where or how do I obtain Vented oil filler cap for 2013 equinox 2.4?
You have several choices when it comes to reducing crankcase pressure in your 2.4 liter ecotec LEA engine....
... to reduce the chance of crankshaft rear main seal failure
And improve the life of your engine
Google.....
1
The Ac delco Fc219 oil cap.
If you try to blow through it, when it is new and no oil on it, you will not be able to blow through it, which means that the cracking pressure will be between 1.5 and 2.5 psi.
This oil cap allows air out of crankcase and not in and costs the least.
It should prevent rear main seal failure under cold conditions,
And it will probably will not vent under idle since cracking pressure is greater then 1 psi , and crankcase pressure at idle is less then 1 psi.
2
The c-f-m performance valve cover breather
See post 19.
https://www.equinoxforum.net/31-engine-drivetrain/26053-2-4l-piston-ring-replacement-progress-2.html
Allows air out of engine at a very low psi of about 0.1 psi
Or 0.2 psi or 0.05 psi, who knows?
And it does not let air into crankcase.
It vents even when my Equinox is at idle, when the intake manifold is pulling a 9 psi or 10 psi vacuum, as measured with a scan tool. While getting crankcase gasses out of crankcase is good,
a risk of venting at idle would be that if your fresh cabin air intake, which is outside of your engine
at base of wipers, is covered wth snow and ice, you might suck in and smell "crankcase oily smell" into your passenger compartment.
There is a gasket that seals between fresh air intake and the engine compartment, but if that gasket is damaged or missing, then crankcase smell might get into passenger compartment.
1 case has been reported in these forums of crankcase smell getting into passenger compartment, but no details are known if snow covered wiper area.
As a precaution, as a test, even though I have no such smell on my 3 equinox's in a 1 year time frame,
I added a radiator hose to duct the escaping air from the cfm oil cap to the ground, as a precaution. This radiator hose is a perfect fit for my equinox's.
https://shop.advanceautoparts.com/p..._content=404718&c3ch=Affiliate&c3nid=IR-27795
3
A third option would be
"Billet Aluminum Valve Cover Oil Cap w/Breather Air Filter Fit For LSX"
and purchase a 1/2 inch ID hose, ( the breather air filter is removed and replaced with 1/2 inch hose, and use the provided hose clamp to attach 1/2 inch hose to billet.)
This idea (like the cfm idea) was presented by adidas in these forums. See his post 56 for pictures,.....
https://www.equinoxforum.net/9-terr...778-frozen-pcv-rear-main-seal-blow-out-6.html
The 1/2 inch hose was added to duct crankcase fumes away, to the ground, as a response to the 1 reported case of crankcase smell in passenger compartment, as described above.
This "billet" does not have a check valve, so air can be sucked into crankcase when the crankcase is in a vacuum state.
On a normal engine, this billet would not be good for fuel trims, that is, UN metered air flowing in through this oil cap, then thru the dirty side PCV, and then into combustion chambers, would throw off fuel trims on a normal engine.
But, this is not a normal engine.
As I said above, even at idle, when intake manifold vacuum is 10 psi, I feel crankcase pressure exhausting through the cfm oil cap.
However, i have also once seen, intake manifold vacuum at idle, on my newer 2016 Equinox with 19k miles, after a 1 hour 65 mph highway run, then afterwards at idle I measured a 10.7 psi intake manifold vacuum, and the crankcase was in vacuum also, the check valve on my cfm oil cap was sealed shut, that is, it was not venting.
Also, often when decelerating, intake manifold vacuum does exceed 10.7 psi vacuum, I have seen intake manifold vacuums of 11.7 psi while decelerating.
My point is your CRANKCASE will suck in extra air into crankcase through this oil cap, under certain conditions like decelerating
BUT
that does not mean that excessive air enters the intake manifold through the dirty side PCV,
that is,
on this poorly designed "internal to the engine, dirty side PCV orifice" even if air enters through the oil cap into crankcase does not mean that
It will impact fuel trims.
In fact,
addidas has said he has not seen any adverse variation of his fuel trims when using this "Billet Aluminum Valve Cover Oil Cap w/Breather"
4
A fourth choice for a vented oil cap would be jayTees home made checkvalve, that he proposed in fall of 2018 in these forums, as a method to prevent rear main seal failure.