GM 2.4L PCV System Problems Leads To Lawsuit. So What’s Going On?

GM 2.4L PCV System Problems Leads To Lawsuit. So What’s Going On?

If you’re the owner of a General Motors vehicle with the 2.4L Ecotec four-cylinder engine, you may want to pay attention. GM is being sued over an alleged PCV system problem that’s been plaguing these engines for years. According to the recently filed lawsuit, the issue can cause extensive engine damage and lead to costly repairs. So far, GM has yet to issue a recall for the affected vehicles. If you’re impacted by this problem, what can you do? Read on for more information.

Lawsuit Claims PCV System Defect Causes Elevated Crankcase Pressures

The suit alleges that the 2.4L Ecotec engine contains a design defect allowing the PCV (Positive Crankcase Ventilation) system to become clogged by various elements, such as moisture, sludge, grime and ice. As a result, the engine’s crankcase pressure exceeds the engineered threshold of the rear main seal. When this happens, the seal fails and oil begins to find it’s way out of the engine.

As the vehicle continues to be driven, the oil continues to leak outside the engine. The result–dangerously low levels of oil leading to reduced engine power, stalling, and potential engine failure.

Owners have reported hearing a single “pop” noise right before the oil leak started.

What Does the PCV System Do & Why Is It Important?

The PCV system has two jobs, to remove blow-by gases from the crankcase and recirculate them via an intake manifold. If PCV isn’t able do its job, then there can be a build up of excessive pressure leading to oil leaks in your car. Because the crankcase pressures can rise so quickly, even the best gaskets lose their ability to seal the engine.

The PCV system is a crucial component in controlling internal crankcase pressures. When functioning properly, the system will expel the gases from the crankcase faster than the engine produces them. This process keeps crankcase pressures in range, and reduces stress on the seals.

2.4L Ecotec PCV System Unlike Traditional PCV Systems

GM’s 2.4L Ecotec engine uses a unique PCV design, with a fixed orifice vacuum port molded within the intake manifold. Rather than a more traditional design which makes use of a ventilation valve, the Ecotec engine relies on the fixed orifice seated between #2 and #3 intake runners to expel the engine’s gases.

2.4L Ecotec fixed orifice vacuum port between #2 and #3 of the intake runner

However, according to the lawsuit this design leads to the PCV system easily becoming clogged during normal operation. Owners affected by the GM PCV system problems claim there are no early warning signs. In fact, all owners represented in the suit experienced similar symptoms when the PCV system failed. These symptoms include the engine beginning to run noisy and a sudden drop in power. Additionally, some owners claim a check engine and other warning lights illuminated at the event of the PCV system failure.

Owners report that when they are able to safety park the vehicle to check the engine oil, the dipstick would be nearly dry. Often times, the engine would require two to three quarts of oil just to bring levels within a safe operating range.

According to the suit, GM has allegedly known about the 2.4L engine’s PCV system problems when exposed to cold winter weather. In fact, the suit claims GM knew about the design defect as far back as 1985. However, it’s claimed they continued to market and sell vehicles utilizing this PCV system.

Is There A Fix For The GM PCV System Problems?

Currently their is no permanent fix known at this time. However, GM technicians have been instructed per a diagnostics bulletin on how to clear a clogged 2.4L Ecotec PCV system. The service calls for the use of a 1/16 drill bit to be inserted into the PCV orifice in order to clear any debris. The bulletin also instructs the technician to inspect all related PCV hoses and connections for potential damage.

GM technical service bulletin instructs technicians to use drill bit to clear clogged PCV orifice

Owners Forced to Pay Out-Of-Pocket For PCV System Repairs

Owners have had to pay out-of-pocket for the repairs, as their is currently no recall for this defect. Reported costs range from $2,000 to as much as $7,083.89 for repairs. Making matters worst, owners are often told the problem “could” reoccur far down the road despite the cleaning the PCV orifice and new rear seal.

