Check for signs of leakage or cracked surfaces at both ends of tube, exhaust manifold and EGR valve.
检查两个管的末端，排气歧管和EGR阀是否有泄露或表面有裂痕。
After the ND4 diesel locomotive made in France only operated about 30,000 km, the cylinder heads of its AGO diesel engine cracked at the bridge of two-valve seats and other places.
由法国进口ND_4型内燃机车上的AGO柴油机气缸盖，仅运用三万公里左右即在气阀座过桥等处产生裂纹，严重影响机车安全运行。
Fastening bolts at valve on gas tower was cracked after used 6 months.
储气塔运行半年即发生了阀门紧固螺栓的断裂事故。
Fastening bolts at valve on gas tower was cracked after used 6 months.
储气塔运行半年即发生了阀门紧固螺栓的断裂事故。
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