To neutralize exhaust system noise, the following steps must be taken:
Loosen dual converter Y pipe (5F250)
at exhaust manifolds (9430)
, the fasteners at the flat flanges and the
U-clamp at muffler inlet pipe and resonator (5A289)
.
Place a stand supporting muffler (5230)
. Raise muffler
to a height so that the system is parallel to the frame
and the muffler pipe bracket (5277)
is unloaded.
Tighten flat flanges.
Position dual converter Y pipes
to exhaust manifolds
and tighten. Ensure that catalyst heat
shields do not contact frame rails.
Prior to tightening U-clamp on muffler inlet pipe and resonator
, ensure that tail pipe over rear axle housing (4010)
is spaced evenly between rear suspension arm and bushing (5500)
and rear spring (5560)
. Tighten U-clamp.
With complete exhaust system tight (and in cold condition) the rear hanger
strap should be angling forward, to allow the system to expand rearward, when
heated to normal running temperature.