Chain rattle at 3K - Do they all do it?
Let me start by saying that I have absolutely no chain rattle at start-up. I know that is a common problem, and there are many past posts on that issue.
My 986S with a 2006 OEM engine (3 chain) has a lot of chain rattle right at 3000 RPM, that only occurs in a narrow window from about 2800 - 3200 RPM. I believe this is where the cam timing advance kicks in.
This is nothing new on my engine. It has been doing this for the 4 years that I have owned it, and quite a few track days. Many oil changes during that time have all been very clean, with only an occasional small plastic spec (chain guides I presume). I am now running without the heavy carpet mat over the engine cover, which makes the noise a bit more prevalent.
Do they all do it? Is there a fix to improve the chain tensioners?
Thanks for any info.
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Kippis
986S
991S
Van Diemen RF97
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