2.4L Eco-Tec Seal Issue...
Three things I found to help keep the 2.4L Eco's running
1. Flush the engine.....maybe 3-5 times until you stop getting black filters when you inspect it at 50 miles of a flush run.....AND change oil properly.
As the direct-injected engines were promoted as 'less' maintenance, there are in some ways, but more in others.
Too long of oil change intervals, with a high revving engine, that has a tiny little oil filter, is asking for trouble.
You NEED to change your oil at least every 3333 miles, 3x/10K miles. Personally, I bought the special oil filter cap removal socket and replace my filter(5 minutes max) at 2000 miles after an oil change, and then change oil and filter at 3333-miles. The filters by the dozen from Rock auto are less than $5 each, very cheap insurance.
2. Get the GM Pressure-Release oil filter cap with the built-in bypass valve for high pressure.
I believe this was made just for this 2.4L issue.
A bit of insurance just in case you have another issue.
When the pressure in the valve cover gets too high, it will, 'hopefully' release, keeping the seal from blowing.
3. Put in a PVC oil/water separator can. Sold all over amazon and e-bay. Less than $50 and a 2-hour install.
These should be used on any direct injection vehicle!
This can is put between the PVC line from the valve cover and the intake box, usually on the front frame where accessable. I like the smaller design that has the little viewing tube on the side, so you can see how much gunk the can has in it.
This catch-can will separate oil and condensed water out of the crankcase system, but still, allow the vapors to get recirculated and burned as they are designed to do.
These 'cans' have a bottom drain that I drain, and when I change my filter, just empty it into a cup using the drain valve provided, and you'll be amazed at how much stuff comes out. Mostly water mixed with a frosty-malt looking oily goop. Because it is a bottom tank design, it does not plug up in our frigid winters here.
It also keeps the intake stream back to the valves cleaner, keeping the valve stems cleaner.
I inherited this 140K 2.4L Equinox, losing about a quart every 300 miles and it already has the seal replaced.
Now at 183K & following the above schedule, I have yet to replace the seal (added rear main seal saver 3x), now I use 1-ish quarts every 3333 miles, and most of that seems to happen just before the oil change.... I can live with this.
Hope this helps,
Dean