Fl
EXHAUST
EMISSION CONTROL SYSTEMS The
air distribution manifold should be installed
after the exhaust manifold assembly is torqued
to the cylinder head. The recommended procedure
for exhaust manifold assembly installation is as follows:
Clean
the mating surface of both the
manifold and cylinder head.
Install
the exhaust manifold to the cylinder head using a new gasket.
Tighten
the manifold to cylinder head, attaching
bolts
down evenly.
Finish
torque tightening to 29
to 35 ft. lbs. [3,4 a 4,8 kg-m.].
Fl-23.
REQUIRED
EQUIPMENT
Each
station licensed to perform repair and main
tenance on the Exhaust Emission Control System
must be equipped with that equipment necessary
for major
engine
tune-up analysis which shall in clude at least the following or equivalent.
Ignition Analyzer Oscilloscope
Ammeter
Ohmmeter
Voltmeter Tachometer
2 Vacuum Gages
Pressure
Gage (0-10 psi.)
Cam
Angle Dwell Meter Ignition Timing
Light
Engine
Exhaust Combustion Analyzer Compression Tester
Fl-24.
REPLACEMENT
PARTS
Parts
necessary to repair and/or maintain the
Exhaust
Emission Control System are available through any Jeep
SALES CORPORATION
ware
house.
Fl-25.
WARRANTY
All
parts of the Exhaust Emission Control System
are
covered by the Manufacturer's Warranty as stated in the Warranty Service and 'Jeep' Quality
Maintenance Plan booklet.
Fl-26.
EXHAUST EMISSION CONTROL
SYSTEM
DIAGNOSIS GUIDE
Pump Noisy
Hoses Touching Other Parts of Engine or Body (Hood).
Note:
The air pump is not completely noiseless.
Under
normal conditions, pump
noise
rises in pitch as
engine
speed
increases. It is also desirable to
allow for normal break-in wear of the pump prior
to replacement for excessive noise.
Pump Seized
Replace
pump.
Leak
In
Hose
Check
for leaks; using
soap
and water — tighten
clamps or replace
hoses.
Pump
Inoperative
Loose Belt — tighten belt — do not pry on housing.
Filter
Plugged — replace.
Exhaust Backfire
Check
for vacuum leaks — correct as necessary.
Check
air filter for excessive
restriction
— replace as necessary.
Check
anti-backfire valve — replace as necessary.
Induction System Backfire
Verify
engine
timing and distributor dwell.
Verify
accelerator pump charge. 146
'Jeep'
UNIVERSAL
SERIES SERVICE
MANUAL
F2
F2-26.
Anti-Backfire
Valve
The
anti-backfire valve removal requires discon necting the
hoses
and bracket to
engine
attaching
screws.
F2-27.
Air Distribution Manifold and
Injection
Tubes
The
air distribution manifolds can be removed
from the cylinder heads without removing the
cylinder
head assemblies. Disconnect the air delivery
hose
from the pump at
the distribution manifold inlet (check valve).
Loosen the distribution manifold
tube
attaching nuts from the cylinder head and carefully work the
distribution manifold away from the cylinder head.
The
air injection
tubes
can be removed from the
cylinder
head with head on the
engine.
Insert
an easy-out through the
boss
opening on the
cylinder
head
into
the injection
tube
and twist
the
tube
out gradually. Some interference to re moval may be encountered due to normal carbon
build-up on the tubes. Injection
tubes
removed in
this manner should be replaced.
The
injection
tubes
used are all of the same diam
eter and length.
F2-28.
REQUIRED EQUIPMENT
Each
station licensed to perform repair and main tenance on the Exhaust Emission Control System
must be equipped with that equipment necessary
for major
engine
tune-up analysis which shall in clude at least the following or equivalent:
Ignition Analyzer Oscilloscope
Ammeter
Ohmmeter
Voltmeter
Tachometer 2 Vacuum Gauges
Pressure
Gauge (0-10 psi.)
Cam
Angle Dwell Meter
Ignition Timing
Light
Engine
Exhaust Combustion Analyzer Compression Tester
F2-29.
REPLACEMENT PARTS
Parts
necessary to repair and/or maintain the Ex
haust Emission Control System are available through any Jeep
SALES
CORPORATION
ware
house.
F2-30.
WARRANTY
All
parts of the Exhaust Emission Control System
are
covered by the Manufacturer's
Warranty
as stated in the
Warranty
Service and 'Jeep' Quality
Maintenance Plan booklet. 157
