TM 5-3895-385-23-1
0087
Table 1. Exhaust System Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Exhaust system blocked or
Inspect muffler for blockage,
1. If blocked, remove blockage from
damaged.
damage, or leaking (WP 0361, Vol
muffler and exhaust system
2).
piping.
2. If damaged or leaking, replace
muffler (WP 0361, Vol 2).
3. If no blockage, damage, or
leaking, proceed to next
malfunction.
2. High-pitched hiss or whistle
Proceed to Corrective Action.
1. If high-pitched hiss or whistle
from exhaust outlet with
from exhaust outlet with
decreased engine output.
decreased engine output,
proceed to abnormal engine
noise (WP 0086).
2. If no high-pitched hiss or whistle
from exhaust outlet with
decreased engine output,
proceed to next malfunction.
3. Exhaust system leak.
1. Inspect connections from cylinder
1. If any connection shows
head to exhaust manifold, from
discoloration, heat damage,
exhaust manifold to turbocharger,
leaks, or burnt paint around
and from turbocharger to muffler
gasket or cylinder head exhaust
for signs of heat damage or
ports, replace as necessary (WP
leaks.
0347, Vol 2; WP 0348, Vol 2; and
WP 0361, Vol 2).
2. If no discoloration, heat damage,
leaks, or burnt paint around
gasket or cylinder head exhaust
ports, proceed to next test.
2. Inspect exhaust manifold for
1. If damaged, replace exhaust
cracks or damage (WP 0348, Vol
manifold (WP 0348, Vol 2).
2).
2. If not damaged, proceed to next
test.
4. Loose or missing exhaust
1. Inspect muffler hardware and
1. If not secure, secure or replace
component hardware.
fasteners for loose fasteners or
loose/missing hardware (WP
missing parts.
0361, Vol 2).
2. If hardware secure, proceed to
next test.