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Hello,

I have an 03 R6 which I bought spring of 07 with 10,000 miles, it now has 18,000 miles on it. I have no history as to how it was maintained prior to me buying it.

This spring I decided to try my hand at a tune up, I'm not too mechanical but I bought the Clymers and went to work. My goal was to change the spark plugs and anything else I could get to including the air filter and the coolant. Today I finally got the throttle body off (the last major hurdle in accessing the plugs) and discovered what appears to be small clumps of hardened metal shavings around the valve stem base. I poked at them softly with a chop stick and they seem to be hardened clumps, not soft.

Does anyone have an idea of what might be causing this? I'm concerned since if one of those clumps were to break free, it would fall into the cylinder.

Thanks!!
 

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If your talking about on the intake walls, thats just casting residue. You never get a perfectly clean wall with casts. If you're talking about on the back of your valves, its either carbon build up or just deposits from cheap fuel. Eitherway, it won't hurt your engine because chances are it will never break off. I wouldn't worry about it.
 
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