Answer
Apr 07, 2023 - 02:58 PM
The following are the general steps to troubleshoot an overheating issue on an oil cooler on a boat:
Check for blockages: A common cause of overheating in oil coolers is blockages in the seawater supply. Check in for blockages in the inbound water or grass or debris in the strainer.
Check for water pump issues: The water pump (which may be electric or mechanical) is responsible for circulating water through the cooling system. Check for issues such as a faulty impeller, worn bearings, or loose belts that can prevent the water pump from working properly. Worn impellers reduce the fluid speed and can cause an increase from 190 to 210. Faulty or broken impellers can have a more drastic impact on the boat’s engine operating temperature.
Check for clogs in the heat exchanger water passage. Follow from the strainer to the heat exchanger to determine where the inbound seawater port is. The heat exchanger is responsible for transferring heat from the coolant (hot side) to the seawater (cool side). If there are any clogs or blockages in the heat exchanger, it can cause the oil to overheat. Check the heat exchanger seawater circuit for any debris or sediment buildup that can clog the tubes. You can also remove the inbound seawater hose to see if there is sufficient water coming to the engine.
Check for insufficient coolant levels: Low coolant levels can cause the engine’s fluids to overheat. Check the coolant levels and top up as needed.
Check for thermostat issues: A faulty thermostat can cause the engine to overheat forcing the antifreeze / glycol through the overflow port of the thermostat housing. Check the thermostat for proper operation by removing the thermostat housing and test for proper operation.
Check the cooling device for damage: If none of the above steps resolves the issue, it may be necessary to remove the oil cooler from the boat and inspect it for any signs of damage or wear.
Seek professional assistance: If the issue persists, it is best to seek the assistance of a qualified marine mechanic to diagnose and repair the issue
©2023 Mr. Cool Marine LLC
Check for blockages: A common cause of overheating in oil coolers is blockages in the seawater supply. Check in for blockages in the inbound water or grass or debris in the strainer.
Check for water pump issues: The water pump (which may be electric or mechanical) is responsible for circulating water through the cooling system. Check for issues such as a faulty impeller, worn bearings, or loose belts that can prevent the water pump from working properly. Worn impellers reduce the fluid speed and can cause an increase from 190 to 210. Faulty or broken impellers can have a more drastic impact on the boat’s engine operating temperature.
Check for clogs in the heat exchanger water passage. Follow from the strainer to the heat exchanger to determine where the inbound seawater port is. The heat exchanger is responsible for transferring heat from the coolant (hot side) to the seawater (cool side). If there are any clogs or blockages in the heat exchanger, it can cause the oil to overheat. Check the heat exchanger seawater circuit for any debris or sediment buildup that can clog the tubes. You can also remove the inbound seawater hose to see if there is sufficient water coming to the engine.
Check for insufficient coolant levels: Low coolant levels can cause the engine’s fluids to overheat. Check the coolant levels and top up as needed.
Check for thermostat issues: A faulty thermostat can cause the engine to overheat forcing the antifreeze / glycol through the overflow port of the thermostat housing. Check the thermostat for proper operation by removing the thermostat housing and test for proper operation.
Check the cooling device for damage: If none of the above steps resolves the issue, it may be necessary to remove the oil cooler from the boat and inspect it for any signs of damage or wear.
Seek professional assistance: If the issue persists, it is best to seek the assistance of a qualified marine mechanic to diagnose and repair the issue
©2023 Mr. Cool Marine LLC
