If there is no risk of freezing , but it will weaken the strength of the antifreeze / water coolant mixture
You add coolant to the reservoir and in the radiator cap.
In the coolant reservoir in front of the engine.
The water and coolant is put in the coolant reservoir for the location of this refer to the owners manual. It is best to do this when the engine is cold otherwise you run the risk of getting boiling water all over you. the mixture of coolant to water should be about 50/50.
In the coolant reservoir when the engine is cool.
If the reservoir is low, ad a 50/50 mix of coolant and water. Or, buy it premixed and ad as is.
It is not suggested to put water in a Toyota Rav 4. The engine cooling system can get too hot and coolant is preferred. To pour coolant find the coolant reservoir and pour fluid until the max line is filled.
Fill the reservoir with G12 VW coolant only and it will go into the engine.
It is not recommended to put plain water in the engine coolant reservoir as a substitute for coolant. While water can temporarily help lower engine temperatures, it lacks the necessary additives to prevent corrosion, raise the boiling point, and lower the freezing point. If you must use water in an emergency, it’s best to replace it with the proper coolant mixture as soon as possible. Always check your vehicle's manual for specific recommendations.
Add the coolant into the coolant reservoir. Be sure the engine is cool when you remove the cap off the reservoir.
It is possible to put water only in the reservoir for coolant on a car. However, this should only be a temporary fix until it can be repaired by a mechanic.
To add coolant to a 1994 Lexus SC400, first ensure the engine is cool. Open the hood and locate the coolant reservoir, which is typically near the radiator. Remove the cap and pour the appropriate coolant mixture (50% coolant and 50% distilled water) into the reservoir until it reaches the designated fill line. Replace the cap securely before starting the engine to allow the system to circulate the coolant.
In a Mini Cooper, water is typically added to the cooling system through the coolant reservoir, which is usually located near the front of the engine bay. Ensure the engine is cool before opening the reservoir cap, and use a 50/50 mix of coolant and distilled water for optimal performance. Additionally, check the owner's manual for specific guidelines related to your model. Avoid adding water directly to the engine itself.