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E7-350

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E7-350

I recently did an inframe rebuild on a 2000 model E7-350 engine. Oil blows out the breather tube at high RPM's. I used an aftermarket kit with new liners, pistons and rings. We even let the truck run for several hrs at 1700 rpms to try to seat the rings. There is still to much blow-by. Could this by anything besides a piston ring problem?

tracey

tracey

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