southern truss Posted May 10, 2019 Share Posted May 10, 2019 I'm working on an 87 Mack E6 300hp 4 valve engine and I'm having trouble setting the valves correctly, not sure what the correct procedure is any help would be great, thanks Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/ Share on other sites More sharing options...
fjh Posted May 11, 2019 Share Posted May 11, 2019 What procedure are you currently using???? Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/#findComment-422436 Share on other sites More sharing options...
southern truss Posted May 11, 2019 Author Share Posted May 11, 2019 I tried to set them at what I thought was TDC but when I turned it over the intake valves loosened also I noticed the valve bridges seem loose and I wasn't sure what those are to be set at, then I talked to a friend and he said he thinks there's a weird camshaft in that engine and that I need to follow the proper procedure so I stopped there Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/#findComment-422456 Share on other sites More sharing options...
wilbur Posted May 11, 2019 Share Posted May 11, 2019 Marks should be on the front vibration dampner.. Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/#findComment-422458 Share on other sites More sharing options...
fjh Posted May 11, 2019 Share Posted May 11, 2019 25 minutes ago, wilbur said: Marks should be on the front vibration dampner.. yup should be either on the damper or on fly wheel Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/#findComment-422462 Share on other sites More sharing options...
wilbur Posted May 11, 2019 Share Posted May 11, 2019 8 hours ago, southern truss said: I tried to set them at what I thought was TDC but when I turned it over the intake valves loosened also I noticed the valve bridges seem loose and I wasn't sure what those are to be set at, then I talked to a friend and he said he thinks there's a weird camshaft in that engine and that I need to follow the proper procedure so I stopped there The cam is for a Dynatard , Macks version of a Jake Brake. The big nut on the dynatard adjustment , dont over tighten. It distorts the housing and keeps the piston from working. I forget the torque spec but isnt much. Like #30. I think it took a 1 1/16 or 1 1/8 socket. Quote Link to comment https://www.bigmacktrucks.com/topic/57131-mack-e6-4-valve-valve-bridge-and-lash-adjustment/#findComment-422504 Share on other sites More sharing options...
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