Tumble Generator Valve explained by a certified Subaru tech Tumble Generator Valve Subaru
2012 Subaru WRX intake TGV leak The OEM tumble generator valves (TGV) found on the Subaru EJ engines create an air flow restriction when it comes to time for Your pressure washer unloader needs to be checked if you lose water pressure. If the stem has a ring then it is bypassing water ...