Coolant leaking from the intake manifold area of your 2023 Ram 1500 indicates gasket failure where coolant passages pass through or around the intake. These leaks can be external or internal, with different symptoms and implications.
Coolant Routing Through Intake
Many engines route coolant through the intake manifold for throttle body heating or heater supply connections. The intake manifold gaskets must seal both air passages and coolant passages. Gasket failure can leak coolant externally or internally.
External Leak Symptoms
External leaks appear as coolant on the outside of the intake manifold or running down the engine. The leak may be visible at the manifold-to-head junction or around coolant fitting connections on the manifold.
Internal Leak Symptoms
Internal leaks allow coolant into the intake air stream. Coolant can be drawn into cylinders causing misfires, white smoke, or hydrolock. Internal leaks show coolant loss without external evidence.
Gasket Materials and Failure
Intake gaskets use various materials depending on the seal requirements at different locations. Composite gaskets can deteriorate, metal gaskets can warp, and O-ring seals can harden and crack.
Repair Considerations
Intake manifold removal is required for gasket replacement. While disassembled, inspect all related gaskets and seals. On higher-mileage vehicles, replacing all intake gaskets during service prevents repeat disassembly.
Code P0128 Connection
Code P0128 indicates the engine doesn't reach proper operating temperature. Coolant loss from intake leaks can affect thermostat function and set this code.