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Curtis B.
Curtis B., Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 28086
Experience:  Technican turned service manager on multiple lines of equipment and rental equipment.
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New Holland 7740 diesel. Lost the sight glass out of the

Customer Question

New Holland 7740 diesel. Lost the sight glass out of the radiator over flow. Over heated. No temp issue til under load then red line and heavy blow-by. No foreign material in oil of lack of pressure. No oil in coolant. No engine miss on knock Head gasket? Cracked head?
Submitted: 1 year ago.
Category: Agriculture and Farm Equipment
Expert:  Curtis B. replied 1 year ago.

Remove the thermostat and see what it does.

Expert:  Curtis B. replied 1 year ago.

When engine overheats, thermostat can be damaged and should be replaced.

Expert:  Curtis B. replied 1 year ago.

Next would be to run a combustion gas test at radiator. Tester pulls the air from top of radiator through a liquid, to see if exhaust gas is present. Most auto supplies have one to rent.