55143 Mercruiser CAP, PRESSURE - HEAT EXCHANGER

Table 1
J1939 Code and Description Comments
110-0
Engine Coolant Temperature High - Most Severe (3) The engine coolant temperature has exceeded the trip point and the delay time has expired.
Engine power is shutdown.
The code is logged.
110-15
Engine Coolant Temperature High- Least Severe (1) The engine coolant temperature has exceeded the trip point and delay time has expired.
The code is logged.
110-16
High Engine Coolant Temperature High - Moderate Severity (2) The engine coolant temperature has exceeded the trip point and the delay time has expired.
The code is logged.
Engine power is derated. Probable Causes
Low Coolant Level and/or Coolant Leakage
Coolant Temperature Sensor
Water Temperature Regulator and/or Pressure Relief Valve
Radiator
Heat Exchanger
Engine Cooling Fan (if equipped)
Coolant Pump
Cylinder Head GasketRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Check the Coolant Level
Coolant Level
Result: The coolant level is OK.
Proceed to Test Step 2.
Result: The coolant level is NOT OK.
Repair: Check the cooling system for leaks. Refer to Troubleshooting, "Coolant Level is Low" for additional information. Repair any leaks immediately.
If the problem is not resolved, proceed to Test Step 2.
2. Coolant Temperature Sensor and/or the Circuit
Note: The sensor may be indicating an incorrect temperature that is within the normal range of the sensor.
A. Connect to Cat ET. The temperature should rise steadily as the engine is warmed. Ensure that the temperature is reasonable.
B. Use Cat ET to monitor the following temperature:
- Coolant temperature
Note: The temperature should rise steadily as the engine is warmed.
C. Ensure that the temperature is reasonable.
D. Reference the reading to another temperature indicator when possible. Refer to Testing and Adjusting, "Testing the Cooling System" for additional information.
Sensor
Result: The temperature sensor is OK.
Proceed to Test Step 3.
Result: The temperature sensor is NOT OK.
Repair: Troubleshoot the circuit and the coolant temperature sensor. Refer to Troubleshooting, "Sensor Signal (Analog, Passive) - Test".
If the problem is not resolved, proceed to Test Step 3.
3. Water Temperature Regulator and/or Pressure Relief Valve
A. Pressure-test the cooling system. Refer to Systems Operation/Testing and Adjusting for the correct procedure.
B. Check that the seating surfaces of the pressure relief valve and the radiator cap are clean and undamaged.
C. Check operation of the pressure relief valve and/or the water temperature regulator.
Temperature Regulator
Result: The pressure relief valve and/or the water temperature regulator are operating properly.
Proceed to Test Step 4.
Result: The pressure relief valve and/or the water temperature regulator are not operating properly.
Repair: Clean the components and/or replace the components.
If the problem is not resolved, proceed to Test Step 4.
4. Radiator
A. Check the radiator fins for dirt, debris, and/or damage.
B. Check for collapsed hoses and/or other restrictions.
C. Check the radiator for internal blockage.
Ensure that the radiator size is sufficient. An undersized radiator does not have enough area for the effective release of heat. An undersized radiator may cause the engine to run at a temperature that is higher than normal. The normal temperature depends on the ambient temperature.
Radiator
Result : The radiator fins are not damaged and the radiator does not have an internal blockage.
Proceed to Test Step 5.
Result : The radiator fins are damaged.
Repair: Remove any dirt and/or debris and straighten any bent fins.
Result : The radiator has internal blockage.
Repair: Remove the blockage.
If the problem is not resolved, proceed to Test Step 5.
5. Heat Exchanger
A. Check the cooling fins on the heat exchanger for dirt and for debris.
B. Check for sufficient flow and temperature of the cooling water through the heat exchanger.
C. Ensure that the size of the heat exchanger is sufficient.
Heat Exchanger
Result : The heat exchanger is OK.
Proceed to Test Step 6.
Result : A problem with the heat exchanger has been discovered.
Repair:If the temperature of the cooling water is too high, determine the cause. Clean the components or replace the heat exchanger.
If the problem is not resolved, proceed to Test Step 6.
6. Faulty Engine Cooling Fan (if equipped)
A. If the fan is belt driven, check for loose drive belts.
A loose fan drive belt will cause a reduction in the air flow across the radiator.
B. Check the fan clutch, if equipped.
A fan clutch or a hydraulic driven fan that is not turning at the correct speed can cause improper air speed across the radiator core. The lack of proper air flow across the radiator core can cause the coolant not to cool to the proper temperature differential.
Fan Belt or Clutch
Result : The fan belt is tensioned correctly.
Proceed to Test Step 7.
Result : The fan belt is not tensioned correctly.
Repair: Adjust the tension of the fan drive belt, if necessary. Refer to Operation and Maintenance Manual.
Result : The fan clutch is operating correctly.
Proceed to Test Step 7.
Result : The fan clutch is not operating correctly.
Repair: Refer to Troubleshooting, "Cooling Fan Control - Test" for troubleshooting information.
If the problem is not resolved, proceed to Test Step 7.
7. Inspection of the Coolant Pump
A. Inspect the impeller of the coolant pump for damage and/or erosion.
B. Make sure that the drive gear is not loose on the drive shaft of the coolant pump.
Coolant Pump
Result : The coolant pump is operating correctly.
Proceed to Test Step 8.
Result : The coolant pump is not operating correctly.
Repair: If necessary, replace the coolant pump. Refer to Disassembly and Assembly for the correct procedure.
If the problem is not resolved, proceed to Test Step 8.
9. Cylinder Head Gasket
A. Remove the cylinder head. Refer to the Disassembly and Assembly manual.
B. Check the cylinder liner projection. Refer to the Systems Operation/Testing and Adjusting manual.
C. Pressure test the head for leaks.
D. Install a new cylinder head gasket and new water seals in the spacer plate. Refer to the Disassembly and Assembly manual.
Head Gasket Result : The cylinder head was checked for leaks and the gasket was replaced.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).