Page 2337 of 3051
NLEM0116
NEM335
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGSR
EM-80
Page 2338 of 3051

Use the table below to help you find the cause of the symptom.
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of the engine.
4. Check the specified noise source.
If necessary, repair or replace these parts.
NVH Troubleshooting Ð Engine NoiseNLEM0116S01
Location of
noiseType of
noiseOperating condition of engine
Source of
noiseCheck itemReference
page Before
warm-
upAfter
warm-
upWhen
start-
ingWhen
idlingWhen
racingWhile
driving
To p o f
engine
Rocket
cover
Cylinder
headTicking or
clickingC A Ð A B Ð Rocker
noiseHydraulic lash adjuster EM-119
Rattle C A Ð A B C Camshaft
bearing
noiseCamshaft journal clear-
ance
Camshaft runoutEM-115
Crankshaft
pulley
Cylinder
block (Side
of engine)
Oil panSlap or
knockÐ A Ð B B Ð Piston pin
noisePiston and piston pin
clearance
Connecting rod bushing
clearanceEM-134,
141
Slap or
rapA Ð Ð B B A Piston slap
noisePiston-to-bore clearance
Piston ring side clearance
Piston ring end gap
Connecting rod bend and
torsionEM-135,
136,
137
Knock A B CB B B Connecting
rod bearing
noiseConnecting rod bushing
clearance (Small end)
Connecting rod bearing
clearance (Big end)EM-140,
141
Knock A B Ð A B C Main bear-
ing noiseMain bearing oil clear-
ance
Crankshaft runoutEM-138
Front of
engine
Timing
chain coverTapping
or tickingAAÐBBBTiming
chain and
chain ten-
sioner noiseTiming chain cracks and
wear
Timing chain tensioner
operationEM-100
Front of
engineSqueak or
fizzingA B Ð B Ð C Other drive
belts (Stick-
ing or slip-
ping)Drive belts deflection EM-86,
ªChecking
Drive Beltsº
CreakingABABABOther drive
belts (Slip-
ping)Idler pulley bearing
operation
Squall
CreakABÐBABWater
pump noiseWater pump operation LC-34,
ªWater
Pump
Inspectionº
A: Closely related B: Related C: Sometimes related Ð: Not related
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGSR
Commercial Service Tools (Cont'd)
EM-81
Page 2339 of 3051
Removal and InstallationNLEM0117
NEM351
1. Oil filler cap
2. Rocker cover
3. PCV valve
4. Distributor
5. Intake manifold supports6. Knock sensor
7. Oil filter
8. Oil filter bracket
9. Water inlet
10. Thermostat housing11. Water pipe assembly
12. Thermostat
13. Starter motor
14. Power steering oil pump adjusting
bar
15. Power steering oil pump bracket
OUTER COMPONENT PARTSSR
Removal and Installation
EM-82
Page 2340 of 3051
NEM378
OUTER COMPONENT PARTSSR
Removal and Installation (Cont'd)
EM-83
Page 2341 of 3051
SEM019G
1. Oil level gauge
2. Generator adjusting bar
3. A/C compressor bracket4. Alternator bracket
5. Water outlet
6. Cylinder block drain plug7. Exhaust manifold (With three way
catalyst)
8. Exhaust manifold cover
9. Heated oxygen sensor
OUTER COMPONENT PARTSSR
Removal and Installation (Cont'd)
EM-84
Page 2342 of 3051

NLEM0118
1. Warm up engine.
2. Turn ignition switch OFF.
3. Release fuel pressure.
Refer to EC-578, ªFuel Pressure Releaseº.
4. Remove all spark plugs.
5. Disconnect distributor coil connector.
SEM973E
SEM387C
6. Attach a compression tester to No. 1 cylinder.
7. Depress accelerator pedal fully to keep throttle valve wide
open.
8. Crank engine and record highest gauge indication.
9. Repeat the measurement on each cylinder.
+Always use a fully-charged battery to obtain specified
engine speed.
Compression pressure: kPa (kg/cm
2, psi)/rpm
Standard
1,275 (13.0, 185)/300
Minimum
1,079 (11.0, 156)/300
Difference limit between cylinders
98 (1.0, 14)/300
10. If compression in one or more cylinders is low:
1) Pour a small amount of engine oil into cylinders through spark
plug holes.
2) Retest compression.
+If adding oil helps compression, piston rings may be worn
or damaged. If so, replace piston rings after checking pis-
ton.
+If pressure stays low, a valve may be sticking or seating
improperly. Inspect and repair valve and valve seat. Refer
to SDS, EM-150. If valve or valve seat is damaged
excessively, replace them.
+If compression stays low in two cylinders that are next to
each other:
i)The cylinder head gasket may be leaking, or
ii)Both cylinders may have valve component damage.
Inspect and repair as necessary.
MEASUREMENT OF COMPRESSION PRESSURESR
EM-85
Page 2343 of 3051
CheckingNLEM0119
SMA266C
1. Inspect belt for cracks, fraying, wear and oil. If necessary,
replace.
2. Inspect drive belt deflection or tension at a point on the belt
midway between pulleys.
3. Turn crankshaft two revolutions and re-check drive belt deflec-
tion or tension.
+Inspect drive belt deflection or tension when engine is
cold.
+Adjust if belt deflection exceeds the limit or if belt tension
is not within specifications.
DRIVE BELTSSR
Checking
EM-86
Page 2344 of 3051

Deflection adjustment Unit: mm (in) Tension adjustment* Unit: N (kg, lb)
Used belt
New beltUsed belt
New belt
LimitAfter adjust-
mentLimitAfter adjust-
ment
Alternator12-13
(0.47 - 0.51)8-9
(0.31 - 0.35)7-8
(0.28 - 0.31)264
(26.9, 59.3)493 - 583
(50.3 - 59.5,
110.8 - 131.1)11720 70J00 11720 70J05
603 - 691
(61.5 - 70.5,
135.6 -
155.3)652 - 740
(66.5 - 75.5,
146.6 - 166.4)
Air conditioner
compressor9 (0.35)5.5 - 6.5
(0.217 - 0.256)4.5 - 5.5
(0.177 -
0.217)304
(31.0, 68.3)534 - 623
(54.5 - 63.5,
120.0 - 140.1)11920 9F500 11920 9F505
652 - 740
(66.5 - 75.5,
146.6 -
166.4)838 - 926
(85.5 - 94.5,
188 - 208)
Power steering
oil pump12 (0.47)8-9
(0.31 - 0.35)7-8
(0.28 - 0.31)264
(26.9, 59.3)493 - 583
(50.3 - 59.5,
110.8 - 131.1)603 - 691
(61.5 - 70.5,
135.6 -
155.3)603 - 691
(61.5 - 70.5,
135.6 - 155.3)
Applied push-
ing force98 N (10 kg, 22 lb) Ð
*: If belt tension gauge cannot be installed at check points shown, check drive belt tension at a different location on the belt.
SMA328C
DRIVE BELTSSR
Checking (Cont'd)
EM-87