Hürlimann H-400

Coolant capacity & service interval

Hürlimann H-400 coolant capacity ranges from 8,5 to 20 liters. Service intervals include 10 hours, 12 months, and 2400 hours or 24 months. The data covers 8 configurations.

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

TypeSpecifications
H-468, H-468 Prestige (1986-1995)
  • Use: Normal
  • Capacity 11 liter
  • Change 12 months
H-478, H-478 Prestige (1986-1995)
  • Use: Normal
  • Capacity 11 liter
  • Change 12 months
H-488 T (1986-1995)
  • Use: Normal
  • Capacity 13 liter
  • Capacity 15 liter (+ cabin)
  • Check 10 hours
  • Change 2400 hours/ 24 months
H-496 T (1985-1989)
  • Use: Normal
  • Capacity 20 liter
  • Check 10 hours
  • Change 2400 hours/ 24 months
H-466 (1982-1986)
  • Use: Normal
  • Capacity 8,5 liter
  • Change 12 months
H-470 (1982-1985)
  • Use: Normal
  • Capacity 10 liter
  • Change 12 months
H-480 (1982-1985)
  • Use: Normal
  • Capacity 10 liter
  • Check 10 hours
H-490 (1982-1985)
  • Use: Normal
  • Capacity 20 liter
  • Check 10 hours

Additional Notes

  • Across the Hürlimann H-400 series, cooling system capacities range from 8.5 liters on the H-466 up to 20 liters on the H-490 and H-496 T, reflecting significant differences in engine displacement and thermal load between the smaller and larger models in the lineup.
  • The H-488 T carries two listed capacity values: 13 liters for the base cooling system and 15 liters when a cabin heater circuit is included. The higher figure accounts for the additional coolant volume held within the cabin heating loop.
  • The H-466, H-468, H-468 Prestige, H-470, H-478, and H-478 Prestige all specify a coolant change interval of 12 months under normal use conditions, with no hour-based interval listed alongside.
  • The H-488 T and H-496 T share a dual-format change interval of 2,400 hours or 24 months, whichever comes first under normal use. This combined time-and-hour threshold is absent from the smaller-displacement variants in the series.
  • A 10-hour coolant level check interval appears on the H-480, H-488 T, H-490, and H-496 T. On the H-480, no change interval is listed alongside the check interval, whereas the H-488 T and H-496 T pair the 10-hour check with the 2,400-hour/24-month change schedule.
  • The H-468 Prestige and H-478 Prestige share their cooling system capacities and intervals with the standard H-468 and H-478 respectively, both specifying 11 liters and a 12-month change interval under normal use.
  • The H-490, produced from 1982-1985, holds the largest single-value cooling system capacity in the series at 20 liters, a figure matched only by the H-496 T from 1985-1989.
  • The transition from the early H-466 (8.5 liters, 1982-1986) to the H-468 and H-468 Prestige (11 liters, 1986-1995) represents a 2.5-liter increase in cooling system capacity between successive model variants sharing the same 12-month change interval.

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