Banks Power GM Motorhomes: (Gas ’96 - 00 7.4L Vortec) PowerPack system (EFI Vortec, P30 chassis) - Manual (Page 2)

With the vehicle safely raised, ground wire(s)
disconnected, and other precautions in place, the
factory exhaust system can be removed.
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.
disconnect from the headpipes the oval 4-bolt flange
at the front of the catalytic converters. Disconnect
the headpipes from the exhaust manifolds and remove the
headpipe assembly.
if the vehicle is equipped with inner front fender
shields, remove them. unscrew the egr tube at the
rear of the left-side exhaust manifold.
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.
remove the nuts holding the spark-plug wire
heatshields to the exhaust manifold studs. remove
the heatshields.
On the right side of the engine, remove the retaining
clip from the oil pan dipstick socket. unbolt the
brackets from the radiator 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 tube on
the oil pan, place it back onto the dipstick tube.
With a wrench or socket, back the exhaust manifold
nuts at least one turn away from the manifolds. use a
1 ⁄
4
-inch 12-point socket to unscrew each stud from the head.
Take out the studs so the exhaust manifolds can be removed.
NOTE: Whenever possible, it is recommended that the catalytic
converters be inspected. Restricted or damaged catalytic
converters can impede perfomance of your Banks PowerPack.
To install the transmission pan heatshield, remove
three bolts from the transmission pan. position the
heatshield under the pan, aligning the mounting holes, then
reinstall and tighten the original bolts. (figure
1 )
remove the large egr adapter fitting from the rear of
the left-side factory manifold. coat the egr fitting
PREPARATION AND PRECAUTIONS
INSTALLATION PROCEDURE — EXHAUST SYSTEM:
2 p.n. 96373 v.3.0
for ease of installation of your banks powerpack®
system, familiarize yourself with the procedure by
reading the entire manual before starting work. This manual
contains 11 pages of copy, illustrations and parts listing. if any
pages are missing from this manual please call gale banks
engineering immediately for a replacement.
The exploded view of the powerpack assembly
provides only general guidance. refer to each step
and section diagram in this manual for proper instruction.
Throughout this manual, the left-side of the vehicle
refers to the driver’s side, and the right-side to the
passenger’s side.
banks powerpack is designed to fit chevy 454 vortec
class-a motorhome chassis. due to differences in
coach layouts, it may be necessary to relocate or modify some
coach or banks powerpack components to accommodate
installation of the banks powerpack.
disconnect the ground cable from the battery before
beginning work. if there are two batteries, disconnect
both.
route and tie wires and hoses a minimum of 6 inches
away from exhaust heat, moving parts and sharp
edges. clearance of 8 inches or more is recommended where
possible.
The front of your motorhome should be raised a
minimum of 5-6 inches to allow the installation of
banks TorqueTube® exhaust manifolds. if you have access
to a hoist, the vehicle can be elevated and the front wheels
removed for easiest access.
When raising the vehicle, support it on properly
weight-rated safety stands, ramps or a commercial
hoist. follow the manufacturer’s safety precautions. Take
care to balance the motorhome to prevent it from slipping
or falling. When using ramps, be sure the front wheels are
centered squarely on the topsides; put the transmission in
park; set the hand brake; and place blocks behind the rear
wheels. CAuTiOn! Do not use floor jacks to support the vehicle
while working under it. Do not raise the vehicle onto concrete
blocks, masonry or any other item not intended specifically for
this use.
during installation, keep the work area clean. if
foreign debris is transferred to any banks powerpack
component, clean it thoroughly before installing.
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