🔍 Key Concepts

• Follow the airflow path through the turbocharger: from air filter, into the compressor, then out to the aftercooler, then to the engine intake manifold. • Identify which side is the compressor (air side) and which is the turbine (exhaust gas side). The aftercooler only connects on the air side outlet. • Look for the scroll/volute that carries compressed air away from the compressor impeller toward the engine, not the passage bringing air in.

💭 Think About

• On the illustration, which labeled passage is clearly carrying air away from the compressor wheel toward an external pipe connection? • Which labels are on the exhaust gas side (hot side) and therefore cannot be connected to an air aftercooler? Eliminate those first. • Does the shape of the casing around that label look like an outlet scroll (discharge) or an inlet to the impeller? That will tell you if it feeds or leaves the compressor.

✅ Before You Answer

• Be sure you have correctly identified the compressor wheel and housing versus the turbine wheel and housing. • Confirm that the point you choose is on the compressed air discharge side, not on the intake or exhaust gas side. • Verify that the labeled area you pick is where an external duct or pipe could be bolted on to carry air to the aftercooler.