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Message: <blockquote data-quote="mikefromcanada" data-source="post: 31581" data-attributes="member: 12223"><p>Typical storyline, started burning oil. Took out the intake manifold but had a brain fart and drilled the port hole to big. Put it back together, and had the whistling sound when you do that. Replaced the intake manifold with a brand new one. Oil change with Valvoline R+P (first time using it). Vehicle significantly reduced the oil consumption. While doing all the research and education of the issue, many talked about a catch can, in particular on the dirty side. I had ordered one up and finally got around to installing it (about 2 months later). Followed Tico007 (from here) directions. As soon as I turned it on, I started getting the whistling sound again. Pulled the new PCV off the oil cap and it stopped. Seemed like there was tons of vacuum pressure on it. Put it back on, and the whistling came back. Any ideas why the whistling sound again?</p></blockquote><p></p>