6.7L External Coolant Leak Check

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.

Interview the owner of the truck to understand if coolant has been added. Note how much and how often coolant was added in the claim narrative. If coolant has been added, visually inspect the hot tank to see if the tank is being overfilled.

Inspect the engine for coolant leaking from hoses, drain cocks, water manifold, jumper tubes, expansion and pipe plugs, fittings, EGR cooler coolant supply and return tubes, EGR cooler vent lines, turbocharger coolant supply and return likes, EGR cooler, cup plugs, radiator core, lubricating oil cooler, water pump, transmission lines, DEF coolant lines going to the tank and DEF dosing valve, or any other components that have coolant flow. If necessary, pressure test the cooling system. Refer to 6.7L PRESSURE TESTER METHOD .

Repair any external coolant leaks before proceeding.

Pressure Cap:

A commonly overlooked item when troubleshooting the cooling system is the radiator pressure/expansion tank cap. The cooling system is designed to use a pressure cap to prevent boiling of the coolant. An incorrect, damaged, or malfunctioning cap can result in the loss of coolant. Inspect the cap to insure the pressure cap being uses is correct. Replace as necessary.

Pressure test the radiator cap. The pressure cap MUST seal within 14kPa (2psi) of the value stated on the cap, or it must be replaced.