Riley 4
Coolant capacity & service interval
The Riley 4 coolant specifications cover a fluid capacity of 7.09 liters including the heater. The coolant should be changed every 8000 km. The data covers 2 configurations of the Riley 4 model.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 4/72 (1961-1969) |
|
| 4/68 (1959-1961) |
|
Additional Notes
- The Riley 4/68 cooling system holds 7.09 liters, with the notation that a heater adds to the total volume when fitted, meaning the 7.09-liter figure represents the base system without a heater circuit.
- The 4/72 variant shares the same 7.09-liter base cooling capacity as the 4/68, indicating no change in cooling system volume between the two engine configurations despite the model update in 1961.
- A coolant change interval of 8,000 km is specified for the 4/68 under normal use conditions, applying to the 1959-1961 production years.
- No coolant change interval appears in the 4/72 specifications, whereas the 4/68 carries an explicit 8,000 km service interval, marking a difference in the service data recorded between the two variants.