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Finally broke down and bought an Elite Engineering catch can. After some research, I got over the worries of installing one and warranty issues. For GDI engines I think these are a must have. I would rate my engine as ‘severe duty’ for this application as my commute is very short, 3 miles to a Park & Ride to catch a bus. I live in MN so it’s cold in the winter, most days the engine does not fully warm up. I took pics of the back side of the throttle body, not filthy, but dirtier than I expected. I cleaned it up and plan to do again at every other oil change. The intake was wet with oil/moisture, looks like a lot, but I’d guess it’s about a tablespoon or 2. With the 6.2 the PCV vents on the front side, covienent for cleaning purposes, would expect it to be somewhat cleaner further back in the intake. I did not do a clean side separator as I don’t do WOT much, might regret it later, but intake tubes were clean and dry so should be good there. I re-used the GM PCV connectors, ordered a replacement PCV vent hose in case I need to go back to OEM. Looks sharp and I have an east swap solution. While I was there installed an AirRaid Jr kit, I like the flow better with filter and intake tube. It’s almost worth it to keep the oil change guys from always showing you your ‘dirty air filter’ 😱 Overall easy install and a fun Saturday project. I highly recommend a catch can for any GDI engines, eventually the valves will get dirty and need to be cleaned, I don’t think a catch can will eliminated this, but I think it will makes those cleanings fewer and father bewtween!
I just bought a 2017 GMC SLT with the 6.2L and 8 Spd. It had 8700 miles on it. It will idle a little rough at idle momentarily. I only run premium gas, is that normal for the 6.2L? I've installed a Magnaflow 12909 muffler w/o flapper valve and an AFM Momentum CAI. Also, since I've had it, it has a tick that is heard when your standing next to it, or in a drive thru with the window down. Is that normal? After reading on here I'm worried about the afm lifters causing it. I plan on getting a Hypertec programmer so I can change the afm to 70mph and adjust the shifting so it's less clunky. I also will be installing an Elite Engineering EX-2 catch can kit. Will these additions help with the common afm issues? To make it more reliable in the long run? Anyone with experience or knowledge please educate me on this, thank you
Just got a new 2018 Sierra with more bells and whistles than I've ever seen in a truck before. Sure learning a lot on these forums.
The catch can thing has my interest, I never even knew that was a problem, never had a direct injection vehicle before.
I'm looking under the hood on this thing and although it is difficult to see much it looks like there are two PCV valves, assuming that's what I think I'm seeing. They are right up front of the engine, one each side, with short tubes going into the intake air plenum. See attached photo of the front left side of the engine.
So question #1, are two PCVs what I am seeing?
Question #2, if so then I need either two catch cans, or one that does double duty, right?
I'm a little confident that the answers to my questions will be yes (still appreciate confirmation though) and if so this will be a plumbing nightmare. This truck has the eAssist which means the only open space for a can is the front left corner where the battery used to be, on eAssist it's up in the back right corner of the engine bay. And, there is no room at all left in that part of the engine bay, it is packed.
So I guess question #3 is, anyone come up with a creative way of solving this problem, besides hoses all across the top of the engine?
Thanks in advance for responses.
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