Toyota
Toyota Land Cruiser
 Service Manual
Engine Mechanical
Compression

INSPECTION

HINT: If there is a 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 the normal operating temperature.

2. REMOVE SPARK PLUGS ( IG-1 )

3. CHECK CYLINDER COMPRESSION PRESSURE

(a) Insert a compression gauge into the spark plug hole.

(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 the engine speed at 250 rpm or more.

(d) Repeat steps (a) to (c) for each cylinder.

NOTICE: This measurement must be done as quickly as possible.

Compression pressure: 1,324 kPa (13.5 kgf/cm2, 192 psi) or more

Minimum pressure: 981 kPa (10.0 kgf/cm2, 142 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 lower than the specification, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (a) to (c) for the cylinders.

If adding oil helps the compression, chances are that the piston rings and/or cylinder bore are worn or damage.

If the pressure stays low, a valve may be sticking or the seating is improper, or there may be leakage past the gasket.

4. REINSTALL SPARK PLUGS ( IG-1 )

    More about Engine Mechanical:

    CO/HC

    Compression

    Cylinder block

    Disassembly

    Cylinder head

    Inspection

    Installation

    Replacement

    Engine unit

    Idle speed

    Ignition timing

    Timing belt

    Valve clearance

    Toyota Land Cruiser Service Manual / Engine Mechanical / Compression

    Toyota Land Cruiser Service Manual

    Categories


    2011-2018 Copyright www.tlacruiser.com