Should the radiator on an international Cub be pressurized? Replaced the radiator on my cub about 2 years back and now I have a gasket leak at the water outlet elbow. As I recall the old radiator had just a cap which was not pressurized. The replaced radiator cap is pressurized and I am wondering if this is what caused the gasket to fail. Thanks for your response.
- Thread starter G.S.G.
- Start date
gene bender
Well-known Member
how can you have pressure without a water pump. Water does expand when warm but the overflow in the neck will let it flow.
BarnyardEngineering
Well-known Member
- Location
- Rochester, NY
You can use up to a 7psi cap.
The gasket leak on the engine is most likely related to age, or improper installation during a more recent service.
The gasket leak on the engine is most likely related to age, or improper installation during a more recent service.
Janicholson
Well-known Member
The gasket just failed, make a new one or buy one. The pressurized system is just fine. The engine doesn't care, and the radiator is made for pressure. Pressure causes the boiling point of the coolant to increase 2 to 3 degrees per pound of pressure. So a 7 psi cap (7psi X 2.5) will increase the boiling point about 18 degrees.
Many tractors with convection cooling (no water pump) make noise and bubble after working hare and can spew out coolant when stopped and shut off. The pressure cap reduces this substantially. Jim
Many tractors with convection cooling (no water pump) make noise and bubble after working hare and can spew out coolant when stopped and shut off. The pressure cap reduces this substantially. Jim
Fritz Maurer
Well-known Member
The water is trapped below the neck by the valve on the radiator cap. The neck on the radiator is the difference. A 154 Lo-Boy has a pressurized system... no water pump
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