TM 5-2420-230-24-2
Air Intake System - General Information
Section 10 - Air Intake System - Group 10
Page 10-4
B Series Shop Manual
Air Intake System - General Information
The air intake system for the B Series turbocharged and aftercooled engines, Models 4BTA3.9 and 6BTA5.9,
consists of the aftercooler and connections, air crossover hardware, turbocharger, and associated hardware.
The turbocharged engines, Models 4BT3.9 and 6BT5.9 use a manifold cover in place of the aftercooler.
The air intake system for the naturally aspirated engines, Models 4B3.9 and 6B5.9 consists of the manifold cover
mounted to the intake manifold in the cylinder head.
The air intake system for the B Series automotive engines, Models B3.9 and B5.9, consists of the turbocharger,
the charge air cooler, turbocharger-to-charge air cooler hardware, charge air cooler-to-intake manifold cover
hardware, intake manifold cover, and associated hardware. On the higher horsepower ratings of the B5.9 engine,
the turbocharger is equipped with a wastegate which limits the amount of boost pressure.
The turbocharger is cooled and lubricated with engine oil from the engine lubricating system.
The instructions for rebuilding the turbocharger are printed in Turbocharger Shop Manual Bulletin No. 3810321.
Caution: If the engine experiences a turbocharger failure or any other occasion where oil or debris can enter
the charge air cooler (CAC), the CAC must be cleaned (refer to Procedure 10-06).
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