Subaru Turbocharger Explained Part 2:
When working under the hood on a model equipped with a turbocharger, don’t be tempted to lay tools or parts on the intercooler. It might look like a handy surface, but you could easily damage the delicate fins and affect the cooling ability of the intercooler. Take extra precautions not to drop anything on it.
A constant supply of clean oil to lubricate the turbine shaft and carry away heat is of utmost importance to turbocharger longevity. Dirty oil cannot conduct heat as well as clean oil and can leave sediment on the turbine shaft, which will cause damage to the rotating shaft and the seal. Always emphasize the need for oil changes at the required intervals outlined in the owner’s manual to avoid turbo and engine damage.
Excessive exhaust backpressures can quickly cause damage to a turbine seal. A clogged catalytic converter can create such pressures, as can a change in exhaust system plumbing. Aftermarket exhaust components may not match the backpressures of the original system and therefore create problems. Always stick with Subaru exhaust components for the best results.They are designed for proper operation with Subaru turbocharger systems.
Poor incoming air flow can adversely affect turbocharger function. Be sure to check the air filter and PVC components for clogging. Aftermarket parts may not allow the proper air flow needed for turbocharger operation. Again, stick with Subaru parts that are designed for the vehicle.