worn ms4 cam
02-24-2012, 08:59 AM
#41
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if comp does the regrind they will heat treat again......i am with texas on this, oil may be one of the largest contributing factors in cam failure. sabastian, i can say you definitely had a bad or non-heated treated core to damage that many lobes. i would send it in for a regrind and let it ride......$.02
it was an easy reason to put more performance parts on the car lol.... 
02-24-2012, 10:38 AM
#42
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looks to me as the lifter either spun in its tray or it just failed period. If it was the cam almost all of the lobes would be falling apart. Ive seen a cam about 3 years ago that looked almost identical but about 8 lobes were destroyed from re-using high milage lifter treys allowing the lifters to spin.
02-26-2012, 05:40 AM
#45
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Its clear that the lifter failed. I would think if it was something to do with the cam itself then all the lobs would look the same. Possibly could have been dirt in the oil passage that feeds that lifter and it just got hot and locked up. Other things to look at would leave me to question if the lifter trays had been drilled for faster drainage since I have been curious myself if that has led to any problems for people that have done it. There is always a reason for failure and if you dont figure out where the problem started then it could possibly happen again later. Just my .02
02-26-2012, 01:23 PM
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^^^I hear you, the engine was stock other then the cam, springs and pushrods. I wanted to go as far as I could with out removing the stock heads, and on the stock suspension. So now its game on, I am going to build a turbo kit for the 4.8l I pulled from my silverado and see how far I can push it......but I am going to miss that sound.
