Note: For catalog numbers of the guard and the bolts that secure it, see here.
Note: The original bolts are M6 in size and, due to their often unreasonably high cost, are successfully replaced by regular, similar bolts of the same size.
Recommendation: crankcase protection bolts have a tendency to "sorry" a lot, which leads to problems with unscrewing them, and frequent stripping of their heads and threads (especially common when working with a wrench at a service station). Lubricate the bolts each time they are loosened with a suitable lubricant. To prevent spontaneous loosening, you can use Grover washers.
Removal
Disconnect the battery terminal and place the car on a lift or in a pit.
Raise the car (in case of using a lift)
Unscrew the six bolts securing the 2 crankcase guard, Figure 17-1, remove the 1 engine crankcase guard (you will need a 10 mm spanner).
Figure 17-1 - Removing the engine crankcase guard: 1 - engine crankcase protection; 2 - engine crankcase protection mounting bolt
Installation
It is better to install the protection with an assistant so that he can support the protection while inserting the bolts.
The tightening torque of the crankcase protection mounting bolts is 10 Nm (1.0 kgf·m).