Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Dodge Ram WagonCoolant Type & Capacity
OEM spec from the factory service manual for the B150, 3.9 X, Automatic variant.
Quick Answer
Coolant Type
PRESTONE II, PEAK, or antifreeze containing the ALUGARD 340-2 inhibitor system
Capacity
14.50 QTS.
13.72 L
Variant
B150, 3.9 X, Automatic
Note: Add 1 qt.with auxiliary rear heater.
This vehicle's factory manual
1990 Dodge Ram Wagon: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Other specs:All specs
What You'll Need
Related for Your 1990 Dodge Ram Wagon
Frequently Asked Questions
- What type of coolant does a 1990 Dodge Ram Wagon take?
- The 1990 Dodge Ram Wagon requires PRESTONE II, PEAK, or antifreeze containing the ALUGARD 340-2 inhibitor system. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the B150, 3.9 X, Automatic configuration.
- How much coolant does a 1990 Dodge Ram Wagon hold?
- The 1990 Dodge Ram Wagon cooling system capacity is 14.50 QTS. (13.72 L).
- Can I use universal coolant in my 1990 Dodge Ram Wagon?
- It is strongly recommended to use coolant that meets the PRESTONE II, PEAK, or antifreeze containing the ALUGARD 340-2 inhibitor system specification. Universal coolants may not provide the correct corrosion protection for your engine's materials.
- What happens if I use the wrong coolant in my 1990 Dodge Ram Wagon?
- Using coolant that does not meet the OEM specification can cause corrosion, gasket damage, and overheating. Always verify the correct coolant type before topping off or flushing the system.