TNV IDI Service Manual
13-7
Troubleshooting Charts
TNV IDI Service Manual
TROUBLESHOOTING
Troubleshooting Charts
Trouble Symptom
Starting Problem
Insufficient
Engine
Output
Poor
Exhaus
t Color
High Kno
c
kin
g
Soun
d Du
rin
g
Comb
ustio
n
Ab
no
rm
a
l En
g
ine
So
un
d
Uneve
n Co
mbu
s
ti
on
So
un
d
Engine
Surging
Exce
ssive Engi
ne Vibr
at
ion
Difficulty
in
Returning to Low Speed
Exce
ssive Fue
l Co
nsump
tio
n
Engine Oil
Ex
ce
ss
iv
e Bl
ow
-b
y G
as
Engine
Coolant
Air
Intake
Exhau
st
Tem
per
at
ur
e Rise
Corrective Action
Reference Page
Eng
ine Doe
s
Not
St
ar
t
Engine
Starts But
Stops Soon.
Exhaust
Color
During
Work
During Idling
Dur
ing Wor
k
Op
er
at
ion
Exc
e
s
s
ive Oil Consumption
Dilution
by
Diesel Fuel
Oil with W
a
ter
Lo
w O
il
Pr
essu
re
Over
he
at
Lo
w Wat
er
Temp
er
at
ur
e
Pr
es
sur
e
Dr
op
Pres
sure Rise
Exhaust
Smoke
Or
din
ar
y
White
Black
White
Black
Cause
None
L
ittle
Mu
ch
En
gin
e
Syst
em
Improper Intake/Exhaust Valve
Clearance
O
O
O
O
O
O
Adjust the Valve Clearance.
Valve Clearance” on page 6-32.
Compression Leakage from Valve Seat
O
O
O
O
O
O
O
O
Lap the Valve Seat.
See “Valve Face and Valve Seat”
Intake/Exhaust Valve Seizure
O
O
O
O
O
O
O
O
O
O
O
Correct or Replace Intake/
Exhaust Valve.
Cylinder Head Gasket Blowout
O
O
O
Replace the Gasket.
Seized or Broken Piston Ring
O
O
O
O
O
O
O
O
O
O
O
O
Replace the Piston Ring.
Worn Piston Ring, Piston or Cylinder
O
O
O
O
O
O
O
Perform Honing and Use Oversize
Parts.
Seized Crankpin Metal or Bearing
O
O
O
O
O
O
O
Repair or Replace.
See “Inspection of Crankshaft and
Improper Arrangement of Piston Ring
Gaps
O
O
O
O
Correct the Ring Joint Positions.
See “Reassembly of Pistons” on
TNV_IDI_ServiceManual_A4.book 7 ページ ２０１２年２月２４日 金曜日 午前１０時２４分
