Transmission Oil Pump Cover TY856 6MT Rear Part of the pressure equalization

Part of the pressure equalization system used promote oil drainback on AVCS-equipped EJ applications

300M is an aerospace alloy with increased strength

The knock sensor bolts to the top of the engine block and generates a voltage signal based on a noise frequency that corresponds to engine knock

It is common for this pipe to rust out causing a pinhole leak or for rust underneath the hose connections to prevent proper sealing

Transmission Oil Pump Cover TY856 6MT Rear Part of the pressure equalizationThe cast iron oil pump cover is used on oil pump equipped transmission applications (MY01 early MY07). It is secured with a series of torx bolts and serves to resist the rear thrust loads of the drive and driven shafts. Drilled passages direct oil from the oil pump into the ends of the gear shafts for bearing lubrication. Manufacturer Part No: 31328AA081 What it fits: STI MY01 07 (USDM early MY07 only) Forester STI MY04 07 Legacy Spec B MY06 07