Air Intake System - General Information Section 10 - Air Intake System M11 Page 10-4 Air Intake System - General Information The Air Intake System Group consists of the intake manifold, charge air cooler and turbocharger. The charge air cooler uses ram air with the aid of the cooling fan to cool the intake air between the turbocharger and the intake manifold during engine operation. Refer to the OEM for information on the maintenance procedures for the charge air cooler. The turbocharger is cooled and lubricated with engine oil from the engine lubricating oil system. The M11 engine uses capscrews in both metric and U.S. Customary dimensions.
In some cases, the capscrews are almost identical in dimensions and appearance. Be sure to install capscrews in the same location as they were removed from. The pipe plugs and hose clamps installed in the intake system are U.S. Customary dimensions.