BMW E90 320i N46B20 Cooling System Leakage

 

DIY Disclaimer: I hold no responsibility should anything goes wrong when you decided to follow my guide. It’s strictly meant as a reference for knowledge sharing purposes. 

Symptom:

1. Coolant warning pops up.

2. Wetness on the bottom engine cover directly below the intake manifold area.

3. On closer inspection, stick a torchlight behind the oil filter housing

You will see this..

The following is the culprit..

Source: http://bmwfans.info/parts-catalog/E90/Malaysia/320i-N46/R-N/apr2007/browse/engine/cooling_system_water_hoses/#7560130_4

Parts required:

Item 4: Connector: 11 53 7 560 130, comes with profile gasket

I also bought the hose (Item 1 below) because coolant stains appear at the connector area.

Hose f engine inlet and addit.water pump: 64 21 6 928 590

http://bmwfans.info/parts-catalog/E90/Malaysia/320i-N46/R-N/apr2007/browse/heater_and_air_conditioning/additional_water_pump_water_hose_valve

Only 2 size 10mm bolts holding to the Connector, very easy job.

After the connector is removed:

New versus old

The culprit.. just the gasket..but for peace of mind replace the entire connector.

Lastly, top up coolant accordingly.

OK folks! That’s all the photos I have to share.

Good luck and thanks for dropping by..