Banks Power GM Motorhomes: (Gas ’01 - 10 8.1L Workhorse) PowerPack & Stinger systems '01-04 Class-A MH, P-series - Manual (Page 3)

1.
With the vehicle safely
raised, ground wire(s)
disconnected, and other
precautions in place, the
factory exhaust system can
be removed.
2.
Locate the oxygen sensors
in the exhaust headpipes
on each side of the engine,
forward of the catalytic
converters. Unplug the
connectors and unscrew the
oxygen sensors, keeping track
of the left and right sensors.
3.
Remove the hardware
from each of the rear catalytic
converter’s 2-bolt flanges
and disconnect the catalytic
converters from the two
mufflers (see Figure
1 ).
4.
Remove the hardware
from each of the forward
3-bolt head pipe flanges and
disconnect the left and right
head pipes from the exhaust
manifolds. Be sure to mark
the right and left catalytic
converters for reinstallation.
5.
To provide better access
to the exhaust manifolds,
remove the front wheels from
the vehicle. Note: Before
removing the lug nuts, make
sure a capable torque wrench
is available to tighten the lug
nuts to the manufacturer’s
torque specifications. If the
vehicle is equipped with inner
front fender shields, remove
them for improved access.
6.
If applicable, remove the
two nuts securing the EGR
tube to the rear of the right-
side exhaust manifold.
7.
Unbolt the brackets from
the alternator support and
manifold stud. Remove the
dipstick and dipstick tube by
pulling and twisting upward.
If the dipstick tube o-ring is
stuck inside the port in the
engine block, remove the
O-ring and place it back onto
the dipstick tube.
8.
Remove the spark-plug
wires and the spark plugs
from both sides of the engine.
Note their original locations
so they can be properly
reinstalled.
9.
Disconnect the nuts
holding the exhaust manifold
heatshields to the exhaust
manifold studs and remove
the heatshields.
10.
With a wrench or socket,
break loose the exhaust
manifold nuts at least one
turn away from the manifolds
(penetrating oil may assist
in manifold bolt removal).
Use a #7 female torx socket
to unscrew each stud from
the head. If this tool is not
available use a
7 ⁄
32
socket. Take
out the studs so the exhaust
manifolds can be removed.
11.
If the starter cable is
routed to the front of the
motorhome, you will not need
the supplied starter cable
extension. The starter cable
may need to be removed
from the starter and rerouted
to obtain access for the
TorqueTubes. Once the starter
cable is rerouted, using the
supplied wire ties, secure the
installation instructions
Figure 1
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