4.
Is engine compression pressure normal?
 | ▶ The valve system, cylinder head & gasket and cylinder block are normal. |
 | ▶ Go to "Wet type compression pressure inspection" procedure as below. |
Operate the vehicle until the engine is at normal operating temperature.
Turn IG key to the OFF position and remove all ignition coils and spark plugs.
Disconnect power supply to injector.
Check cylinder compression pressure.
Insert a compression gauge into the spark plug hole.
Set the throttle plate in the wide-open position.
While cranking the engine, measure the compression pressure.
Repeat steps ⑴ ~ ⑶ for each cylinder.
☞ Always use a fully charged battery to obtain engine speed of 250 rpm or more.
☞ This measurement must be done in as short a time as possible.
■ Specification : At 200~250rpm
Compression pressure | 13.5kg/㎠ |
Minimum pressure | 12.0kg/㎠ |
Difference between each cylinder | 1.0㎏/㎠ |
Is engine compression pressure normal?
| ▶ The valve system, cylinder head & gasket and cylinder block are normal. |
| ▶ Go to "Wet type compression pressure inspection" procedure as below. |
IG key "OFF" and inject engine oil about 10cc to the cylinder.
Measure compression pressure when cylinder is wet.
Is compression pressure increased?
| ▶ Disassemble and repair the cylinder block. |
| ▶ Disassemble and repair the valve system. ☞ If compression pressure is low after wet type compression test, most of faults is head gasket problem. |
