Vanguard BIG BLOCK M540000, Repair Manual, Page: 22 / 168

3. Remove 3 fasteners to release air guide on starter motor
side of engine. From front to back of engine, air guide
screws are threaded into the intake manifold ( A , Figure
21), back plate ( B ), and crankcase ( C ).
NOTE: Removal of the air guide screws may also release
other parts, such as the blower housing and wire harness or
hose clips. Take note of the location of these components,
so that they may be properly captured when the screws are
reinstalled.
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4. Remove 3 fasteners ( A - C , Figure 22) to release air
guide on oil filter side of engine.
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5. Clean cylinder head and crankcase cooling fins as
follows:
NOTE: Exercise care to keep dust and dirt out of air intake.
Inadequate precautions can result in engine damage.
A. Remove all loose debris by hand.
B. Remove dust and dirt with a soft bristle brush and a
portable hand held vacuum.
C. Gently scrape away stubborn accumulations of dirt
and other deposits using a plastic putty knife or stiff
bristle brush.
D. Apply a light solvent to bristle brush to loosen and
remove grit and oily residue, if necessary.
6. Start 3 fasteners to install air guide on starter motor side
of engine. From front to back of engine, air guide screws
are threaded into the intake manifold ( A , Figure 21), back
plate ( B ), and crankcase ( C ).
NOTE: When the screws are installed, be sure to capture
any other components, such as the blower housing and wire
harness or hose clips noted at disassembly.
7. Tighten air guide to intake manifold and back plate
fastener to 90 lb-in (10.2 Nm). Tighten air guide to
crankcase fastener to 195 lb-in (22 Nm).
8. Start 3 fasteners ( A - C , Figure 22) to install air guide on
oil filter side of engine. Tighten the screws using the
torque specifications in step 7.
9. If equipped, install fasteners ( A , Figure 20) to attach
debris cover ( B ) to blower housing on each side of
engine. Tighten fasteners to 30 lb-in (3.4 Nm).
10. Install spark plug wires onto spark plug terminals.
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