3.9 and B5.9 Series Engines
Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms
This is symptom tree T019.
Check the coolant level. Refer to the OEM
Coolant level is above specification
Inspect the engine and its components for
seal, gasket, or draincock leaks. Inspect the
xternal engine leak
and connections. Pressurize the cooling
system if necessary to determine source of
leak. Refer to the OEM's service manual.
ooling system hose is collapsed, restricted, or
Inspect the radiator hoses. Refer to Procedure
ooling system pressure cap is not correct, is
Inspect the pressure cap. Refer to Procedure
malfunctioning, or has a low-pressure rating
Check and review OEM plumbing to make sure
no high-pressure coolant can cause backflow.
Check vent lines and fill line for restriction.
oolant loss through radiator overflow
Refer to the Application Engineering Bulletins,
Midrange Cooling Requirements, AEB 90.24,
and Coolant Recovery System, AEB 91.07.
Check the transmission oil cooler and torque
ransmission oil cooler or torque converter
converter cooler for coolant leaks. Refer to the
cooler is leaking
Remove and pressure test turbocharger.
et exhaust manifold and turbine housing
Replace if necessary. Refer to Procedure
(marine and firepump engines only)
010-033 or 010-049.
Check for coolant in the oil. Refer to the
oolant is leaking into the lubricating oil
Coolant in the Lubricating Oil symptom tree.