Fiat 1100, 103 (EU)

Coolant capacity & service interval

Fiat 1100, 103 (EU) coolant specifications cover capacities of 5, 5.3, and 5.6 liters. Six configurations are included in the data.

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

TypeSpecifications
1100H, 103S (1967-1969)
  • Use: Normal
  • Capacity 5,3 liter
1100R, 103P (1966-1969)
  • Use: Normal
  • Capacity 5,3 liter
1100D, 103G.1 (1962-1966)
  • Use: Normal
  • Capacity 5,3 liter
1100, 103D (1957-1962)
  • Use: Normal
  • Capacity 5,6 liter
1100, 103G/H (1957-1962)
  • Use: Normal
  • Capacity 5 liter
1100, 103E (1953-1957)
  • Use: Normal
  • Capacity 5,6 liter

Additional Notes

  • Across the Fiat 1100, 103 range, cooling system capacities fall within a narrow band of 5 to 5.6 liters, reflecting the small-displacement inline-four engines common to the entire model family throughout the 1953-1969 production span.
  • The 103E and 103D variants share an identical cooling system capacity of 5.6 liters, the highest figure recorded across all six configurations listed, despite the 103E predating the 103D in production years.
  • The 103G/H, produced between 1957-1962, carries the lowest capacity in the range at 5 liters, sitting 0.6 liters below the 103D of the same production period, indicating a difference in engine or cooling circuit design between the two concurrent variants.
  • The 1100D (103G.1), 1100H (103S), and 1100R (103P) all share a cooling system capacity of 5.3 liters, a mid-range figure that applies uniformly across the later production configurations spanning 1962-1969.
  • All six configurations carry a normal use condition designation for the cooling system, meaning the stated capacities apply to standard operating environments rather than severe-duty or special-service conditions.
  • The 5.3-liter figure appearing across the 103G.1, 103S, and 103P represents a slight increase over the 103G/H's 5 liters, consistent with minor engineering revisions that often accompany generational updates in a long-running model line.

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