To check the compression, it is recommended to use compression testers for gasoline engines of the G-324 type by Triscko Taiwan or KA – 6721K by KT TOOLS Taiwan
Place the car on a horizontal platform, apply the parking brake and warm up the engine
Set the gearbox lever to neutral, turn off the ignition and open the hood.
Disconnect the plug connector from the module or ignition coil.
Remove the wires from the spark plugs and unscrew spark plugs
Perform compression measurements together, turn on the starter with the ignition switch.
Check the compression in the first cylinder.
Check with the air and throttle valves fully open
Insert the rubber cone of the compression gauge tip into the threaded hole for the spark plug in the cylinder head and press to ensure the combustion chamber is sealed.
Turn the ignition switch on and turn the engine crankshaft until the readings stabilize. arrows of the compression gauge (from 5 to 7 seconds).
Set the arrow of the compression gauge to zero by pressing the reset button.
Similarly, check the compression in the second, third and fourth cylinders.
Compression in all engine cylinders should be at least 1.0 MPa (10 kgf/cm 2) and should not differ in different cylinders of the same engine by more than 0.1 MPa (1 kgf/cm 2).
If the compression reading is low in one or more cylinders, perform a troubleshooting.
Pour 20 to 25 cm 3 of clean engine oil into the cylinder with low compression.
Repeat the compression measurement operations. A higher compression reading in this case indicates a breakage or sticking of the piston rings.
If the compression gauge reading does not change, then the cause of the low pressure is a loose valve fit or a damaged cylinder head gasket.
Screw in the spark plugs and connect the high-voltage wires to them.
Close the hood, start the engine and check its operation.