Steyr S25

Coolant capacity & service interval

Steyr S25 coolant capacity is 40 liters. The service interval for coolant is 24 months. The data covers 2 configurations.

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

TypeSpecifications
19S25 (4x2) (1988-1993)
  • Use: Normal
  • Capacity 40 liter
  • Change 24 months
19S25 (4x4) (1988-1993)
  • Use: Normal
  • Capacity 40 liter
  • Change 24 months

Additional Notes

  • The Steyr S25 cooling system holds 40 liters across both the 19S25 4x2 and 4x2 configurations, a capacity consistent with heavy-duty commercial truck engines that require substantial coolant volume to manage thermal loads across large displacement powerplants.
  • The 40-liter figure represents a full cooling system fill, meaning the total volume circulating through the engine block, cylinder head passages, radiator, and associated hoses rather than a partial or top-up quantity.
  • A 24-month change interval applies to both the 4x2 and 4x4 drivetrain variants under normal use conditions, meaning the interval is tied to calendar time rather than distance or operating hours alone.
  • The shared 40-liter capacity between the 4x2 and 4x4 variants indicates the engine and cooling circuit architecture remains consistent regardless of drivetrain configuration, with the 4x4 transfer case and front axle components not adding to the coolant volume.
  • The 1988-1993 model range carries a uniform 24-month coolant change interval across all listed configurations, with no variation in service timing between the two drivetrain types.

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