AMC Ambassador

Coolant capacity & service interval

AMC Ambassador coolant capacity ranges from 9,9 to 13,2 liters. Service intervals include checks at 6400, 8000, and 9600 km, and changes at 12 and 24 months. The data covers 7 configurations.

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

TypeSpecifications
Ambassador 258 Six (1971-1974)
  • Use: Normal
  • Capacity 9,9 liter
  • Check 8000 km/ 5 months
  • Change 12 months
Ambassador 304 V8 (1971-1974)
  • Use: Normal
  • Capacity 13,2 liter
  • Check 8000 km/ 5 months
  • Change 12 months
Ambassador 360 V8 (1971-1974)
  • Use: Normal
  • Capacity 12,3 liter
  • Check 9600 km
  • Change 12 months
Ambassador 401 V8 (1971-1974)
  • Use: Normal
  • Capacity 12,3 liter
  • Check 8000 km/ 5 months
  • Change 12 months
Ambassador 232 Six (1968-1970)
  • Use: Normal
  • Capacity 9,9 liter
  • Check 6400 km
  • Change 24 months
Ambassador 290 V8 (1968-1970)
  • Use: Normal
  • Capacity 13,2 liter
  • Check 6400 km
  • Change 24 months
Ambassador 343 V8 (1968-1970)
  • Use: Normal
  • Capacity 12,3 liter
  • Check 6400 km
  • Change 24 months

Additional Notes

  • The AMC Ambassador 232 Six and 258 Six share an identical cooling system capacity of 9.9 liters, despite being different engine displacements from different model year ranges. The six-cylinder configuration accounts for the notably smaller capacity compared to all V8 variants in the lineup.
  • The 290 V8 (1968-1970) and 304 V8 (1971-1974) both carry a 13.2-liter cooling system capacity, the largest figure across all Ambassador engine configurations. A 13.2-liter fill volume reflects the greater thermal load and larger block dimensions associated with these V8 engines.
  • The 343 V8, 360 V8, and 401 V8 all share a 12.3-liter cooling system capacity. Although these engines span different displacements and model years, the shared capacity suggests a common block architecture with similar coolant jacket volume.
  • A shift in coolant change intervals occurred between the 1968-1970 and 1971-1974 model years. The earlier 232 Six and 290 V8 specify a 24-month change interval under normal use, while all 1971-1974 engines specify a 12-month interval, indicating a more frequent replacement schedule for the later generation.
  • The check interval for the AMC Ambassador 232 Six (1968-1970) is set at 6,400 km under normal use conditions, while the 258 Six (1971-1974) specifies a check at 8,000 km or every 5 months, whichever comes first. The addition of a time-based threshold in the later specification introduces a dual-trigger check requirement absent from the earlier six-cylinder entry.
  • Among the 1971-1974 V8 engines, the 360 V8 stands apart with a check interval of 9,600 km, which is the longest distance-based check interval across all Ambassador cooling system specifications. The 304 V8 and 401 V8 from the same era specify 8,000 km or 5 months, making the 360 V8 the only 1971-1974 engine without a combined distance-and-time check trigger.
  • The 290 V8 (1968-1970) carries a 6,400 km check interval, matching the 232 Six from the same period. Both 1968-1970 entries rely solely on a distance-based check interval with no time-based component, a pattern consistent across all 1968-1970 Ambassador cooling system specifications.

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