Intercooler

📖 YOUCANIC Automotive Glossary

The intercooler cools compressed air from a turbocharger or supercharger before it enters the intake. Compressing air generates heat (250-400F at turbo outlet) — hot air is less dense, reducing oxygen content. The intercooler restores density by cooling air toward ambient temperature. Air-to-air types use front-mounted cores; air-to-water types use a coolant loop with separate radiator and pump.

Problems include boost leaks from cracked end tanks (power loss, lean codes), internal oil contamination from turbo seal leakage, and physical damage on front-mounted units. On air-to-water systems, coolant pump failure causes heat soak and noticeable power loss during sustained hard driving.