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Message: <blockquote data-quote="FishFreak" data-source="post: 2097143" data-attributes="member: 65712">As pcs said, the leakdown test will let you see where your leakage is coming from, rings, coolant, intake or exhaust valve, so by elimination, if the rings aren't blowing by worse in those two cylinders, then it's from the valve train. You said you did a compression test - what were those two holes like vs the rest of them? I'm guessing you also took pics with the borescope? If you did, what did those piston crowns look like? Any signs of ring wash?Can you explain how you serviced the 'purge canister'? Did you replace it? This is for my own info for my 2 years new to me 2014, now with 140k miles, idles and runs fantastic, knock on wood, and I'd like to service everything like you did.</blockquote>