The original manifold cracked. A used exhaust manifold for the X16XEL engine was purchased, from which the oxygen sensor was removed (it took some effort), one broken bolt was drilled out and all the existing threads were cleaned with a tap.
Before installing a new oxygen sensor in a new manifold, watch the video about the sensor • Датчик кислорода для Опель Астра G
#astrag, #engineering!