Manifold, Intake: Cleaning
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of CHRYSLER GROUP, LLC
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Clean the intake manifold (2) in solvent and blow dry with compressed air.
Clean the gasket sealing surface area of the air intake heater (5) using a suitable solvent.
The plenum pan rail must be clean and dry (free of all foreign material).