- Compression Pressure Inspection

If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.

Warm up and stop engine.

Allow the engine to warm up to normal operating temperature.

Check cylinder compression pressure.

While cranking the engine, measure the compression pressure.

Repeat steps (1) through (3) for each cylinder.

Compression pressure :

1,275 kPa (13.0 kgf/cm², 185 psi)

Minimum pressure :

1,128 kPa (11.5 kgf/cm², 164 psi)

Difference between each cylinder :

100 kPa (1.0 kgf/cm², 15 psi) or less

If the cylinder compression in 1 or more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (1) through (3) for cylinders with low compression.
- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
- If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage past the gasket.

Some DTCs may exist after the inspection test and may need to be manually cleared with GDS.

Compression Check