Unimog (MB) 427
Coolant capacity & service interval
Unimog (MB) 427 uses coolant with a capacity of 18 liters. The service interval for coolant change is 36 months. The data covers 4 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| U 1600, U 1650, U 1650 L (427) (1992-2001) |
|
| U 1000, (427) (1988-2001) |
|
| U 1200, U 1250, U 1250 L (427) (1988-2001) |
|
| U 1400, U 1450 (427) (1988-2001) |
|
Additional Notes
- Across all variants of the Unimog (MB) 427 covered in the specifications, the cooling system capacity is uniformly rated at 18 liters, a figure consistent with the demands of heavy-duty commercial vehicle engines in this class.
- The U 1000 carries an 18-liter cooling system capacity with a 36-month change interval under normal use conditions, a pairing that reflects a time-based rather than mileage-based service approach common in utility and off-road vehicle applications.
- The U 1200, U 1250, and U 1250 L share identical cooling system specifications with the U 1000, each rated at 18 liters with a 36-month normal-use change interval across the 1988-2001 model years.
- The U 1400 and U 1450 also carry the same 18-liter capacity and 36-month change interval under normal use, maintaining consistency with the lighter variants in the 427 series for the same 1988-2001 period.
- The U 1600, U 1650, and U 1650 L share the 18-liter capacity and 36-month normal-use interval, though the specifications for these variants begin in 1992 rather than 1988, distinguishing the introduction year from the rest of the 427 lineup.
- A 36-month coolant change interval under normal use conditions means the service schedule is governed by elapsed time, which is a standard approach for vehicles that may accumulate operating hours unevenly or operate in variable duty cycles.