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Static Pressure Test (Engine Off)
For diagnosing:
Cooling system leaks.
Always read instructions carefully prior to use.
WA R N I N G
Never remove the radiator cap or expansion tank cap while the
engine is at operating temperature. Always allow the engine to cool
before removing the radiator cap or expansion tank cap. The coo-
ling system is under pressure. Failure to allow the engine to cool
before opening the cooling system could result in serious injuries.
Notice
!
Some late-model vehicles are equipped with radiator tanks
and expansion tanks made of plastic. Excessive over-tighte-
ning of the expansion plug could result in cracking of the radiator
or expansion tank. Use caution when tightening expandable rubber
plug.
Always refer to the manufacturer's instructions for the particular
radiator pressure tester that is being used.
Set-up & Procedure:
1.
Ensure the cooling system is cool and not pressurized.
Carefully remove the radiator or coolant bottle pressure cap.
2.
Check to see that the radiator or coolant bottle is filled to the
proper level, and check hoses for visual damage or leaks.
Fill and repair as necessary prior to testing.
3.
Turn the top tension knob (1) counter-clockwise and the
bottom tension knob (2) clockwise until all the tension
has been relieved from the expandable rubber adapter
(3).
4.
Thoroughly wipe inner diameter of filler neck or expan-
sion bottle with a clean shop rag to remove any coolant
residue. Many coolants act as lubricants and can cause
the Universal Radiator Adapter to slip out during pressure
testing.
5.
Insert expandable rubber adapter (3) of the Universal
Radiator Adapter into the filler neck of the radiator or
expansion tank.
6.
While holding the bottom knob, rotate the top knob of the
adapter clockwise until rubber fully engages the interior
wall of the filler neck.
Chart A: Cooling System
Rated Pressure (PSI)
4
7
10
13 or 14
15 or 16
18
20
30
Page Number - 5
Cap Pressure Test Ranges
Pressure Test Range (PSI)
3 - 5
6 - 8
9 - 11
12 - 16
14 - 18
16 - 20
18 - 22
28 - 30
7.
Pull up on the adapter with reasonable force to ensure it
holds firmly in place.
8.
To test this connection, hold the tank of the radiator or
the top of the expansion tank, grip the Universal radiator
adapter and slowly pull up on the adapter. The adapter
should hold firmly in the filler neck. If necessary, tighten
the expandable rubber plug further by turning the tension
knobs further.
9.
Install the Pressure Pump onto the System Adapter using
the quick-connect. Make sure the quick-connect sleeve
snaps forward to lock the connection.
10. Operate the Pressure Pump until the needle on the
sure gauge moves to the end of the colored band indi-
cating the appropriate pressure range of the cap (see
Chart A).
11. Watch the gauge for a short period of time. If the pressure
reading drops, a leak is present.
12. With the system still pressurized, perform a visual inspection
of the entire cooling system. Check hoses and connections
for seepage, which would indicate a leak. Return to the
gauge and check the reading once more.
13. Most leaks are external, and visible seepage occurs.
However, a drop in pressure with no visible leakage can
indicate a blown head gasket or cracked block, where fluid
leaks into the combustion chamber. Visually inspect oil and
transmission fluid for signs of coolant.
14. When testing is complete, release the pressure in the sys-
tem by pressing the Pressure Relief Valve located on the
pump hose near the quick-connect coupler.
15. Repair leaks if necessary, and retest.
16. Disconnect components, clean and store them properly.
17. Refill the radiator or coolant bottle to the proper level, and
replace the cap.
pres-
1
2
3
Form 801943
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