Compression Check: Testing and Inspection
INSPECT COMPRESSIONa. Warm up and stop the engine.
b. Disconnect the injector connectors.
c. Remove the ignition coils.
d. Remove the spark plugs.
e. Inspect the cylinder compression pressure.
1. Insert a compression gauge into the spark plug hole.
2. Fully open the throttle.
3. While cranking the engine, measure the compression pressure.
SST 09992-00500
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)
NOTICE:
^ Always use a fully charged battery to obtain the engine speed of 250 rpm or more.
^ Check other cylinder's compression pressure in the same way.
^ This measurement must be done as shortly as possible.
4. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again.
HINT:
^ If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
^ If the pressure stays low, a valve may be sticking or seating improperly, or there may be leakage past the gasket.