that "knock" you hear is the lifters... not rod/main knock...
these engines are bulletproof, that is my opinion, but i beat the living hell out of mine, with 167K miles, and a bad life, still strong.. before i got it, i don't think it ever had an oil change... and had like a gallon of coolant in the crankcase... so i think the engines are built pretty goddamn good
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