[73guna]

So I've been working on my sister's 2012 Cruze doing some long overdue maintenance. Struts, shocks, fluids, plugs and everything in between. Oil consumption, leaks and poor fuel economy (10 mpg) is what I'm seeing.
I stumbled upon this thread last week while researching some things for her car.
Tonight I ordered a 3.4 kit, thanks @XtremeRevolution !
I did the three checks, valve cover diaphragm checked okay, intake check valve missing and pcv pipe to turbo check valve good. My concern is the valve cover. The idle didn't change when I covered the hole. The cap to the diaphragm is concaved inward, this normal?
My concern is, since this car appears to have had less than stellar maintenance and no history, should I go ahead and replace the valve cover or is the test I did good enough to verify all is well with the cover?

 

[73guna]

Has anybody tried recently removing the valve cover cap? I don't necessarily believe a random youtube comment, but it also seems to be sold on ebay as well. I got my valve fix kit, so I might experiment and try to save ~$45 before I buy a new valve cover to fix my ripped vacuum regulator diaphragm. Besides this one post, everything else I read suggests it can't be removed. View attachment 296518 View attachment 296519

I recently removed the cap on a spare valve cover I found. It took some effort and the cap was pretty deformed after I got it off. I used a heat gun and was not interested in saving the integrity of the cap as I just wanted to look at the diaphragm condition.