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After over a week of breaking hex drivers, I managed to finally pop the PS head off tonight. Funny thing is, I tried a different(much cheaper) hex driver that I bought at an auto parts store this time and it worked just fine. The craftsman 10mm 3/8"Dr. hex driver went for about $10. The Powerbuilt one was about $2, and was obviously built heftier. Anyway, I was noticing something about my engine that puzzled me. The two cylinder heads show different signs on the their exhaust valves. The DS head seems to be a little oily and all valves are dark in color. The PS head seems to be dryer and the exhaust valves are tan in color. Is the tan color normal? VVV-- DS head --VVV
 VVV-- PS head --VVV
 I also noticed some streak marks inside of my cylinder walls. They are not even marks and all of the cylinders are showing these brown marks. Would this be a sign of bad rings?

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