TM 5-3805-262-34
2-4. ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE HARD TO START OR WILL NOT START (NO EXHAUST SMOKE) (Cent).
Step 7.
Check valve timing (page 3-8).
a. If valve timing is not okay as indicated by dial indicator hand
not indicating 0.053 inch, go to Malfunction 11, page 2-41.
b. If valve timing is okay as indicated by dial indicator hand in-
dicating 0.053 inch, compression leakage is either past valves
or a damaged cylinder head gasket. Remove cylinder head (page
3-45) associated with bad cylinder and check gasket. If cylinder
head gasket is okay, remove and replace valves (page 3-74).
Step 8.
Remove muffler (refer to TM 5-3805-262-20).
Repeat engine compression check (page 3-12).
a. If compression check readings are normal, problem was restricted
muffler. Replace muffler (refer to TM 5-3805-262-20).
b. If compression check readings are still high, there are exces-
sive carbon deposits in engine. Remove cylinder head (page 3-45)
associated with bad cylinder and remove carbon deposits from
cylinder sleeves (page 4-43). If carbon deposits are not pre-
sent, use micrometer and check cylinder head height. Replace if
head height is less than 4.080 inches (page 3-45).
Step 9.
Remove five capscrews securing gear cover and gasket to timing gear
cover.
Discard gasket.
Check fuel injection pump drive gear to idler gear backlash using
dial indicator.
Backlash should be 0.012 inch.
2-7
