Piston Arrangement - Porsche 928 Workshop Manual

Engine, Crankshaft, Pistons
13
PISTON ARRANGEMENT- 1980/1981/1982/1983 Models
Engine M 28113 and M 28/14
M 28/19 and M 28120
USA, Canada, Japan
Compression ratio 9 : 1
Engine M 29/l 1 and M 28112
Europe and Rest of World
Compression ratio 10 : 1
Ermine M 28109 and M 28/10
Europe and Rest of World
Compression ratio 10 : 1
95 mm diameter (M 28113, M 28114)
97 mm diameter
95 mm diameter
97 mm diameter (M 28/19, M 28/20)
Piston Weight Tolerances
Since 1980 models pistons and piston pins are
paired according to weight. Pistons are weighed
with components (piston pins, piston rings. cir-
clipsl.
If pistons and pins are mixed up, they must be
rearranged by checking the total weight.
Weight = 722 g
Permissible tolerance = 5 4 g
Piston pins must always remain in the correspond-
ing pistons and must not be mixed up within a set
of pistons for one engine. This is important when
disassembling and assembling an engine and pistons
must be marked if necessary.
Printed in Germany ~11, 198~
Piston Arrangement
13.24a