Vanguard BIG BLOCK M540000, Repair Manual

Page: 155 / 168

Muffler
1. If equipped with optional muffler bracket support,
proceed as follows:
A. Install 2 fasteners (
F , Figure 218) to fasten bracket
supports ( E ) to crankcase cover () studs. Tighten to
195 lb-in (22 Nm).
B. Install fastener, flat washer, lock washer, and hex
nut ( C ) to fasten muffler ( D ) bracket to bracket
supports. Tighten nuts to 195 lb-in (22 Nm).
218
2. Verify that exhaust manifold and cylinder head flanges
are clean and dry. Install new gaskets ( J ) onto exhaust
manifold flanges.
3. Apply anti-seize compound to threads of 4 fasteners ( H ),
and then install to fasten muffler manifolds to cylinder
heads. Tighten fasteners to 195 lb-in (22 Nm).
NOTE: Depending on your engine model and trim, the
muffler manifold to cylinder head fastener may be replaced
with studs and nuts. Apply anti-seize compound to threads of
studs and tighten nuts to 195 lb-in (22 Nm).
4. Install 2 fasteners ( I ) to fasten muffler bracket to
crankcase. Tighten screws to 195 lb-in (22 Nm).
5. If removed, rotate sensor body hex clockwise to fasten
O
2
sensor ( B ) to muffler. Tighten sensor to 160 lb-in (18
Nm).
6. Connect O
2
sensor connector ( A ).
Air Cleaner Assembly - Cyclonic
1. Install 2 fasteners ( A , Figure 219) to secure air cleaner
bottom bracket ( B ) to fuel pump module bracket support.
Tighten to 138 lb-in (15.6 Nm).
219
2. Install fastener ( C ) to secure air cleaner bottom bracket
to air intake elbow. Tighten to 90 lb-in (10.2 Nm).
3. If equipped, connect MIL/tachometer/hourmeter
connector ( D ) at back of top cover ( E ).
4. Install 4 fasteners ( F ) to secure top cover to air intake
elbow and air cleaner bottom bracket. Alternately tighten
to 90 lb-in (10.2 Nm).
5. Install 2 fasteners ( G ) to secure air cleaner top bracket
( H ) to air cleaner bottom bracket. Tighten to 138 lb-in
(15.6 Nm).
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