How do you do a valves leak down test on hyundia accent 08?

You bring the cylinder to be tested to TDC and connect the test guage. You apply the pressure and see if it holds. If it does not, you listen for air in the intake to see if the intake valves are bad, the exhaust to see if the exhaust valve is bad, the dip stick tube to see if the rings are bad and you look at the coolant in the radiator to check for bubbles to see if the head is bad or has a gasket leak.