the top bolt of the engine oil dipstick guide (see illustration).
4. Remove the mounting bolts and remove the timing chain cover.
5. Installation is carried out in the reverse order. Pay attention to the position of the centering sleeves, use new gaskets and sealing rings. When attaching the timing chain cover, finger-tight the horizontal bolts first, then tighten to the required torque and in two steps vertically, before finally tightening.
Bottom cover
1. Remove the engine (see Section Removal and installation of the engine).
2. Remove both cylinder heads (see Section Removal and installation of the cylinder head, timing adjustment).
3. Remove the water pump along with the thermostat housing (see chapter Engine cooling, heating, ventilation and air conditioning systems).
4. Remove the upper section of the engine oil pan (see Section Removal and installation of the upper section of the oil pan).
5. Remove the vibration damper hub.
6. Remove the bolts and remove the timing chain cover.
7. Clean the sealing surfaces of the cylinder block from dirt and oil.
8. Installation is carried out in the reverse order. Pay attention to the position of the centering sleeves, use new gaskets. When attaching the timing chain cover, first tighten the bolts by hand, and then with the required force in a checkerboard pattern. Finally, cut off the protruding ends of the metal gaskets and replace the front crankshaft oil seal (see Section Replacing the crankshaft seals).