How to adjust the valves of an eight-cylinder engine?
1 Answers
Eight-cylinder engine valve clearance adjustment method is to adjust the valve clearance according to the firing order of 1-5-4-2-6-3-7-8. Additional information is as follows: 1. Function of valves: Specifically responsible for introducing air into the engine and expelling exhaust gases after combustion. In engine structure, they are divided into intake valves and exhaust valves. The intake valve's function is to draw air into the engine to mix with fuel for combustion; the exhaust valve's function is to expel the combusted exhaust gases and dissipate heat. 2. Composition of valves: Valves consist of a valve head and a stem. The valve head operates at very high temperatures (intake valve 570~670K, exhaust valve 1050~1200K) and also withstands gas pressure, valve spring force, and the inertial force of transmission components, with poor lubrication and cooling conditions. Therefore, valves must possess certain strength, stiffness, heat resistance, and wear resistance. Intake valves are generally made of alloy steel (chromium steel, nickel-chromium steel), while exhaust valves are made of heat-resistant alloy (silicon-chromium steel). Sometimes, to save on heat-resistant alloy, the exhaust valve head is made of heat-resistant alloy, and the stem is made of chromium steel, with the two parts then welded together.
