Banks Power GM Motorhomes: (Gas ’82 - 95 7.4L) PowerPack system (Carbureted, single air pump) - Manual (Page 10)

reinstall the air injector nozzles and tube
assemblies on the new exhaust manifolds.
hook up the hoses to the tube assemblies. use anti-
seize on the threads.
reinstall the hot air tube from the front of the
right exhaust manifold to the air cleaner inlet.
reattach spark plug wires. Make sure wires
are attached to the proper spark plugs. engine
firing order is 1-8-4-3-6-5-7-2, with 1, 3, 5 and 7 on
the left (driver’s) side, front to back, and 2, 4, 6 and
8 on the opposite side, front to back. Make sure plug
wire boots are pushed on firmly for good electrical
contact, and wires are routed as far away as pos-
sible from manifold pipes to prevent heat damage. if
the condition of the spark plug wires look marginal,
replace with a good quality silicone insulated sup-
pression type wire set.
open a number 56 hose clamp and thread it
through the slots on the oil filter heat shield.
See Figure 12. Position the heat shield on the oil
filter to provide protection from the closest manifold
pipe, then tighten clamp.
install an exhaust “doughnut” seal in the right
exhaust manifold outlet flange. lightly tap the
seal into place with a hammer until it seats.
install three 3 ⁄
8
” x 2 1 ⁄
4
” studs in the right
exhaust manifold outlet flange. two 3 ⁄
8
coarse thread nuts jammed against each other on
the outer stud threads may be used to wrench the
studs into place. use anti-seize compound on the
threads.
install three 3 ⁄
8
” x 2 7 ⁄
8
” studs in the left
exhaust manifold outlet flange. use anti-
seize compound on the threads.
remove the old “doughnut” seal from the
heat riser valve (ePr) if still attached, and
replace with new seal provided. lightly tap the seal
into place to seat it.
Slide the heat riser valve into position on the
studs of the left exhaust manifold outlet. note
that the actuating diaphragm faces up and to the left.
remove the forwardmost exhaust pipe
hanger from the right hand frame rail. install
the hanger extension bracket, provided, on the
frame rail at this location. use two 3 ⁄
8
–16 x 1” hex
bolts, two 1” o.d. x 7 ⁄
16
” i.d. flat washers, and two
3 /
8
–16 crimp locknuts to secure the extension. See
Figure 13.
reinstall the exhaust pipe hanger to the exten-
sion bracket using the original bolt, nut, and
washer.
install the banks exhaust head pipes and muf-
fler using the original nuts, washers, springs,
etc. use anti-seize on the threads. Position the pipes
such that they can mount in the two forwardmost
exhaust pipe hangers. tighten all nuts, clamps, etc.
See Figure 1.
working from the muffler back, install the
tail pipe sections most appropriate for your
vehicle. because of various chassis lengths and con-
figurations, your tail pipe hangers may or may not
line up properly for the tail pipe routing. we have pro-
vided three universal tail pipe hangers that may be
attached to crossmembers, frame rails, etc. with the
remaining 3 ⁄
8
–16 x 1” hex bolts, nuts, and washers.
See Figure 1 for tail pipe assembly. Maintain 1 1 ⁄
2
” of
clearance to frame and body to prevent rattles and
hot spots.
install the chrome tailpipe extension tip and
chrome tailpipe heat shield per Figure 1.
extension tip may be slid in or out over tailpipe
until desired length is obtained for body width. then
clamp extension to tailpipe using 3” u-clamp.
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fIguRe 13
fiGure 14
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