Yanmar EF

Coolant capacity & service interval

Yanmar EF models utilize coolant with a capacity range of 4,1 to 4,75 liters. Service intervals include a check at 10 hours and a change every 12 months. The data covers 4 configurations.

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

Type	Specifications
EF-312T, Yanmar 3TNV84 (2012-2020)	Use: Normal Capacity 4,1 liter Check 10 hours Change 12 months
EF-352T, Yanmar 3TNV88 (2012-2020)	Use: Normal Capacity 4,1 liter Check 10 hours Change 12 months
EF-393T, Yanmar 3TNV88 (2012-2020)	Use: Normal Capacity 4,75 liter Check 10 hours Change 12 months
EF-494T, Yanmar 4TNV88 (2012-2020)	Use: Normal Capacity 4,45 liter Check 10 hours Change 12 months

Additional Notes

The Yanmar EF-312T and EF-352T share an identical cooling system capacity of 4.1 liters, despite being powered by different engines — the 3TNV84 and 3TNV88 respectively.
The EF-393T carries the largest cooling system capacity across all four configurations at 4.75 liters, which is notably higher than the other 3TNV88-powered variant, the EF-352T, at 4.1 liters.
The EF-494T, fitted with the four-cylinder 3TNV88, holds 4.45 liters of coolant — a figure that falls between the EF-352T and EF-393T despite the added cylinder count.
A 10-hour check interval applies uniformly across all four configurations, reflecting the demands of equipment operating in agricultural or industrial conditions where coolant level and concentration can shift quickly.
All four configurations follow a time-based coolant change interval of 12 months under normal use conditions, meaning calendar time rather than operating hours governs the replacement schedule.
The capacity difference between the EF-352T and EF-393T — both using the 3TNV88 engine — suggests the two models have different cooling circuit volumes, likely due to variations in radiator size or system routing rather than the engine block itself.