kdhconst
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Posts posted by kdhconst
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Changed the cam . He also checked the bearings on the crank.
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Well after 2 months of off and on work on the cam the shop owner called and said come and get it. I live about 18 miles from the shop. before I got half way home it was popping through the breather. A excust valve was not opening. Called the shop. said he would come and tow it to his shop the next day. He showed up 2 days later and said it would be in his shop the next morning. I was told I had to be patient.12 days later I had enough. Called another tow service and had it taken to Mack. They found a broken bolt in a head. They checked Hring height and adjusted valves. All parts were supplied by Mack again .
I have been told by others as heaveyHaulenMack stated that oil may not be getting to it. I was told that a oil journal feeds 1,2 and 3 another journal feeds 4,5,and 6. The journals go up #2 and #5 to feed oil to each. In my not so smart head if #2 isn't getting oil then #1 and 3 wouldn't be getting oil ether. No one has said anything to me about a ceramic upgrade as asked by fjh.
So truck is homeafter 2 months. The shop owner says he put 76 hrs in what he did ???????? Previous shop charged 36 hrs to do the same thing. If it happens again I will put a reman from Mack in it. Thanks for the input guys!
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The work has been done by 4 different shops
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It has metal rollers The last kit I got was all Mack. The roller becomes flat on one side. In each case the # 2 exhaust is the one that fails. I am wondering if the cam bore oil port is plugged. None of the work was done by Mack.. I have been told to be aware of the H ring height. I believe it has something to do with the lifter and above.
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I'm about to put in my 4th cam and lifters. E7 460 2000. Dump truck. What the Heck. 475,000 miles. First one was done - 300,000 miles, then 350,000 miles, 435. miles and now 475,000 miles all done by different shops. Any ideas?
Cam issues
in Engine and Transmission
Posted
Agree Terry