Contents: Removal ↡ Installation ↡
Heat exchanger (oil cooler) connected to the oil and coolant circulation circuit by direct and recirculation pipelines. The pipelines are connected to the oil pump from the side through the oil pan.
The operations performed on a 2.2/2.5L diesel engine are described below.
Removal
1. Disconnect the negative (–) cable from the battery.
Attention! This will erase the radio's anti-theft code.
2. Unscrew the lower engine compartment cover and remove it.
3. Drain the engine oil.
4. Drain the coolant.
5. Unscrew the bolt (2) and remove the hoses (1) connecting the heat exchanger to the coolant pump. Note the installation position of the pipe holder (arrow).
6. Disconnect the heat exchanger from the oil pan, unscrew the bolts (8). The Allen bolt (9) for the oil line is installed only with an automatic transmission.
(Material created based on the website: «mercedesman.ru»)
7. Remove the coolant hoses (1) with O-rings (2).
8. Remove the oil lines (7) with O-rings (6).
Installation
1. Installation is performed in the reverse order of removal. Always replace the O-rings with new ones. Before installation, lubricate the rings for the coolant hoses with coolant, not engine oil, to prevent them from sticking.
2. Tighten the bolts securing the heat exchanger to the oil pan to a torque of 10 Nm.
3. Install the lower engine compartment cover.
4. Fill with engine oil.
5. Fill with coolant.
6. Connect the battery ground (–) cable.
7. Set the clock.
8. Set the radio anti-theft code.