Jeep Wrangler / CJ-7 / CJ-8, YJ (USA / CAN)

Coolant capacity & service interval

Jeep Wrangler / CJ-7 / CJ-8, YJ (USA / CAN) coolant capacity ranges from 8,5 to 11,4 liters. The data covers 5 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
Wrangler 2.5 (USA) (1994-1997)
  • Use: Normal
  • Capacity 9,5 liter
Wrangler 4.0 (USA) (1994-1997)
  • Use: Normal
  • Capacity 11,4 liter
Wrangler 2.5 (USA) (1987-1993)
  • Use: Normal
  • Capacity 8,5 liter
Wrangler 4.2 (USA) (1987-1993)
  • Use: Normal
  • Capacity 9,9 liter
CJ-7 / CJ-8 (USA) (1985-1987)
  • Use: Normal
  • Capacity 8,5 liter

Additional Notes

  • The Jeep CJ-7 / CJ-8 (USA) from 1985-1987 and the Wrangler 2.5 (USA) from 1987-1993 share an identical cooling system capacity of 8.5 liters, despite representing a model transition across those years.
  • The Wrangler 2.5 (USA) saw a capacity increase from 8.5 liters in 1987-1993 to 9.5 liters in 1994-1997, a difference of 1.0 liter tied to the same four-cylinder engine across two distinct production periods.
  • The Wrangler 4.2 (USA) from 1987-1993 carries a cooling system capacity of 9.9 liters, placing it between the 2.5-liter four-cylinder and the later 4.0-liter six-cylinder in terms of coolant volume.
  • The Wrangler 4.0 (USA) from 1994-1997 has the largest cooling system capacity in the group at 11.4 liters, reflecting the greater thermal load associated with the inline six-cylinder engine relative to the four-cylinder configurations.
  • All five configurations carry a normal use condition designation, meaning the listed capacities apply to standard operating environments rather than severe-duty or first-change-only service scenarios.
  • Across the 1994-1997 Wrangler lineup, the 4.0-liter engine requires 1.9 liters more coolant than the 2.5-liter engine, a variation that would affect the volume of antifreeze concentrate needed to achieve a given freeze protection ratio.

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