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ok. I finally have my kl-ze. I'm doing the swap myself and everything is going smooth. I have one question, when changing the valve cover gaskets, I noticed A LOT of dark brown varnish underneath the valve cover of the ZE. I wish I had a picture, but I don't. Sooooo...does anyone know what the normal amount of oil varnish buildup is for about 40k miles, and if it is more than the norm what could this mean e.g. overheating...etc.? Hope this makes sense.