Vehicles Affected

The following GM vehicles are affected by this PCV system defect:

Status of the GM 2.4L Ecotec PCV System Class Action Litigation

Class Action Currently Active

This is an active class action lawsuit. This suit has been brought on behalf of the Plaintiffs and a class of current and former Buick, Chevy or GMC vehicle owners.

Kiriacopoulos et al. v. General Motors LLC. Case No. 2:16-mCase 2:22-cv-10785-SDD-JJCG, was filed in the United States District Court Eastern District of Michigan.

GM 2.4L Ecotec Owner Voices

My 2017 equinox engine died in the middle of the road I’m coming traffic both ways start a backup started making knocking noises no oil light came on…after all this fighting with gm many times they stated that it was due to the pcv system that the rear main seal was out I had to have the car towed because i was out of warranty no one would help me so I have a thirty something $33000 that I couldn’t drive lost both of my jobs due to the 2.4L having the same issues as prior year equinoxes.

While driving on the highway with my child, vehicle suddenly went into reduced power mode. 5 minutes later after exiting the highway, the low oil pressure Alert came on. The vehicle was parked two minutes later then towed home. After towing it to my local certified dealership, it was determined the pcv was clogged with ice resulting in a blown rear main seal. There was a recall for a defect in earlier terrains for this same issue. Currently GM will not cover repair costs under this specific recall despite this vehicle apparently having the same 2.4L Ecotec engine. Apparently this a known cold weather issue for this vehicle.

Questions About This Lawsuit? is not counsel or the settlement administrator in this class action lawsuit. Our goal is to inform owners of these vehicles of the recent lawsuit. This post will be updated when/if new suit information is released.

Please considering subscribing to this post for critical updates.

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Last Updated on August 10, 2022

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20 thoughts on “GM 2.4L PCV System Problems Leads To Lawsuit. So What’s Going On?

  1. Avatar
    John Brooks
    October 21, 2022 at 11:43 am

    For 12,000.00 Bought 2013 GMC Terrain 2.4 ecotech engine. Drove 6000 miles and jumped timing wrecked valves so needs an engine

    1. Avatar
      November 10, 2022 at 9:15 am

      I have been dealing with the same PCV value issue for a few years now and never knew there was an active suit for the issue. Does anyone know if it is to late to join the suit? If not what would the process be?

      1. Christopher
        November 11, 2022 at 10:14 am

        Nathaniel this is an ongoing case, so you won’t need to do anything to be considered a part of a potential class action settlement. If this case settles, anyone who was affected would be able to claim compensation. But we do recommend adding your complaint so we have you on record and send you any important updates that pertain to this lawsuit. Hope this helps.

        1. Avatar
          kurt sovine
          December 9, 2022 at 11:17 am

          How do you add your complaint to the lawsuit?

          1. Christopher
            December 14, 2022 at 7:30 am

            Hi Kurt. You can add your complaint by following this link: Add your car complaint.

        2. Avatar
          Greg Van De Grift
          January 1, 2023 at 9:03 pm

          Our 2017 terrain is in shop now has blown rear main seal caused by plugged pvc. It has the 2.4 echo tech. Would have never purchased this vehicle had known about this issue.

          1. Avatar
            January 6, 2023 at 8:02 pm

            2017 terrain rear main sealon my wife’s vehicle went out a couple weeks ago. Well that’s when I noticed the fresh oil stain on the driveway. Pep boys gave me a $5200 estimate for repair. How do we join the class or is there a need? Who do I have my info to?

          2. Christopher
            January 8, 2023 at 8:12 am

            There is nothing you need to do to join this lawsuit. However we recommend you add your complaint so when a settlement is announced, you receive an email alert. Add your complaint here.

