neukm Posted July 15, 2021 Share Posted July 15, 2021 What would be causing excessive valve guide wear on a DTI466 ? Excessive to the point of dropping #2 exhaust valve in less than 1,000 hours. Engine serial number 468 B T2 U422441 My (reputable) machine shop says he typically sees this type of valve guide wear in over 5,000 hours and it has to be an oiling issue. Rocker shaft and tappets check out okay. Oil passage on rear of block which feeds the rocker appears to be fine. Oil passage to rear cam bushing appears to be lined up with oiling slot in cam bushing. Oil pressure is/was very good. thanks for any help, but go easy, just a farmer trying to turn wrenches ? Quote Link to comment Share on other sites More sharing options...
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