Kia Optima Manuals

Kia Forte: Compression Pressure Inspection - Engine Mechanical System - Kia Forte TD 2014-2018 Service ManualKia Forte: Compression Pressure Inspection

Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Engine Mechanical System / Compression Pressure Inspection

  
If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure.
1.
Warm up and stop engine.
Allow the engine to warm up to normal operating temperature.
2.
Disconnect the injector connectors (A).
3.
Remove spark plugs.
(Refer to Engine Electrical System - "Spark Plug")
4.
Check cylinder compression pressure.
(1)
Insert a compression gauge into the spark plug hole.
(2)
Fully open the throttle.
(3)
While cranking the engine, measure the compression pressure.
  
Always use a fully charged battery to obtain engine speed of 200 rpm or more.
(4)
Repeat steps (1) through (3) for each cylinder.
  
This measurement must be done in as short a time as possible.
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
(5)
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.
A.
If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
B.
If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage past the gasket.
5.
Install the other parts reverse order of removal.
6.
Some DTCs may exist after the inspection test and may need to be manually cleared with GDS.
Special Service Tools
Tool (Number and name) Illustration Use Crankshaft front oil seal installer 09231-2E000 Installation of the front oil seal Valv ...

Troubleshooting
Symption Suspect area Remedy Engine misfire with abnormal internal lower engine noises • Worn crankshaft bearings ...

See also:

Inspection (With GDS)
1. Check BCM input/output specification of multifunction switch using the GDS. If the specification is abnormal, replace the lamp or wiper switch. ...

Rear Oil Seal Components
1. Rear oil seal ...

Mode Control Actuator Description
The mode control actuator is located at the heater unit. It adjusts the position of the mode door by operating the mode control actuator based on the signal of the A/C control unit. Pressing ...

Categories

Copyright www.kifomanual.com 2014-2026