The Kubota GL368 coolant capacity is listed as 1.73 gal (6.5 L). It also lists coolant type ethylene glycol-based coolant, long-life coolant, and ASTM D3306 compatible and antifreeze mix Kubota recommends a 50: 50 ethylene glycol-based coolant-to-water mix for the GL368 tractor to protect against freezing and overheating.
Kubota GL368 Coolant Capacity
| Coolant capacity | 1.64 gal (6.2 L) |
|---|---|
| Cooling system capacity | 1.73 gal (6.5 L) |
| Radiator capacity | 1.65 gal (6.2 L) |
| Coolant type | ethylene glycol-based coolant, long-life coolant, and ASTM D3306 compatible |
| Antifreeze mix | Kubota recommends a 50: 50 ethylene glycol-based coolant-to-water mix for the GL368 tractor to protect against freezing and overheating |
| Coolant change interval | every 2 years and every 2,000 hours |
| Engine model | V1903 |
| Engine horsepower | 36.8 hp (27.4 kW) |
Coolant Capacity Comparison Chart
Coolant capacity comparison
Engine horsepower comparison
Kubota GL368 Coolant and Engine Notes
| Coolant capacity note | The headline cooling-system number for the Kubota GL368 is 1.73 gal (6.5 L). Buy enough coolant before opening the drain plug |
|---|---|
| Radiator capacity note | For the Kubota GL368, the captured radiator capacity is 1.65 gal (6.2 L). If you are doing a full drain, check the full cooling-system capacity too |
| Coolant type note | The captured coolant type for the Kubota GL368 is ethylene glycol-based coolant, long-life coolant, and ASTM D3306 compatible. Do not mix unknown coolant types unless the label and manual say they are compatible |
| Antifreeze mix note | For the Kubota GL368, the captured mix is Kubota recommends a 50: 50 ethylene glycol-based coolant-to-water mix for the GL368 tractor to protect against freezing and overheating. Straight water is not the right long-term answer unless you are only flushing the system |
| Coolant change interval note | Coolant service for the Kubota GL368 is listed as every 2 years and every 2,000 hours. If the service history is unknown, a fresh drain and refill is usually the cleaner move |
| Engine context note | Engine context for the Kubota GL368: engine model V1903 and engine horsepower 36.8 hp (27.4 kW). Engine size helps explain why coolant capacity changes between models |
| Refill note | For a coolant change on the Kubota GL368, do not just dump in coolant and walk away. Fill slowly, run it up to temperature, cool it down and top up as needed |
Kubota GL368 Coolant Capacity FAQ
What is the cooling system capacity of the Kubota GL368?
The Kubota GL368 cooling system capacity is shown as 1.73 gal (6.5 L). That is the number to use before draining the system.
What coolant type should I use in the Kubota GL368?
Use ethylene glycol-based coolant, long-life coolant, and ASTM D3306 compatible. The blunt rule is simple: match the manual’s coolant spec and do not mix unknown coolant formulas.
Should I use straight water in the Kubota GL368?
Not for normal long-term use. The Kubota GL368 should use Kubota recommends a 50: 50 ethylene glycol-based coolant-to-water mix for the GL368 tractor to protect against freezing and overheating or the manual’s specified coolant mix so the system gets corrosion, freeze and boil protection.
Does old coolant matter in the Kubota GL368?
Yes. Old coolant can lose protection even if temperature looks normal. The listed service interval for the Kubota GL368 is every 2 years and every 2,000 hours.
What engine specs affect Kubota GL368 coolant capacity?
The captured engine context is engine model V1903 and horsepower 36.8 hp (27.4 kW). Engine size is one reason coolant capacity changes between tractors.
Mistakes do happen. Tractor coolant specs can change by year, market, engine, radiator, cab/heater setup and service procedure. Please check the operator manual, decal information and official kubotausa.com website for official information before draining or refilling the cooling system.