    2. Avatar
      Wayne w
      January 20, 2023 at 9:41 am

      This just happened to our 2016 GMC terrain with only 40,000 miles on the engine. What a piece of crap. They did a complete new rear main seal and then we had to take it to another mechanic which they cleaned out the upper intake with the whole thing the orifice and they also put a new cam cover which was full of sludge and did a complete engine clean out. Now we get less gas mileage it seems like it just eats the gas very fast. What a piece of crap. And GM doesn’t do anything about it it’s just horrible, GM products are crap anymore I will recommend to everybody I know and maybe even make a video I’m sure there’s lots of them on YouTube but one more won’t hurt to let everybody know about this problem and GM’s not taking care of it cuz it cost a total of almost $3,000 for the jobs out of our pocket. And again it’s using twice as much gas the gas gauge goes down real fast it really sucks

  2. Avatar
    Dalia Brito
    November 29, 2022 at 3:42 pm

    Our 2013 Terrain is currently in the shop. Started with oil consumption, fuel inefficiency, timing chain problems, Reduced Engine Power, damaged PVC etc. etc.. we’ve spent thousands for repairs. How would I be able to join this potential class action lawsuits. Thank you.

  3. Avatar
    December 3, 2022 at 9:59 am

    Last year the rear seal in our 2017 gmc gave out leaking oil everywhere spent thousands on mechanics figuring out the problem ended up being the pvc system.

  4. Avatar
    December 29, 2022 at 11:26 am

    Have a 2017 Equinox. It needed a new transmission at 100k miles and the rear main seal just went after single digit temps. So far in repairs I’m at over 5k. Shouldn’t have purchased this vehicle.

  5. Avatar
    Nate Jones
    December 29, 2022 at 6:46 pm

    2016 terrain. After noticing a pool of oil under my car, I took it to our mechanic and was told it was the PCV valve issue which caused the rear main seal to break. Intake manifold also needs to be replaced for a total of $2700. Not once was I informed by GMC about the possibility of this issue. I would think they would at least inform their customers of a possible issue and let them decide rather than cover it up and screw over customers. I’ve signed on to the class action lawsuit. I was also told to try to contact GM and submit the bill of repairs and ask for a reimbursement. Has anyone been successful with this or have any tips on what to include in the letter to get reimbursed?

  6. Avatar
    December 29, 2022 at 7:43 pm

    My 2017 Equinox rear main seal just went in 18 degree temperature. I’m livid!

  7. Avatar
    December 29, 2022 at 9:44 pm

    I have a 2012 Malibu with the same problems. Could this year be included also??

    1. Avatar
      December 30, 2022 at 3:17 pm

      Same issue with my 2021 malibu. Pcv orifice on 1.5 turbo may have now caused a rear main seal to blow out. Was a $1650 fix for the orifice, now I’m looking at thousands to fix it. How is this not a recall yet?

  8. Avatar
    Jim H
    January 3, 2023 at 7:14 pm

    I own a 2016 Chevy Equinox 2.4L. I also had the same issue as many have posted. On December 21st, 2022 the temperature was about 5 degrees outside. The car was running normal and suddenly the rear main seal blew out causing catastrophic oil loss within seconds and the motor was making noise and died. Everything under the car was covered in oil. This is a very common cold weather PCV problem on the 2.4L engine from all the posts I’ve seen on the internet. I called my Chevy dealer , Bowman Chevrolet in Clarkston, Michigan and talked to Ray in service and he said there are no recalls on this issue and there is nothing Chevrolet will do for me, not even a discount on a new motor.

  9. Avatar
    January 17, 2023 at 10:54 am

    Had all the same problems who do I contact to cover this

    1. Christopher
      January 17, 2023 at 12:54 pm

      Ken, this is currently an active lawsuit. You may try to contact your local dealership to see what they are willing to help with.

  10. Avatar
    Darin Sebastian
    January 21, 2023 at 8:13 am

    Our 2017 Chevy Equinox 66,000 miles. blew the main rear seal, on Christmas Day. had the car towed Home and then Towed to the Dealership, Hoping that Gm would help us as the car is barely out of warranty and this is a known problem. Service manager said that Gm would not help so car is being repaired now so far at a cost of $2600.00 pending that there is no further engine damage done and no guarantee that this would not happen again.

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