Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Tundra 2000-2006 Approved 04-06 techinfo.toyota.com ileaf 06toyrm 06toypdf 06rmsrc 06tundra em2uzfe compr insp

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                                                                                             EM-3
              ENGINE MECHANICAL (2UZ-FE)   -   COMPRESSION


                                  COMPRESSION                                                EM0KR-11


                                  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 SPARK PLUGS (See page IG-1)

                                  3.    CHECK CYLINDER COMPRESSION PRESSURE
Compression                       (a)   Insert a compression gauge into the spark plug hole.
Gauge
                                  (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.
                         A04458   (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:
                                        1,373 kPa (14.0 kgf/cm2, 199 psi) or more
                                        Minimum pressure:
                                        1,030 kPa (10.5 kgf/cm2, 149 psi)
                                        Difference between each cylinder:
                                        98 kPa (1.0 kgf/cm2, 14 psi) or less
                                  (e) If the cylinder compression in one or more cylinders is low,
                                        pour 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, chances are
                                              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.
                                  4.    REINSTALL SPARK PLUGS (See page IG-1)

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