Our school bus fleet had 88 engines affected by safety recall g-12523, "replacement of high pressure oil line" despite never having a problem with the high pressure oil hoses before. The dealer responded quickly, but after completing approximately 20 hose changes, several of the ones completed experienced oil leaks at the connection by the head. They paused a few weeks to evaluate the problem before completing the remainder of the fleet by about may 2013. We have experienced nine different bus engines that...
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leaked after completing the recall. Two of these nine hoses leaked a second time after repair. One of these incidents was major resulting with an engine shutdown that required substantial oil clean up on a public road. These oil leaks have resulted in substantial direct costs replacing oil, route scheduling and vehicle downtime. *Tr