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EXHAUST SYSTEM
6F-1
SECTION 6F
EXHAUST SYSTEM
CAUTION: Exhaust system components should have enough clearance fi-om the underbody to avoid overheating and
possible damage to the passenger compartment carpets. Minimum clearances are:
B Series Pipes and Converter
................................................................
26MM (1
")
B Series Muffler
...................................................................................
15MM
(5/8")
A, F, X, H
&
G Series
......................................................................................
5/8"
CONTENTS OF THIS SECTION
General Description
..................................................................................................
Exhaust Pipe
.........................................................................................................
Muffler.
..................................................................................................................
..............................................................................................................
Resonator
...................................................................................................................
Hanger
Clamp
....................................................................................................................
Catalytic Converter
...............................................................................................
On-Car Service
..........................................................................................................
..................................................................................................................
Catalyst
Bottom Cover
........................................................................................................
GENERAL DESCRIPTION
When
inspecting
or
replacing
exhaust
system
components make sure there is adequate clearance from all
points on the underbody to avoid possible overheating of the
floor pan and possible damage to the passenger compartment
insulation and trim materials.
Check complete exhaust system and nearby body areas
and trunk lid for broken, damaged, missing or mispositioned
parts, open seams, holes, loose connections or other
deterioration which could permit exhaust fumes to seep into
the trunk or passenger compartment. Dust or water in the
trunk may be an indication of a problem in one of these areas.
Any defects should be corrected immediately. T o help insure
continued integrity, the exhaust system pipe rearward of the
muffler must be replaced whenever a new muffler is installed.
EXHAUST PIPE
The exhaust manifold to crossover pipe connections are
of the ball type, thus eliminating the need for gaskets.
MUFFLER
All mufflers are a tri-flow design. Some muffler
installations have a slot in the inlet and/or outlet pipe which
indexes to a key (tab) welded on the exhaust and/or tail pipe
to help maintain alignment.
RESONATOR
A resonator is used on some series exhaust systems. It
allows the use of mufflers with less back pressure and
provides for optimum tuning characteristics of the exhaust
system.
HANGER
Two types of hangers are used to support the exhaust
system. One type is a conventional rubber strap and the
second type is a "rubber block". The rubber block type
provides a rigid hanger along with a feature that continues
to support the exhaust system in the event a rubber insulator
block is broken.
The installation of exhaust system supports is very
important as improperly installed supports can cause
annoying vibrations which are difficult to diagnose.
CLAMP
Two methods are used for connecting exhaust system
slip joints, (1) clamp and (2) weld. When servicing a welded
connection it should be cut and the new connection clamped
when installing replacement parts. Also, coat slip joints with
exhaust system sealer before assembling (Fig. 6F-1).
CATALYTIC CONVERTER
The catalytic converter is an emission control device
added to the exhaust system to reduce hydrocarbon and
carbon monoxide pollutants from the exhaust gasstream. The
converter contains beads which are coated with a catalytic
material containing platinum and palladium.
T H E CATALYTIC CONVERTER REQUIRES THE
USE O F UNLEADED FUEL ONLY.
Periodic maintenance of the exhaust system is not
required; however, if the car is raised for other service, it is
advisable to check the general condition of the catalytic
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