why is oil mixing with coolant in coolant tank

Asked by jimtighe Feb 18, 2014 at 05:05 PM about the 2006 BMW 3 Series 320d

Question type: Maintenance & Repair

2006 bmw 320 msport

10 Answers

1,650

Thanks for accepting me. I have a problem my bmw 2006 e90 is mixing woter and oil in the woter bottle help me guyz plz

165 people found this helpful.
330

My 2003 X5 has oil in coolant,but not water in oil . I started to pull the cylinder head,but remembered that wife said the transmission was acting funny. I drained the transmission fluid it was almost gone and mixed with water. Check this first before you pull half the motor apart like me. The only place it can get in is the cooler.

33 people found this helpful.
310

My e90 had the same prob....oil in the coolent... I replaced the oil cooler and fluched the hole sytem..i olso replaced the oil valve separator...runs great now ...but i check every week

31 people found this helpful.
80

Hi guys Its truly helpful,I've experiencing the same also, my moves well but there's transmission in a coolant water bottle ,so I want to flush water bottle ,oil in engine, gear box transmission also

8 people found this helpful.
120

I had sam problem with my 320i m sports. I had two reasons for this problem 1) engine cooler 2) transmission cooler I changed them and flushed all of my fluid and coolant. Now it runs excellent

11 people found this helpful.
120

Because of gear cooler leakage or engine cooler. Depends on what kind of oil is in your coolant tank

1 people found this helpful.

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