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Roller lifter failed at 135k miles 6.1L

3234 Views 4 Replies 2 Participants Last post by  check6x
The car has ran 4 Silver State races, runs a 100 shot of nitrous at the strip and has demonstrated to a few Mustang owners annd several BMW owners what a poor choice they made in purchasing a car. There was no noise from the engine so I thought I had blow the top ring land. I was about 300 miles from home a limped in, had I known what the failure was I am not sure I would have continued driving.

I had a Crower torque cam, the engine will be rebuilt with a bigger cam and capable of a 200 shot..
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Was this a factory roller lifter or a Crower lifter? I had two Crower solid lift cams, one swiped half the lobes and made me get a Uhaul truck and flatbed to get it the last 300miles home, replacement instantly showed signs of scraping after cam break-in. Crower is about ten miles south of me, I won't buy their cams again, but I have had good luck with them re-grinding stock cams in the past. Sorry to hear about the lifter, but sounds like you have been having fun in the meantime.
 

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Considering 135K miles, which is quite a few for such a new engine, that's a lot of driving. Needless to say, was it pitting of the cam lobe itself that ate the lifter or are you able to tell how the failure actually happened? I had a 3.9 with all the lobes pitted at 150K and the roller lifters showed no damage, so your failure was definitely a rare occurance.
 
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