一台EQ1090型汽车发动机大修后试车时以中低速运转不久,气门脚响声由小逐渐变大。停车重调气门间隙时,发现有几根气门推杆出现不同程度的弯曲。更换推杆并调整气门间隙后重新起动发动机,故障依旧;当发动机从低速向中、高速过渡时,化油器突然回火,并出现异响。立即停车检查,发现第1缸进气门杆自锁片环槽处断裂,已更换的推杆又弯曲了。该发动机上12只气门是新的,已弯曲推杆 An EQ1090-type car engine overhaul test run at low speed soon, the valve foot sound from small gradually become larger. Park recalled valve clearance, found that there are several different degrees of valve stem bending. Replace the putter and adjust the valve clearance to restart the engine, the fault still; when the engine from low speed to medium and high speed transition, the carburetor suddenly tempering, and abnormal sound. Immediately check the parking and found that the first cylinder intake valve rod from the locking ring groove Department rupture, the replacement putter has bent. The 12 valves on the engine are new and have bent the putter