Morris 1100, ADO16

Coolant capacity & service interval

Morris 1100 and ADO16 models require coolant with a capacity range of 3,27 to 3,83 liters. Service intervals consist of checks every 5000 km or 3 months. The data covers 2 configurations.

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

TypeSpecifications
1100 Mk II (1967-1971)
  • Use: Normal
  • Capacity 3,83 liter (+ heater)
  • Capacity 3,27 liter (Without heater)
  • Check 5000 km/ 3 months
1100 MK I (1962-1967)
  • Use: Normal
  • Capacity 3,57 liter (+ heater)

Additional Notes

  • The Morris 1100 ADO16 Mk I, covering 1962-1967, carries a coolant capacity of 3.57 liters, with the notation that a heater adds to that base figure.
  • The Mk II variant, spanning 1967-1971, shows a higher base capacity of 3.83 liters when a heater is fitted, reflecting a modest increase over the Mk I specification.
  • When the Mk II is equipped without a heater, the coolant capacity drops to 3.27 liters, a difference of 0.56 liters compared to the heater-equipped configuration of the same generation.
  • The Mk I specification lists no coolant check interval, whereas the Mk II specification includes a normal-use check interval of every 5,000 km or 3 months, whichever comes first.
  • The presence of two distinct Mk II capacity figures tied to heater fitment indicates that the heater circuit is integrated into the main cooling loop rather than being a separate closed system.