How to Adjust the Valve Clearance of Modern Rena

Modern Rena valve clearance is 0. 17-0.23mm for intake valve and 0.22-0.28mm for exhaust valve. The purpose of setting the valve clearance is to ensure the normal operation of the valve mechanism of internal combustion engine. Because the valve train works at high speed and the temperature is high, the valve tappet, valve stem and other parts will automatically push open the valve when heated, which makes the valve and valve seat not tightly closed and causes weather leakage. The following is the related content of valve clearance: 1. The side valve has the simplest structure. Because the anti-knock performance and high-speed performance of the engine after adopting this valve form are poor, it is only used for engines with low compression ratio and low speed; 2. The overhead camshaft valve is the most ideal in performance, can meet the requirements of high-speed and high-compression ratio high-power vehicles, and has good economy, so it has been widely used; 3. The structure of the bottom valve is complicated. At present, due to production habits, it is only used in the United States, Italy, the former West Germany and other countries.