Gas Temperature - Porsche 911 TURBO - 1989 Workshop Manual

REACTOR AND EXHAUST MANIFOLD GUARD
From 1977 Models all cars for exportation to
Japan will have a guard underneath the reactors
and exhaust manifold to conform with Japanese
legislation.
It is used to shield the radiation of heat and
thus prevent the ignition of waste paper and
similar items, which might be under a parked
car having hot reactors and mufflers.
EXHAUST GAS TEMPERATURE CONTROL
As a further measure against excessive tempera-
tures in the area of the exhaust manifold all
Japan Models will have a system to control the
exhaust gas temperature.
The "EX" indicator lamp will flash while the
engine is running. if the exhaust gas tempera-
0
ture reaches or passes 750 C. and will go out
again when the temperature drops below this
value. Exhaust gas temperatures will never be
that high under normal driving conditions, but
instead only when engine loads are very high.
The flashing indicator lamp tells the driver to
reduce engine loads.
The "EX" indicator lamp will also flash while
the engine is running to show that the tempera-
ture sensor has a defect.
The temperature sensor on the exhaust manifold
measures the exhaust gas temperature. Ii is
connected with an electronic control unit and
the "EX" indicator lamp installed in the instru-
ment panel. The control unit is installed next
to the timer relay for the seat belt warning
system.
Reactor and Exhaust Manifold Guard
Exhaust Gas Temperature Control
26 -29 Printed in Germany
-II, 1976