Originally Posted by
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But the chain is making like a "crunching" noise. Not in any one spot, any place. And especially when I push more power into it.
Is this normal when changing chains? Should I just run it for a week or so and see, maybe it just needs to break in a bit.
What you are describing is the classic sound of an unworn chain running on a worn cog. The noise will fade as your chain wears prematurely, but the rate of wear is only going to increase unless you replace the cog. Are you sure your cog only has 500 milles on it? What sort of cog is it? The best thing you can do is replace the cog and keep your drive train lubed and clean and replace the chain when 12 links measure over 12 1/16".