Caution
Ensure that the vehicle is properly supported and squarely positioned.
To help avoid personal injury when a vehicle is on a hoist, provide additional support
for the vehicle on the opposite end from which the components are being removed.
Important
If the entire intermediate pipe and muffler assembly is being replaced, the
service intermediate pipe must be shortened at the outlet end. Cut the intermediate
pipe right behind the up-sized outlet end.
- Raise the vehicle squarely on a lift.
Important
Always use a chain cutter to cut the stainless steel exhaust system pipes.
- Using the
SA9168NE
or
equivalent, cut the intermediate pipe in front of the rear suspension. Locate the
center (1) of the approximately 100 mm (4 in) long straight
section, mark the pipe, and make the cut.
- Remove the muffler strap fastener and muffler.
- Loosely install
the muffler clamp over the service replacement muffler inlet
- Load the replacement muffler to the vehicle, sliding the muffler inlet
pipe over the cut section of intermediate pipe.
- Hold the muffler in location to muffler strap and tighten the clamp. Locate
the muffler strap between the stamped channel in the muffler.
TightenTighten the muffler strap around the muffler to 22 N·m (16 lbs ft).
Notice
Position the muffler to ensure that there is 19 mm (3/4 in) of
clearance between the muffler and muffler ramp. If proper clearance can
not be obtained, the intermediate pipe must be shortened.
Important
Ensure that after installing the replacement exhaust sections that the system
has not shifted rearward allowing contact between the hanger bracker screw (1)
and the hanger block. This will cause noise. Loosen the muffler strap and shift
forward on the muffler to eliminate contact - retighten.
- Tighten the muffler strap.
TightenTighten the muffler strap around the muffler to 22 N·m (16 lb ft).
Important
Locate muffler clamp 25 mm (1 in) (2) from the end of the
muffler inlet pipe and position clamp with U-bolt facing away from fuel tank.
- Ensure that the muffler clamp is properly located and aligned. Tighten the clamp.
TightenTighten the intermediate pipe to 41 N·m (30 lb ft).
- Check the entire
exhaust system for alignment, clearance to heat shields, and leaks. The muffler
body band clamp blade must be free to move in the hanger or vibrations will be transmitted
from the exhaust system into the body. The muffler can be moved both vertically
and horizontally in the isolator block. The muffler should move 1/16 in.
vertically and 1/8 in. horizontally minimum in the isolator block.
Important
If muffler movement cannot be obtained, or the muffler isolator block is damaged,
the exhaust system will have to be carefully lowered for adjustment or replacement
of the muffler isolator block. Washers may have to be installed between the muffler
block bolt and frame rail to align the hanger parallel with the muffler.
- Tighten the muffler isolator block.
TightenTighten the muffler isolator block-to-body to 25 N·m (19 lb ft).