Compression Check: Testing and Inspection

INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Remove the No. 1 engine cover.
(c) Remove the 4 ignition coils.
(d) Remove the 4 spark plugs.
(e) Disconnect the 4 fuel injector connectors.





(f) Set SST and a compression gauge.
SST 09992-00500
(g) Insert the compression gauge into the spark plug hole.
(h) While cranking the engine, measure the compression pressure.
Standard compression pressure: 1,300 kPa (13.3 kgf/cm2, 189 psi)
Minimum pressure: 1,000 kPa (10.2 kgf/cm2, 145 psi)
Standard difference between each cylinder: 100 kPa (1.0 kgf/cm2, 14 psi)

NOTICE:
^ Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
^ Check the other cylinders' compression pressures in the same way.
^ This measurement must be done as quickly as possible.

If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect again.

HINT:
^ If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
^ If pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the gasket.