GM Service Bulletin 14882 - Blocked PCV valve causing Rear Main Seal failure - Page 7 - TerrainForum.net: GMC Terrain Forum
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post #61 of 68 (permalink) Old 03-30-2019, 07:28 AM
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Originally Posted by mapmaker View Post
That as my dealer and other mechanics said, It is the same vehicle, same engine same problem as the ones covered by the special coverage. Also that GM knew about this problem a long time ago and should have told me and fixed it while my vehicle was still under warranty and before the problem occurred.

Best of luck on your venture.

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post #62 of 68 (permalink) Old 04-20-2019, 08:37 AM
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Originally Posted by rednox301 View Post
Looks like we have conflicting information here.
Click on the link in post #53 and scroll down to "Vehicle Fitment"
This web page says it will fit the 2.4L
I see on Rockauto they do list that part on the 3.6 but I can't find it for the 2.4.
When I was shopping for a CPO Nox last December, I looked at a 2.4 and there was a film of oil all over the engine compartment and remnants of a pool of oil on the valve cover. I Went with the 3.6 after I saw all that oil on a vehicle with less than 20,000 miles on it.
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post #63 of 68 (permalink) Old 04-28-2019, 08:31 AM
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I would seem that all of us could take a snippet from the GM TSB. One of the things it tells the tech to do is test for positive or negative air pressure at the clean side PCV orifice on top the valve cover as a way of determining if the internal PCV is clogged. Take the hose off the valve cover port, start the motor, rev to around 1500 RPM and see if it will hold a small sheet of paper up to the orifice. If so, then the PCV system internally is operating normally. If it won't hold it or pushes away, then the internal PCV is getting clogged or is already fully clogged.

A very simple test that could make someone aware of a problem before it becomes a $4000+ problem. Those that are not so inclined to do this sort of thing, if they take their vehicle into the dealer for oil changes, ask the tech to test the valve cover port for proper PCV flow according to the TSB. Would take only 15 min shop time to do.

Seems this is the only preventive measure available short of tearing things apart regularly and checking the internal orifice directly.

Also, the warranty extension I have seen on this particular issue does not lay out VIN numbers, but years of 2010-2013.... 2010-2014 on the Nox. And the warranty for this issue is extended for 10 years / 120,000 miles. So.... it would seem even a 1L law student could get a resolve on this one.

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Last edited by Copperhead; 04-28-2019 at 08:47 AM.
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post #64 of 68 (permalink) Old 04-28-2019, 09:10 AM
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Besides routine cleaning of the PCV orifice every 30K to 40K miles . . .

One other preventative measure is to install a vented Oil Filler Cap.
There is the after market one from CFM as well as a GM vented cap.
Using one of these will prevent prevent crankcase pressure from blowing out the engine main seal on 2.4L engines.
The GM Vented Oil Filler cap that is recommended by GM Tech Bulletin on other vehicles can also be used on Equinox/Terrain. Owners on the truck and Camaro forums have installed them.

There is no practical way to do an "air flow" check on the PCV path during the uncertain conditions when the PCV orifice may suddenly freeze up in cold weather. A crankcase pressure sensor would be a great preventative measure.

https://www.gm-trucks.com/forums/top...tech-bulletin/


https://www.c-f-m.com/performancepar...c-766p6443.htm





https://www.carid.com/acdelco/gm-ori...mpn-fc219.html






" -So, there's a tech bulletin out that advises that when it gets really cold, I mean, cold cold, there is a tendency for the PCV system to freeze up and cause high crankcase pressure that blows oil out of seals, etc. The solution is to put on a vented cap, FC219, to allow the pressure to vent if necessary. It's a cap that has a coil spring pressure relief valve to vent if it gets above a set point. "

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Last edited by JayTee2014; 04-28-2019 at 09:18 AM.
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post #65 of 68 (permalink) Old 04-28-2019, 11:10 AM
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As I responded in the other thread, I would prefer to use the Elite Engineering clean side cap replacement option. I get far too much dust and dirt in my engine compartments to risk using a breather like that one. The EE cap maintains the closed system and just replaces the stock PCV hose from intake to air intake plenum. Filters out crud that comes thru the line as opposed to the stock system which just allows that stuff to go the intake and add to the mess in the intake manifold.

http://www.eliteengineeringusa.com/c...oil-separator/

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post #66 of 68 (permalink) Old 04-28-2019, 11:12 AM
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The CFM cap has a ball check valve and the GM cap also has a preset pressure valve. No dust or debris can enter either.

Also, there will be not mess going into the air plenum or intake if the PCV orifice is not clogged. Another member verified this with the very same Elite product.


Just showing what is available to other members and readers.

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post #67 of 68 (permalink) Old 07-31-2019, 07:15 PM
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Originally Posted by JayTee2014 View Post
The CFM cap has a ball check valve and the GM cap also has a preset pressure valve. No dust or debris can enter either.

Also, there will be not mess going into the air plenum or intake if the PCV orifice is not clogged. Another member verified this with the very same Elite product.


Just showing what is available to other members and readers.
JayTee....So, the GM Vented filter cap is considerably cheaper than the CFM unit. Would it suffice just as well or is there a particular reason to go with the more complex CFM model? Also, do you happen to know, following the link you gave for the GM filter cap, if it would fit a 2013 Terrain? The website says no, but I find that difficult to believe. Thank you for your expertise!
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post #68 of 68 (permalink) Old 08-04-2019, 12:51 PM
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Originally Posted by dumbo View Post
JayTee....So, the GM Vented filter cap is considerably cheaper than the CFM unit. Would it suffice just as well or is there a particular reason to go with the more complex CFM model? Also, do you happen to know, following the link you gave for the GM filter cap, if it would fit a 2013 Terrain? The website says no, but I find that difficult to believe. Thank you for your expertise!

The GM cap is probably best since it is a recommended fix on other GM vehicles. Ans, if you buy it on Amazon and fit is incorrect, you can always send it back.


Sorry for the delay. We were on vacation for awhile.

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SOLD - - 2015 Equinox LTZ 3.6L FWD Champagne Silver Metallic *Build Date 1-08-2015 *

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