Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Compression Check
- Warm up engine to normal operating temperature.
- Stop engine after warm-up.
- For CVT model, place select lever in "P" and apply parking brake.
For M/T model, place gear shift lever in "Neutral" and apply parking brake.
- Remove engine cover.
- Remove all ignition coils and spark plugs ,see SPARK PLUG REMOVAL AND INSTALLATION .
- Disconnect all fuel injector connectors.
- Connect special tools together and install then into spark plug hole.
Special Tool
- 09915-64512
- 09915-64530
- 09915-67010
- Depress accelerator pedal all the way to fully open throttle.NOTE: For M/T model, disengage clutch to lighten starting load on engine, and depress accelerator pedal all the way to fully open throttle.
- Crank engine with fully charged battery, and read the highest pressure on compression gauge.NOTE:
- For measuring compression pressure, crank engine up to at least 200 rpm with fully charged battery.
- Check resting position of special tool if measured compression pressure is lower than the limit.
- If the measured compression pressure of particular cylinder is lower than the limit, add a bit of engine oil into the cylinder through the spark plug hole, and then repeat the compression check.
- If the compression pressure increases after adding engine oil, the following may be the cause:
- Pressure leakage due to worn piston rings or worn cylinder
- If the compression pressure does not increase, one of the following may be the causes:
- Incorrect valve timing
- Pressure leakage from the valve or valve seats
- Pressure leakage from the cylinder head gasket
- If the compression pressure increases after adding engine oil, the following may be the cause:
Compression pressure
Standard: 1,400 kPa (14.3 kgf/cm 2 , 203 psi)
Limit: 1,100 kPa (11.2 kgf/cm 2 , 160 psi)
Max. difference between any two cylinders: 100 kPa (1.0 kgf/cm 2 , 14.5 psi)
- Carry out Steps 7) through 9) on each cylinder.
- Install spark plugs and ignition coil assemblies, see SPARK PLUG REMOVAL AND INSTALLATION .
- Connect fuel injector connectors.
- Install engine cover.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.