What is the method for testing cylinder compression pressure?

[AutumnLee]

Testing cylinder compression pressure can be done through the following methods: 1. Using a cylinder pressure gauge; 2. Using a cylinder pressure tester. Below are the detailed steps for testing with a cylinder pressure gauge: 1. Start the engine and let it run until the coolant temperature reaches approximately 80°C, then stop; 2. Use compressed air to clean dust around the spark plugs, remove all spark plugs, and open the throttle and choke; 3. Clear exhaust gases from the cylinder, place the rubber tip of the pressure gauge on the first cylinder's spark plug hole, and press firmly; 4. Rapidly crank the engine using the starter or hand crank at about 180 rpm, record the pressure gauge reading, repeat the test 2-3 times, then proceed to measure the remaining cylinders in sequence; 5. If cylinder pressure is below standard, add 20-30g of fresh engine oil to the piston top and retest. If pressure increases significantly, it indicates piston ring wear. If pressure remains unchanged, it suggests valve or gasket leakage.