Porsche 928 Workshop Manual page 31

General 928 s
Camshaft
Camshaft drive
Cylinder head
Valve arrangement
Valve timing
Timing (1 mm lift, zero valve
clearance1
Valve clearance
Engine Cooling
Engine Lubrication
Oil filter
Oil pressure at 5000 rpm
Oil pressure indication
Oil consumption
Exhaust System
Emission control
Heating
Fuel System
Fuel supply
II1000 km
Cast steel. running in camshaft housing
without bearing shells
Toothed belt and tensioning roller
Light alloy
1 intake, 1 exhaust, overhead, in-line
By overhead camshaft and hydraulic cam followers
Intake opens 11'ATDC
Intake closes
46'
ABDC
Exhaust opens 25'86DC
Exhaust closes 2' ATDC
Automatic hydr. adjustment
Closed cooling system, mechanical fan with
visco coupling (also electric fan and thermo
switch for cars with air conditioner)
Pressure lubricating system with sickle type
pump
Full flow
Approx. 5 bar at 80 to 100' oil temperature
Indicator lamp and pressure gauge
Approx. 1.5
Double pipes up to catalytic converter, then single
pipe in and out of intermediate muffler, double
pipes in final muffler
Oxygen sensor with 3.way catalytic converter and
secondary air injection
Warm water heater with heat exchanger and blowel
AFC (Air Flow Controlled)
Fuel injection
1 electric delivery pump
0.16
Technical Data
Printed in Germany