About 10 years after the introduction of GMC's new inline six cylinder engine in 1939, General Motors issued a 'Product Service Bulletin' in regards to a recommended improvement on the 228, 248, and 270. It appears the manufacturer discovered a weakness that shortened the life of the engine timing gears. This recommendation was made for enlarging the oil supply hole leading to the meeting point of the two gears. The attached dealer bulletin was issued January 31, 1949.
This is especially interesting considering over a million GMC trucks with these engines had been built prior to this. The number includes the five years of military large trucks that were used during WWII under very abusive off road conditions!
에그슬롯
Chen Tong은 얼굴을 붉히며 한동안 무슨 말을 해야 할지 몰랐습니다.
Tang Yin은 고개를 들었습니다. "학생의 아내도 학생과 나쁜 관계를 가지고 있습니다."