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Just finished a rebuild on my 396 in my 69 Camaro. Less than 2 hours of run time and I had a knock in the engine. Looked like a couple of collapsed lifters. Took the intake off and this is what I found. Brand new summit cam with lifters. Fried the cam and destroyed my main bearings. 7 of the 16 lifters were bad. All I get told is that I didn’t break it in right. Told that EOS and zinc additive doesn’t work anymore. Thoughts? View attachment 293912
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That’s very no bueno. I have no idea of your engine building knowledge, so I’m curious what assembly lube you used for the cam, if you used a primer pump to verify oil all the way to the rocker arms, and what your break in procedure was.
 
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