Checking Compression Pressure - Hyundai Tiburon 2003 Workshop Manual

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Coolant temperature ° C (° F) and specific gravity

The safe operating temperature is -15° C (5° F) when the measured specific gravity is 1.058 at coolant temperature of 20°C

• If the concentration of the coolant is below 30%, its anti-corrosion property will be adversely affected.

• If the concentration is above 60%, the engine cooling property will decrease, affecting the engine adversely. For

these reasons, be sure to maintainthe concentration level within the specified range.

• Do not mix types of anti - freeze.

RECOMMENDED COOLANT

ETHYLENE GLYCOL BASE FOR ALUMINUM

CHECKING COMPRESSION PRESSURE

1. Before checking the engine compression, check the engine oil level. Also check that the starter motor and battery are all in

normal operatingcondition.

2. Start the engine and wait until the engine coolant temperature reaches 80 ~ 95° C (176 ~ 205° F).

3. Stop the engine and disconnect the spark plug cables.

4. Remove the spark plugs.

5. Crank the engine to remove any foreign material in the cylinders.

6. Insert the compression gauge into the spark plug hole.

7. Depress the accelerator pedal to open the throttle fully.

8. Crank the engine and read the gauge.

Standard value : 1,200kpa (12.2 kg/cm² , 170psi)

Limit : 1,050kpa (10.7kg/cm² , 149psi)

9. Repeat steps 6 to 8 for all cylinders, making sure that the pressure difference for each of the cylinders is within the

specified limit.

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Mixture ratio of antifreeze in coolant

50% [Except tropical areas]

40% [Tropical areas]

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concentration

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