james j neiweem Posted October 28, 2008 Share Posted October 28, 2008 Hey current Mack mechanics. Did they ever solve the problems with the early MP8 valve train problems and if so what was the fix. Have a nice Mack day Quote Link to comment https://www.bigmacktrucks.com/topic/4347-mp8s/ Share on other sites More sharing options...
Mackpro Posted October 28, 2008 Share Posted October 28, 2008 Hey current Mack mechanics. Did they ever solve the problems with the early MP8 valve train problems and if so what was the fix. Have a nice Mack day They did come out with some new improved injector rocker arms and this seem to have stopped the breakage problem. When I asked about changing out the older style arms on older trucks I was told that if they were gonna break, they would have done so by now. They have also fixed the injector cup problem by coming up with a better sealing injector washer and a software download. Quote Link to comment https://www.bigmacktrucks.com/topic/4347-mp8s/#findComment-23028 Share on other sites More sharing options...
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