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.
1984 Cadillac DeVilleCoolant Type & Capacity
OEM spec from the factory service manual for the 2D Coupe, 4.1 8, 200-4R/MW9 variant.
Quick Answer
Coolant Type
50/50 mixture of Ethylene Glycol Base Antifreeze and water
Capacity
11.00 QTS.
10.4 L
Variant
2D Coupe, 4.1 8, 200-4R/MW9
Note: GM Specification 1825-M.
Source: Factory service manual — 1984 Cadillac DeVille 2D Coupe, 4.1 8, 200-4R/MW9. View full manual section →
What You'll Need
Frequently Asked Questions
- What type of coolant does a 1984 Cadillac DeVille take?
- The 1984 Cadillac DeVille requires 50/50 mixture of Ethylene Glycol Base Antifreeze and water. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the 2D Coupe, 4.1 8, 200-4R/MW9 configuration.
- How much coolant does a 1984 Cadillac DeVille hold?
- The 1984 Cadillac DeVille cooling system capacity is 11.00 QTS. (10.4 L).
- Can I use universal coolant in my 1984 Cadillac DeVille?
- It is strongly recommended to use coolant that meets the 50/50 mixture of Ethylene Glycol Base Antifreeze and water 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 1984 Cadillac DeVille?
- 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.