Reliant Regal
Coolant capacity & service interval
Reliant Regal coolant capacity ranges from 3,42 to 3,99 liters. Service intervals require a change every 24000 km. The data covers 2 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| Regal 3/30 (1967-1972) |
|
| Regal 3/25 (1962-1968) |
|
Additional Notes
- The Reliant Regal cooling system capacity varies depending on whether a heater is fitted. With a heater, the system holds 3.99 liters, while without a heater, the figure drops to 3.42 liters, a difference of 0.57 liters.
- The 0.57-liter difference between the heater and non-heater configurations reflects the additional coolant volume held within the heater core and its associated hose circuit when a cabin heating unit is installed.
- Both the Regal 3/25 (1962-1968) and the Regal 3/30 (1967-1972) share identical cooling system capacities across both heater configurations, at 3.99 liters with a heater and 3.42 liters without.
- The shared 24,000 km coolant change interval applies to both the Regal 3/25 and the Regal 3/30 under normal use conditions, meaning neither variant calls for a more frequent or extended service schedule relative to the other.
- A 24,000 km coolant change interval is a relatively short cycle by later automotive standards, which is consistent with the maintenance expectations common to vehicles of the 1960s and early 1970s era.