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V. TROUBLESHOOTING
Below, Tables 9 – 12 are general troubleshooting information. It does not include all potential
problems, symptoms, possible causes or solutions. For the recommended solutions, refer to
other corresponding sections of the manual for more detail. For additional information, contact
Rocore engineering.
Table 9: Coolant troubleshooting
Problem
Symptoms
Possible Causes
Solutions
Coolant
Low coolant
level
Radiator core tube
leak
Repair tube or
replace core
Radiator tube to
header leak
Repair joint or
replace core
Radiator gasket joint
leak
Re-torque bolts (do
not over-torque)
Dry or damaged
gaskets
Replace gaskets
Defective radiator
cap
Replace cap
Air in system settles
out after initial filling
& running
Add additional
coolant
Over pressurization
of the radiator
Repair or replace
damaged
components
Coolant
overflowing
Overheating
See section on
overheating
Surge tank or top
tank initially
overfilled
Drain some coolant
to proper cold fill
level
Surge tank or top
tank not adequate
size for total system
coolant expansion
Replace surge tank
or top tank or add
additional coolant
expansion capacity
Surge tank or top
tank not located at
the high point in the
system
Locate surge tank
or top tank at
highest point in the
system
Dirty coolant
Corrosion, erosion or
poor water quality
Test coolant & use
good quality water
System not cleaned
& flushed before
filling
Drain, clean & flush
system, replace
coolant