Charge air radiator (Audi A4 B5)

Fresh air sucked in through the air filter is accelerated in the compressor and compacted. Not only the seal itself, but also the one located in the exhaust gas flow (and therefore hot) turbochargers provide subsequent heating of the intake air. At full load, the intake air temperature can rise to 110°C.

The charge air cooler is connected between the turbocharger and the engine intake manifold. It can cool the intake air after the compression process by about 50°C before it enters the engine. This improves the filling of the combustion chambers and therefore increases the power.

Removal the charge air radiator

1. Remove the front shock absorbers.

2. Remove both air hoses on the charge air radiator.

3. Loosen the nuts on the mounting clamp.

4. Unscrew the mounting bracket or hang it up.

5. Remove the charge air radiator, if necessary, unscrew the air duct.

Information obtained from this resource audimanual