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Originally Posted by mike_d
now that you mention it, i did have a lot of valvetrain noise (for about 3-5 minutes) before the filter change, and now there's none. i just attibuted it to the fact that i put synthetic in this time. maybe it was because i had to fill up the filter first.
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I am talking about valve train clatter that lasts for 1-3 seconds on a normal morning startup, and perhaps 4-6 seconds after installing a new, dry filter with your oil change. If you are getting valve train noise that lasts 3-5 minutes, you should consider removing the valve cover and taking a look at the camshaft, and inspect it for excessive/unusual wear.