Oil in coolant resevour

Asked by GuruRZSQN Feb 02, 2020 at 03:26 PM about the 2007 BMW 3 Series 328i Sedan RWD

Question type: Maintenance & Repair

Can water get in the
automatic transmission or
engine from a bad oil filter
base gasket or a bad engine
oil cooler gasket

5 Answers

41,110

Yes, coolant can migrate to the transmission or engine via the cooler lines.

1 people found this helpful.

Can water get in both engine & transmission through a bad engine oil cooler gasket or a bad oil filter housing gasket?

41,110

A leaking OFHG has nothing to do with the coolant and can't migrate.

7,845

Is it oil or transmission fluid? Oil and coolant can in fact mix through a leaking oil filter housing gasket on the N52 engines. Coolant runs through that gasket as well.

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