Porsche 1972 911 Workshop Manual page 131

C O N N E C T I N G R O D W E I G H T G R O U P S
Connecting rods are in different weight groups,
T h e weight group is indicated by the final digit of t h e part number.
For connecting rods, which are supplied as spare parts, these final digits a r e stamped on the shank.
W e i g h t
above g
N o t e
Only connecting rods, which do not differ in weight by more than 9 g, may b e installed in o n e engine.
To determine a weight group, weigh the complete connecting rod (without bearing shells).
-
W e i g h t
f o r
i n s t a l l a t i o n
C r a n k c a s e , C r a n k s h a f t
f r o m 1 9 7 8 M o d e l
S e r v i c e i n s t a l l a t i o n
c o n n e c t i n g r o d
P a r t N o .
911
C o n n e c t i n g
r o d m a r k i n g