INTERPRETATION OF RESULTS
A. Gauge Pressure Stable:
If the gauge does not drop over a period of several minutes there are no serious
leaks in the system. Examine all joints for seepage or slight leakage.
B. Gauge Pressure Drops Slowly:
A small leak is likely present. Check radiator, water pump, hoses, gaskets and
heater. After repairing leaks, re-test system.
C. Gauge Pressure Drops Quickly:
A large leak is present. Look for any external sign of coolant. If no coolant is
visible, an internal leak is indicated. Check heater core, engine oil and
transmission fluid.
Detection of compression or combustion leakage into the cooling system.
A. With the
COOLING SYSTEM COOL
, remove cap. Install pump onto system.
B. Start engine and let idle. As engine warms up, watch pressure gauge. If gauge
pressure vibrates or rises rapidly, turn off engine immediately.
DO NOT ALLOW
THE PRESSURE TO EXCEED THE SYSTEM SPECIFICATIONS.
A vibrating or fast
pressure rise indicates a blown head gasket. Carefully remove tester after
system cools.
Once testing is complete, release pressure in the cooling system by turning the
tester head
LEVER
clockwise until it moves up the ramp cams (Fig 1). With pressure
released, rotate tester
HEAD
counter-clockwise to remove.
5
INTERPRETATION OF RESULTS
Figure 2
Figure 1
