Checking the cooling system for leaks: Notes

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Fig 1: Identifying Special Tools - Cooling System Leak Test

Courtesy of PORSCHE OF NORTH AMERICA, INC.

SPECIAL TOOL DESIGNATION - COOLING SYSTEM LEAK TEST

Item	Designation	Special tool
A	Tester for cooling system tightness test	Commercially available
B	Hose with plug-in coupling
C	Adapter for cap tight- ness test
D	Adapter for closure cap test

NOTE:

Perform the leak test only on a cold engine.

Remove cap and attach tester.

Fig 2: Attaching Tester To Coolant Expansion Tank
Courtesy of PORSCHE OF NORTH AMERICA, INC.
Pump the cooling system up to an excess pressure of 1.3 bar. If the pressure decreases, locate the leak and remedy the fault. Check pressure relief valve(s) in the cap. Screw the tester, adapter and cap together.

Fig 3: Checking Pressure Relief Valve In Coolant Expansion Tank Cap
Courtesy of PORSCHE OF NORTH AMERICA, INC.