Riley 1.5
Coolant capacity & service interval
The Riley 1.5 uses coolant with a capacity ranging from 7 to 7.38 liters depending on the configuration. The data covers 3 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 1.5, Mk III (1961-1965) |
|
| 1.5, Mk II (1960-1961) |
|
| 1.5, Mk I (1957-1960) |
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Additional Notes
- The Riley 1.5 Mk I, produced from 1957-1960, carries a fixed cooling system capacity of 7.38 liters, indicating a single defined fill volume with no variation across that generation.
- The Mk II, covering 1960-1961, lists a capacity range of 7 to 7.38 liters for the cooling system, which reflects a tolerance band rather than a single absolute figure, suggesting minor variation in fill volume was acceptable within that specification.
- By the Mk III generation spanning 1961-1965, the cooling system capacity settles at a fixed 7 liters, representing a slight reduction from the upper bound seen in the Mk I and the range given for the Mk II.
- All three generations share a normal use condition designation for their cooling system specifications, meaning the listed capacities apply to standard operating environments rather than severe or modified service conditions.
- Across the full 1957-1965 production span, the cooling system capacity narrows from a high of 7.38 liters in the Mk I down to exactly 7 liters in the Mk III, with the Mk II serving as a transitional specification bridging both values.