Muffler And Tailpipe - Early Build Removal; Front Exhaust Tailpipe Hanger - Jeep 200 Cherokee Service Manual

XJ
REMOVAL AND INSTALLATION (Continued)
Fig. 15 Catalytic Converter—Late Build
1 – NUT
2 – CATALYTIC CONVERTER TO MUFFLER FLANGE JOINT
3 – CATALYTIC CONVERTER
4 – GASKET
5 – EXHAUST PIPE FLANGE JOINT
(3) Tighten catalytic converter to exhaust pipe
flange mounting nuts to 28.5 N·m (21 ft. lbs.).
(4) Install oxygen sensor into catalytic converter.
Connect oxygen sensor.
(5) Lower vehicle.
(6) Start engine check for leaks.
MUFFLER AND TAILPIPE—EARLY BUILD
All original equipment exhaust systems are manu-
factured with the exhaust tailpipe welded to the muf-
fler. Service replacement mufflers and exhaust
tailpipes are either clamped together or welded
together.
WARNING: IF TORCHES ARE USED WHEN WORK-
ING ON THE EXHAUST SYSTEM, DO NOT ALLOW
THE FLAME NEAR THE FUEL LINE.
CAUTION: When servicing exhaust system compo-
nents, disconnect the oxygen sensor connector.
Allowing the exhaust system to hang by the oxygen
sensor harness will damage the wiring and/or sen-
sor.
REMOVAL
(1) Raise and support the vehicle.
(2) Disconnect front tailpipe hanger from the insu-
lator (Fig. 16).
(3) Remove the front exhaust clamp from the cat-
alytic converter and muffler connection (Fig. 17).
Fig. 16 Front Exhaust Tailpipe Hanger
1 – MUFFLER
2 – INSULATOR
3 – TAILPIPE
4 – FRONT TAILPIPE HANGER
(4) Heat the catalytic converter-to-muffler connec-
tion with an oxyacetylene torch until the metal
becomes cherry red.
(5) While the metal is still cherry red, remove the
exhaust muffler/tailpipe assembly from the catalytic
converter.
(6) Slide the muffler/tailpipe assy. rearward and
out of the rear exhaust tailpipe mounting bracket
(Fig. 17).
(7) Remove the muffler from the exhaust tailpipe:
• To remove an original equipment exhaust muf-
fler/tailpipe combination, cut the exhaust tailpipe
close to the muffler. Collapse the part remaining in
the muffler and remove.
• To remove a service exhaust tailpipe/muffler
combination, apply heat until the metal becomes
cherry red. Remove the exhaust tailpipe/muffler
clamp and twist the exhaust tailpipe out of the muf-
fler.
EXHAUST SYSTEM
2000 XJ Service Manual
Publication No. 81-370-0046
TSB 26-03-00 March, 2000
11 - 9