Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm em compr insp
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ENGINE MECHANICAL - COMPRESSION
COMPRESSION EM168-01
INSPECTION
HINT:
If there is lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to normal operating temperature.
2. REMOVE NO. 2 CYLINDER HEAD COVER
3. REMOVE IGNITION COIL (See page IG-6 )
4. REMOVE SPARK PLUGS
5. INSPECT CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) Fully open the throttle.
(c) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain engine speed of
250 rpm or more.
A11217 (d) Repeat steps (a) through (c) for each cylinder.
NOTICE:
This measurement must be done in as short a time as pos-
sible.
Compression pressure:
1,471 kPa (15.0 kgf/cm2, 213 psi)
Minimum pressure:
1,079 kPa (11.0 kgf/cm2, 156 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm2, 14 psi) or less
(e) If the cylinder compression in one 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.
S If adding oil helps the compression, it is likely that
the piston rings and/or cylinder bore are worn or
damaged.
S If pressure stays low, a valve may be sticking or
seating is improper, or there may be leakage past
the gasket.
2002 ECHO (RM884U)
Author : Date : 617
EM-4
ENGINE MECHANICAL - COMPRESSION
6. REINSTALL SPARK PLUGS
7. REINSTALL IGNITION COIL (See page IG-7 )
8. REINSTALL NO. 2 CYLINDER HEAD COVER
2002 ECHO (RM884U)
Author : Date : 618
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