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    possible sludge in 01 Tundra with 190k

    Hi, I just picked up a 2001 Tundra with 190k. I decided to take a valve cover off to see what it looked like inside and its fairly coked up. Any ideas on how to deal with it? I've always been weary of putting anything in my engines besides oil but if there is something out there that isn't snake...
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