TM 5-3810-300-24&P-3
6
Exhaust Manifold
Inspection
Remove the loose scale and carbon that may have
accumulated on the internal walls of the exhaust
manifold.
Examine the exhaust manifold studs for damage. If
necessary, replace the studs. New studs are driven in to
25-40 Ib-ft torque.
Fig. 2 - Metal Clad Exhaust Manifold Gasket
Install Exhaust Manifold
1. Place a new gasket(s) over the studs and up
to 30-35 lb-ft torque (cast iron head) or 25-30 lb-ft torque
against the cylinder head.
(aluminum head).
CAUTION: When installing the metal clad
exhaust manifold gasket(s), be sure the crimped
NOTE: If the cylinder head was removed from
side of the gasket (Fig. 2) faces the cylinder
the engine, do not tighten the manifold nuts until
head.
AFTER the head is reinstalled. Otherwise,
interference may be encountered between the
manifold and the cylinder block bosses which
2. Position the exhaust manifold over the studs and
serve as a support for the manifold when the
against the gasket(s).
cylinder head is installed.
3. Install the bevel washers, end crabs and nuts on the
5. If the exhaust manifold is mounted on the blower
studs.
side of the engine (Fig. 1), install the governor control
housing, air compressor and the air inlet housing.
NOTE: Install the bevel washers with the crowned
sides toward the nuts.
6. Connect the exhaust pipe to the manifold. When
4. Then, starting with the center nut and working
brass nuts are used to secure an outlet flange to the
alternately toward each end, tighten the manifold nuts
manifold, tighten the nuts to 20-25 Ib-ft torque.
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