Contents: Removal ↡ Installation ↡
The pressure reducing valve is located at the front in the main oil line and opens at an excess pressure of 5 bar (engine type 110). In accordance with the location of the units in the engine compartment, various units must be removed.
Removal
Remove the radiator.
Remove the fan clutch.
Remove the alternator belt and unscrew the crankshaft pulley.
Remove the plug bolt for the pressure reducing valve.
Unscrew the plug bolt (see arrow) for the oil channel with an 8 mm Allen key and remove it. To do this, lubricate the key so that the bolt remains hanging on it.
Remove the sealing ring from the countersink of the oil channel using a lever. In this case, the sealing ring cannot fall until a long wire is inserted into the oil channel.
Installation
Screw in the pressure reducing valve and tighten to a torque of 40 Nm.
Coat the thread of the plug bolt with sealant and tighten the bolt to a torque of 50 Nm. Tighten the pulley bolt to a torque of 35 Nm.
Install the cooling fan clutch, put on the belt and tighten it.
Install the radiator.
Fill with coolant.
Start the engine, check the oil pressure and the tightness of the plug bolt.
Material borrowed from an online resource: www.mercedesman.ru