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I just happened to be in the middle of trying to get to the pcv system to clean some holes that I hope are plugged, so I have every thing else off and am about to try to remove intake bolts, should I drain coolant and oil before this? And how many bolts are holding that intake on? I have a "2005" Canyon 3.5 I5 L52 motor. And whats the best way to drain the coolant, lower hose or radiator?
 
I just went thru all of that, and unplugging the hole in the PCV system plate solved my smoke on startup issue. The intake has 9 bolts, and I didn't need to drain the coolant to fix this problem.
 
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