jcalesan Posted December 1, 2015 Share Posted December 1, 2015 I recently had a 2013 mp8 with 385k miles drop a valve on#6. no over-speed, no signs of driver error. tore up the head, liner and turbo so far. any insight as to why would be helpful. Quote Link to comment https://www.bigmacktrucks.com/topic/42886-mp8-sick-puppy/ Share on other sites More sharing options...
Mackpro Posted December 2, 2015 Share Posted December 2, 2015 Was a valve spring broke? We had a high mile MP-8 that had a ticking sound in the top end. It was a broken valve spring but driver kept on driving it till it dropped a valve. After that we always pull the valve cover and look for broken valve springs when we have a ticking noise in top end. We had a couple of 04 emission MP-7s with broken valve springs and the 09 MP-8 and thats all we have seen here. Quote Link to comment https://www.bigmacktrucks.com/topic/42886-mp8-sick-puppy/#findComment-313888 Share on other sites More sharing options...
jcalesan Posted December 3, 2015 Author Share Posted December 3, 2015 miles were only 385k. and it's in 2013. no broken springs. just can't figure this one out. Quote Link to comment https://www.bigmacktrucks.com/topic/42886-mp8-sick-puppy/#findComment-313942 Share on other sites More sharing options...
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