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This time I will discuss the thin steaming vario at high rpm, the engine oil is always reduced when replacing. Some of the causes of vario are thin blowing at high rpm, piston rings, pistons and liners start to wear out. To be sure, measure the piston ring clearance. Use a fuller gauge to measure the piston ring gap while it is in the liner. The safe size is between 0.20 and 0.30. If it is greater than this number, there will be blowing when installed, even if the piston and liner do not have scratches. The next cause could be from a valve seal that starts hard or cracks occur. In certain cases the cause of bubbling on the motor can also be caused by a loose valve when it is attached to the bosh valve housing (block header). Watch until it's over, hopefully there is knowledge that can be obtained #vario #vario150 #vario125 #vario125 old