Isuzu NKR

Coolant capacity & service interval

Isuzu NKR coolant capacity ranges from 8,6 to 14 liters. Service intervals require changes every 40000 km or 48 months. The data covers 5 configurations.

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

TypeSpecifications
NKR 35 (1998-2007)
  • Use: Normal
  • Capacity 8,6 liter
  • Change 40000 km/ 48 months
NKR 55 (1996-2007)
  • Use: Normal
  • Capacity 10 liter
  • Change 40000 km/ 48 months
NKR 58 (1996-2007)
  • Use: Normal
  • Capacity 14 liter
  • Change 40000 km/ 48 months
NKR 66 (1996-2007)
  • Use: Normal
  • Capacity 12 liter
  • Change 40000 km/ 48 months
NKR 69 (1996-2007)
  • Use: Normal
  • Capacity 8,6 liter
  • Change 40000 km/ 48 months

Additional Notes

  • Cooling system capacity across the Isuzu NKR range varies notably by variant, spanning from 8.6 liters on the NKR 35 and NKR 69 up to 14 liters on the NKR 58, reflecting differences in engine displacement and thermal load requirements between these configurations.
  • The NKR 58 carries the largest cooling system capacity in the range at 14 liters, a figure associated with higher-displacement engines that generate greater heat output and require a larger coolant volume to maintain stable operating temperatures.
  • The NKR 66 sits at 12 liters, placing the cooling system capacity between the mid-range NKR 55 at 10 liters and the NKR 58 at 14 liters, indicating a distinct engine configuration from both neighboring variants.
  • The NKR 35 and NKR 69 share an identical cooling system capacity of 8.6 liters under normal use conditions, despite being separate variants within the lineup.
  • All five variants share a uniform coolant change interval of 40,000 km or 48 months under normal use conditions, whichever comes first. The dual-trigger format means a vehicle with low annual mileage would reach the time-based threshold before the distance-based one.
  • The 48-month time interval equates to a four-year maximum service life for the coolant regardless of distance traveled, a common ceiling for conventional ethylene glycol-based coolants, which degrade chemically over time even without high mileage accumulation.
  • The NKR 35 carries a narrower model year window of 1998-2007 compared to the 1996-2007 span of the NKR 55, NKR 58, NKR 66, and NKR 69, indicating a later introduction for that particular variant within the generation.

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