My water bottle keep on cracking what can be the
reason behind that? Ford bantam 1.6 rocam
If you mean the coolant overflow bottle, it can be cracking when filled with water and it freezes. Like the radiator, it should be filled with a 50/50 mixture of coolant and water, giving it a freezing point of minus 35 degrees Fahrenheit. Do not dilute coolant that comes already mixed 50/50.