Below is the description for the M51 engine. The valve is installed under the inlet pipeline, in the center.
1. In the de-energized state, the piston extends under spring pressure and blocks the fuel supply.
1 - Inlet hole
2 - Distributor piston
3 - Distributor head
4 - Retracting magnet
5 - High pressure chamber
2. Remove the dust cap. Give the nut located under a cap and remove the pipeline from the valve of a cut-off of fuel.
3. Unscrew the shut-off valve with a 24 mm wrench.
The piston and spring may fall out.
4. Installation is carried out in the reverse order. Check the correct installation and integrity of the sealing ring, if necessary, replace it.