Porsche 928 Workshop Manual page 288

928
Engine/Cooling
19
CHECKING COOLANT SYSTEM CAP
3. An adapter (made locally) will be required to
connect the tester on the T-adapter.
1. Mount cap on tester.
2. Produce pressure with hand pump. Pressure valve
should open between 0.9 and 1.15 bar.
Material: steel pipe Sr 35 12 x3
4. Build up about 1 bar pressure in cooling syrrem
by pumping. Pressure valve in cap must open be-
tween 0. '1 and 1.15 bar.
5. Visually inspect rhe following parts for leaks.
Engine block: Wager pump
Cylinder head gasket
Thermostat housing
Hose connecrionr
Cylinder head mounting studs
Radiator: Bleeder neck
Water drain plug
Hose connections
Oil cooler cap
Temperature switch or
Plug
Heater: Hose connecrions
Printed inGermany _ IV, 1980
Checking Coolanr System Cap 19 - 2a