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06 cat c7
Posted to HD/Fleet Forum on 10/27/2016 16 Replies

we have this freightliner with a c7 cat. it has been to other shops for blowing out the O-ring on the back of the head in the oil galley. it has been replaced4 times once with a new plug. when I changed it last I lubed the O-ring before installing. lasted about 3 days 50 miles. has anyone had this happen? where do I go from here?

Daniel Ladner
Quality Car & Truck Repair
Big Rapids, Michigan, USA

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