Toyota Camry Manual page 2002

ENGINE MECHANICAL (5S–FE)
COMPRESSION
INSPECTION
HINT:
If there is lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1.
Allow the engine to warm up to normal operating temperature.
2.
3.
4.
Compression
(a)
Gauge
(b)
(c)
HINT:
Always use a fully charged battery to obtain engine speed of
250 rpm or more.
(d)
S05312
NOTICE:
This measurement must be done in as short a time as pos-
sible.
(e)
5.
6.
– COMPRESSION
WARM UP AND STOP ENGINE
DISCONNECT IGNITION COIL CONNECTORS
REMOVE SPARK PLUGS (See page IG–1)
INSPECT CYLINDER COMPRESSION PRESSURE
Insert a compression gauge into the spark plug hole.
Fully open the throttle.
While cranking the engine, measure the compression
pressure.
Repeat steps (a) through (c) for each cylinder.
Compression pressure:
1,226 kPa (12.5 kgf/cm
Minimum pressure: 981 kPa (10.0 kgf/cm
Difference between each cylinder:
2
98 kPa (1.0 kgf/cm , 14 psi) or less
If the cylinder compression in one or more cylinders is low,
pour a small amount of engine oil into the cylinder through
the spark plug hole and repeat steps (a) through (c) for
cylinders with low compression.
If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are worn or
damaged.
If pressure stays low, a valve may be sticking or
seating is improper, or there may be leakage past
the gasket.
REINSTALL SPARK PLUGS (See page IG–1)
RECONNECT IGNITION COIL CONNECTORS
Author :
2
, 178 psi) or more
2
, 142 psi)
Date :
EM–3
EM07Y–05
1175