BMC Austin Morris J2

Coolant capacity & service interval

BMC Austin Morris J2 coolant capacity ranges from 6,25 to 6,82 liters. Service intervals require a change every 12 months. The data covers 4 configurations.

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

TypeSpecifications
J2 (1.5) (1965-1972)
  • Use: Normal
  • Capacity 6,25 liter
  • Change 12 months
J2 (1.6) (1965-1967)
  • Use: Normal
  • Capacity 6,25 liter
  • Change 12 months
J2 (1960-1965)
  • Use: Normal
  • Capacity 6,25 liter (+ heater)
  • Change 12 months
J2 Diesel (1960-1965)
  • Use: Normal
  • Capacity 6,82 liter (+ heater)
  • Change 12 months

Additional Notes

  • The BMC Austin Morris J2 cooling system capacity holds at 6.25 liters across the J2 (1.5) from 1965, the J2 (1.6) from 1965-1967, and the base J2 from 1960-1965, indicating a consistent system volume despite the span of engine variants covered.
  • The J2 Diesel from 1960-1965 carries a slightly larger cooling system capacity of 6.82 liters, reflecting the additional thermal load that diesel engines typically generate compared to petrol equivalents of similar displacement.
  • Both the base J2 and the J2 Diesel from 1960-1965 list their capacity with a "(+ heater)" notation, meaning the 6.25-liter and 6.82-liter figures represent the base cooling circuit alone, and the cabin heater circuit adds further volume on top of those stated values.
  • The 1965-1972 and 1965-1967 variants drop the "(+ heater)" notation from their capacity entries, so the 6.25-liter figure for those configurations is recorded without a separate heater circuit qualifier.
  • All four configurations share a 12-month change interval under normal use conditions, placing coolant renewal on an annual cycle regardless of engine type or displacement.

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