How to check H5 gas in Lapras?

Check for air leakage! If there is no air leakage, please check from the air pump! Remove the air pipe of the air pump and block it with your hand to see if it is blocked! Check the mask on the cylinder head of the air pump! Check the drying bottle and the four-way protection valve again, if it can't be blocked! Check the pipes one by one to prevent blockage!

① Adjust the valve clearance. ② Grind the valve or replace it with a new one. ③ Replace the cylinder head and piston appropriately. ④ Replace the valve spring. By detecting the cylinder pressure, we can diagnose the sealing condition of cylinder and piston group, whether the sealing of piston ring, valve and cylinder gasket is good, and whether the valve clearance adjustment is appropriate.