Porsche 1972 911 Workshop Manual page 70

C H E C K I N G R E A C T O R FOR LEAKS
N o t e
T h e reactor's operation need not be checked. It
only needs to b e checked for leaks.
1. Let engine run at idle.
Insert appropriate plug in outlet pipe of
2.
muffler and check reactors for leaks by listen-
ing. Replace a leaky reactor.
C o o l i n g , e x h a u s t a n d e m i s s i o n c o n t r o l s y s t e m s
911