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Roller lifter failed at 135k miles 6.1L

3236 Views 4 Replies 2 Participants Last post by  check6x, 
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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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Discussion Starter · #3 ·
This was a factory roller lifter. I live about 30 miles north of Crower and have used many of their cams. In my rebuild I am uusing a regrind of a 6.1 billet cam, the regrind was done by Crower in Temecula. I don't know the family tree, but it is a blood relative of the founder. The lobe with the broken roller was the only one showing damage.
 
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I can't tell which came first.

I am also on a very large Lx forum and this is the first failure of that type.

Rebuilt and running. It was noted when balancing, my rotating assembly was very light.

Now, get some miles on it, get it tuned for a 200 shot and get to the track.
 
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