I was expetiong to find ahole in piston, whitch wouold have been an easy fix. what i've found, is less convinet, it's carnage fixable but carnage. valve spring, spring retainer or lifter fail
can't complain tho engine was expected to go bang at some point tbh as it was built to evaluate new parts, and some from supplyers we've not used before.
stage 1 testing complete - they have been found lacking.
stage 2 testing begins - the warranty