Hey I have a 2013 STi and recently had the motor rebuilt. On the passenger side the AVCS solenoid (which the factory manual refers to as the Exhaust oil flow control solenoid) has an O ring that I believe is causing a small oil seep. I have replaced the gasket underneath the component but it still leaks. The parts department does not show an o ring available for it separately you have to buy the whole solenoid assembly. Was wondering if anyone in the forum knows a part number or the dimensions of this o-ring so that I can get it ahead of time before I disassemble it? I have attached a picture of the whole assembly. The item on the top is the solenoid I am asking about the o-ring dimensions on. Thank you!