Jeep Wrangler / CJ-7 / CJ-8, YJ (EU)

Coolant capacity & service interval

Jeep Wrangler / CJ-7 / CJ-8, YJ (EU) coolant capacity ranges from 8,5 to 11,4 liters. Service intervals include 36000 km/24 months, 60000 km, and 120000 km/60 months. 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 (1994-1997)
  • Use: Normal
  • Capacity 9,5 liter
  • Change 120000 km/ 60 months
Wrangler 4.0 (1994-1997)
  • Use: Normal
  • Capacity 11,4 liter
  • Change 120000 km/ 60 months
Wrangler 2.5 (1987-1993)
  • Use: Normal
  • Capacity 8,5 liter
  • Change 36000 km/ 24 months
Wrangler 4.2 (1987-1993)
  • Use: Normal
  • Capacity 9,9 liter
  • Change 36000 km/ 24 months
CJ-7 / CJ-8 (1985-1987)
  • Use: Normal
  • Capacity 8,5 liter
  • Change 60000 km

Additional Notes

  • The Jeep CJ-7 / CJ-8 cooling system holds 8.5 liters, which is a total system capacity figure used when fully draining and refilling the coolant circuit, such as during a flush or major service.
  • The CJ-7 / CJ-8 (1985-1987) carries a change interval of 60,000 km under normal use conditions, with no time-based limit specified alongside the distance figure.
  • The Wrangler 2.5 produced from 1987-1993 shares the same 8.5-liter cooling system capacity as the earlier CJ-7 / CJ-8, though the change interval drops significantly to 36,000 km or 24 months under normal use.
  • The Wrangler 4.2 (1987-1993) holds 9.9 liters of coolant, placing the six-cylinder capacity above the four-cylinder 2.5 of the same production period, which holds 8.5 liters.
  • Both the 1987-1993 Wrangler 2.5 and 4.2 share the same 36,000 km / 24-month change interval under normal use, despite the difference in cooling system volume between the two engines.
  • From 1994 onward, the Wrangler 2.5 cooling system capacity increased to 9.5 liters, up from 8.5 liters in the 1987-1993 version of the same engine, reflecting a change in system volume between the two generations.
  • The Wrangler 4.0 (1994-1997) has the largest cooling system capacity in the lineup at 11.4 liters, consistent with the greater thermal load produced by a larger displacement inline-six engine.
  • Both the Wrangler 2.5 and 4.0 produced from 1994-1997 carry an extended change interval of 120,000 km or 60 months under normal use, a substantial increase over the 36,000 km / 24-month interval applied to the 1987-1993 Wrangler models.

Other Systems