Owner’s Manual for Indirect Fired Heater
27
Troubleshooting
Engine overheats
Restricted or dirty air cleaner.
Replace air cleaner element as
required.
Insufficient coolant in cooling system.
Fill cooling system to proper level.
Check radiator and hoses for loose
connections or leaks. See
Insufficient engine oil.
Check oil level. Add oil as required.
See
Draining and Refilling the Oil
Dirty radiator core.
Clean cooling system as required.
Cooling system needs flushing.
Flush coolant system.
Engine overloaded.
Reduce engine load.
Loose or faulty fan belt.
Check automatic belt tensioner and
belts. Replace as required.
Faulty or incorrect type of thermostats.
Test thermostat opening temperature,
replace thermostats as required.
Faulty radiator cap.
Replace radiator cap as required.
Faulty temperature gauge or sender.
Check coolant temperature with ther-
mometer and replace if necessary.
Incorrect grade of fuel.
Drain fuel and replace with proper
grade and quality of fuel for operating
condition.
Damaged or leaking cylinder head gasket.
Contact a GMP ASD.
Faulty coolant pump.
Coolant temperature below
normal
Faulty thermostat(s).
Test and replace thermostat(s) as
required.
Faulty temperature sender.
Check gauge, sender, and connec-
tions.
Coolant in crankcase
Faulty cylinder head gasket.
Contact a GMP ASD.
Cracked cylinder head or block.
Leaking cylinder liner seals.
Pitted cylinder liners.
Leaking EGR cooler system.
Faulty coolant pump seal; weep hole
plugged; coolant leaking through bearing.
Problem
Cause
Solution
