Test coolant system for leaks, Page 12 – MAHLE RTI MCX-2F (Rev D) User Manual
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EM
PTY
WA
STE
TA
NK
EXC
HA
NG
E C
OOL
ANT
FILL
RA
DIA
TO
R
& O
VER
FLO
W
SYS
TEM
PR
ESS
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E
TES
T
LOW
ER
RA
DIA
TO
R
& O
VER
FLO
W
EM
PTY
W
AST
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NK
Overflow
EM
PTY
WA
STE
TAN
K
Step
Adapters
Hose
OFF
Radiator
Black Hose
Green Hose
OFF
SYS
TEM
VA
CUU
M
& O
VER
FLO
W
LOW
ER R
ADIA
TOR
EXC
HAN
GE C
OOL
AN
T O
R
FILL
RA
DIA
TOR
& O
VER
FLO
W
Radiator
Block
Engine
EM
PTY
WA
STE
TAN
K
OFF
Pump
Water
& O
VER
FLO
W
LOW
ER R
ADIA
TOR
& O
VER
FLO
W
FILL
RA
DIA
TOR
TES
T
EXC
HAN
GE C
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LAN
T
SYS
TEM
PR
ESS
URE
Heater
Core
FILL
RA
DIA
TOR
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HAN
GE C
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OFF
Hose
Adapter
TEST COOLANT SYSTEM FOR LEAKS
The MCX-2F can be used to check the coolant system for leaks. The coolant system
is pressurized and the System Pressure Gauge on the MCX-2F is monitored for a drop
in pressure which would indicate a system leak.
The MCX-2F should be connected a shown above.
1. Turn both valves on front of MCX-2F to EXCHANGE.
2. Turn control valve to TEST.
3. Press the top of EXCHANGE COOLANT OR FILL RADIATOR & OVERFLOW
selector switch to turn on the pump.
4. Watch the System Pressure Gauge and press the bottom of the EXCHANGE
COOLANT OR FILL RADIATOR & OVERFLOW selector switch when the
pressure reaches 10 to 13 PSI.
5. The coolant system is now pressurized. Monitor the pressure for a constant
reading. A coolant system leak is indicated if the pressure falls.