What is the method for adjusting engine valves?
2 Answers
Engine valve adjustment methods are: 1. Cylinder-by-cylinder adjustment method - First loosen the adjustment screw, use a screwdriver to turn the screw shaft, determine the correct adjustment position, then tighten the screw to adjust both intake and exhaust valve clearances; 2. Two-step adjustment method - While turning the adjustment screw, insert a feeler gauge between the valve stem end and rocker arm, pulling it back and forth until slight resistance is felt. The throttle valve is a controllable valve that regulates air intake into the engine. After entering the intake pipe, the air mixes with gasoline to form a combustible mixture for combustion and power generation. The throttle valve connects to the air cleaner at the top and the engine block at the bottom, serving as the "throat" of the automobile engine.
Adjusting engine valves is a task I mastered back in my mechanic days—precision is key. Start by finding a quiet spot and letting the engine cool before removing the cover. Measure valve clearance with a feeler gauge, adhering to the manual’s specs (e.g., 0.2mm for some engines). Use a wrench or specialty tool to tweak the valve screw, then recheck clearance meticulously—one perfect adjustment avoids loose valves (causing rattling) or overtightening (which burns seats). After each tweak, test-drive briefly to detect abnormal noises or stuttering, ensuring smooth power delivery. Always clean engine surfaces to prevent debris ingress—critical for avoiding bigger issues. Regular maintenance boosts fuel efficiency and longevity, especially for older cars: frequent valve checks preserve sealing and combustion efficiency, guaranteeing worry-free drives.
