Withdrawal
Disconnect the ground wire from the battery.
Drain the coolant from the engine.
Disconnect the upper and lower hoses from the radiator, after releasing and sliding back the fastening clamps,
M30/M21 engines: Disconnect the electrical wire from the temperature sensor in the right upper part of the radiator. Remove the right headlight cover first.
Release the two radiator mounting clips. To do this, insert a screwdriver as shown in the figure, press and tilt slightly forward.
In this case, the clamp is released from the front cross member.
Pull the radiator up.
Attention: Radiator fins have sharp edges, so it is recommended to wear work gloves when removing the radiator.
If necessary, unscrew the coolant level sensor (only 525i).
Additional details shown:
- 2 rubber support;
- 3 receiving part of the rubber support.
Installation
Check all water hoses for cuts, cracks or other damage and, if necessary, replace damaged hoses. Check the condition of the rubber lugs on the radiator.
Screw in the coolant level sensor with a new O-ring.
Insert the heatsink from above so that the rubber feet fit exactly into the receiving parts.
If removed, insert the mounting clips into the radiator, press the radiator against the front cross member and snap the clips into place.
Connect water hoses and secure with clamps.
If removed, connect the temperature switch wire. Install the right headlight cover.
Install fan.
Fill with coolant.
Connect ground wire to battery.
Warm up the engine and check the tightness of the hose connections.
Check and, if necessary, correct the coolant level.