Banks Power GM Motorhomes: (Gas ’96 - 00 7.4L Vortec) PowerPack system (EFI Vortec, P12 chassis) - Manual (Page 4)

FiGuRE 1
For Stinger installation proceed to step 24.
With the vehicle safely raised, ground wire(s)
disconnected, and other precautions in place, the
factory exhaust system can be removed. To ease bolt
removal, a penetrating lubricant may be sprayed on all
fasteners as well as the egr fitting on the left manifold.
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.
remove the nuts on each 3 bolt flange at the front of
the catalytic converters. disconnect the headpipes
from the exhaust manifolds and remove each headpipe from
the vehicle.
unscrew the egr tube at the rear of the left-side
exhaust manifold. remove the dipstick retaining clip
from the oil pan.
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.
unbolt the dipstick tube screw from the mounting
bracket. separate the two sections of the tube and
remove the lower portion from the vehicle.
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 the location of one bolt rather than a stud.
This bolt will be reinstalled in this location on reassembly.
NOTE: Whenever possible, it is recommended that the catalytic
converters be inspected. Restricted or damaged catalytic
converters can impede perfomance of your Banks PowerPack.
remove the large egr adapter fitting from the rear
of the left-side factory manifold. coat the egr fitting
threads with anti-seize compound to prevent galling and
install it onto the left TorqueTube manifold. (Figure
1 )
inspect the exhaust mounting surfaces of the cylinder
heads and remove rust or carbon, which would
prevent the TorqueTube manifolds from sealing.
NOTE: Do not use the factory exhaust manifold gaskets
upon reinstallation. Banks torque tubes are machine
surfaced and are designed to seal without gaskets.
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InSTAllATIOn PROCEDuRE — EXHAuST SYSTEM:
4 p.n. 96393
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