ORing for Rear Turbo and Water Pipe
When you are replacing your turbos or even just the intercooler piping, you may run into sealing problems where the intercooler pipe connects to the rear turbo. The o-ring may be worn out.
If you are doing a 60k service (changing the water pump) you should really replace BOTH of the o-rings on the water pipe that connects the pump to the thermostat housing on the other side of the engine. The water pump kits come with one, but you'll need to buy another separately.
These are factory OEM parts.
Rear Turbo to Intercooler O-Ring (1 on car, priced each)Water Pipe O-Ring DOHC (2 on car, priced each)Water Pipe O-Ring SOHC (2 on 5spd, 1 on AT trans, priced each)