Removal and installation the radiator (BMW 3 Series E36)

If the car has a high mileage, the radiator may be clogged with particles contained in the coolant and lime deposits. Because of this, the cooling efficiency decreases and the engine quickly overheats. In this case, only replacing the radiator helps.

Removal

Remove the fan.

Drain the coolant from the engine.



Disconnect the upper and lower hoses from the radiator, having first released and moved back the mounting clamps.



Model 3251: Disconnect the level sensor wire "13" at the lower left side of the radiator.

If there is an air conditioner, disconnect the temperature switch connector "1" on the right side of the radiator.





Only on cars with automatic transmission: Disconnect the hoses from the gearbox oil cooler, collect the leaking oil. Close the wires with clean plugs, no dirt should get into the hoses.



Press the two radiator mounting clamps. To do this, insert a screwdriver as shown in the picture, press and tilt slightly forward. This will release the plastic clamp from the front cross member.

Pull the radiator upward.

Caution: The radiator fins have sharp edges, so it is recommended to wear work gloves when removing the radiator.

Installation

Check all water hoses for cuts, cracks and other damage and, if necessary, replace damaged hoses. Check the condition of the rubber radiator mounting tips.

Screw in the coolant level sensor with a new O-ring.





Insert the radiator from above so that the rubber supports fit precisely into the receiving parts.

If removed, insert the mounting clamps into the radiator, press the radiator against the front crossmember and snap the clamps into place.

Screw the automatic transmission oil hoses to the radiator with new seals, tightening torque 20 Nm.

Connect the water hoses and secure them with clamps.

If removed, connect the temperature switch and level sensor wire.

Install the fan.

Fill with coolant and bleed air from the cooling system.

Only on vehicles with automatic transmission: Check and, if necessary, adjust the oil level in the gearbox:

Warm up the engine and check for leaks at the hose connections.

Check and, if necessary, adjust the coolant level.