Keep your cooling system topped off and sealed under pressure with the Dorman coolant reservoir — the Dorman - OE Solutions Engine Coolant Reservoir (P/N 603-840). This pressurized plastic coolant tank holds engine coolant, accommodates thermal expansion, and drops in as a direct-fit replacement for many vehicles, among them the 2014-2021 Ram 2500 6.4L, 2014-2021 Ram 3500 6.4L and 2019-2021 Ram 4000 6.4L — see the Buyer's Guide tab for the full list.
Pressurized plastic tank: made from quality plastic with a 2.5 L capacity to hold coolant within the pressurized cooling system.
Twist cap included: ships with a twist-type cap rated to a maximum of 20 PSI.
Mounting brackets included: integrates two mounting holes and mounting brackets; mounting hardware is not included.
Durable construction: built from quality materials to stand up to underhood heat and engine vibration, engineered to equal the original part in fit and function.
No coolant level sensor is included. Package contents are one reservoir and one cap. Country of origin: Taiwan.
Is this the right coolant reservoir for a 2014-2021 Ram 2500 6.4L, including a 2018?
Yes—it's a direct-fit for the 2014-2021 RAM 2500 with the V8-6.4L engine. See the Buyer's Guide tab to confirm your vehicle.
Does the cap come with it?
Yes. It includes a twist-type cap rated to a maximum of 20 PSI. Package contents are one reservoir and one cap.
How much coolant does this reservoir hold?
The reservoir has a 2.5 L capacity. It's a pressurized plastic tank engineered to equal the original part in fit and function.
Is this a Dorman universal coolant reservoir?
No—it's an application-specific, direct-fit replacement for the listed RAM trucks, not a universal tank.
Does it include mounting hardware or a level sensor?
Mounting brackets are included, but mounting hardware is not—consult the vehicle service information for the correct fasteners. It does not include a coolant level sensor.
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit...
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit...
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit...
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit...
This replacement engine coolant reservoir is manufactured from quality materials to withstand the stresses of underhood heat and engine vibration. It is engineered and manufactured to match the fit...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
