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Think your block passages are pristine ? If you haven't had it hot tanked yet, knock out one of the core plugs and tell us what horrors you see !!



I have to agree with this.



I don't know what i have to say for you guys to stop with the dirt in the motor, it's a <10000mi build that was hot tanked, cleaned by a rep machine shop. Plus the rad is new and a 3 core i just looked at it with the fluid drained; which by the way looks like it's new out of the bottle. IT'S NOT THE RAD/BLOCK, 110%. I would consider a blown head gasket before i suspect a good motor build/new rad for crud.