Porsche 928 Workshop Manual page 286

9,:
Engine.
Cooling
19
CHANGING COOLANT AND BLEEDING COOLING SYSTEM
Requirement:
Engine cool for draining coolant
1. Set heater lever at
"warm"
and run engine
5. Replace seals for drain plugs on crankcase and
briefly
2. Take off cap on expansion tank.
3. Unscrew drain plug on radiator and catch
coolant.
I
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4. Unscrew coolant drain plugs on left and right-
hand sides of crankcase and catch coolant.
O-ring for drain plug on radiator.
Torques:
Radiator Plug - 1. 5 10 2. 0 Nm (13 to 11 in. lb)
Cmdwase Plug - 45 IO 50 Nm (33 to 36 fr lb)
d. Add coolant until level reacher edge of filler
opening (heater lever must be at "warm").
I. Run engine to operating temperature and check
coolant level. adding more if necessary.
Coolant level must reach center of expansion
tank.
Printed in Germany
Changing Coolant and Bleeding Cooling System
19 - 1