Coolant Concentration

Check the condition and concentration of the engine coolant annually.

Coolant Test Strips

Coolant test strips are available from your John Deere dealer. These test strips provide a simple, effective method to check the freeze point and additive levels of your engine coolant.

Operating without proper coolant additives will result in increased corrosion, cylinder liner erosion, pitting and other damage to the engine and cooling system.

The quality of water used with coolants and additives is extremely important to the performance of the cooling system. Distilled, deionized or demineralized water is recommended for mixing with ethylene glycol and propylene glycol base engine coolant concentrate.

The relative concentrations of glycol and water in the engine coolant determine its freeze protection limit.

Ethylene Glycol	Freeze Protection Limit
40 %	- 24 ° C (- 12 ° F)
50 %	- 37 ° C (- 34 ° F)
60 %	- 52 ° C ( - 52 ° F)
Propylene Glycol	Freeze Protection Limit
40 %	- 21 ° C ( - 6 ° F)
50 %	- 33 ° C ( - 27 ° F)
60 %	- 49 ° C ( - 56 ° F)

DO NOT use a coolant-water mixture greater than 60 % ethylene glycol or 60 % propylene glycol.