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Read this entire page before purchasing a PCV Fix/Upgrade Kit!!!
These fix/upgrade kits apply to the following vehicles with the GM 1.4L Turbo LUJ/LUV/A14NET engine:
2011-2016 Limited 1.4L Cruze
2011-2019 Chevy Sonic/Aveo
2015+ Chevy Trax
2015+ Buick Encore
2011+ Opel/Vauxhall Corsa (Turbo only)
2009+ Opel/Vauxhall Astra J (Turbo only)
2010+ Opel/Vauxhall Meriva B
2011+ Opel/Vauxhall Zafira Tourer
The 1.4L Turbo engine (LUJ/LUV) in the Chevy Cruze/Sonic/Trax and Buick Encore has a check valve in the intake manifold that has a 100% failure rate. Out of warranty, it can cost more than $350 to replace. There is no redesigned part for this (at the time of this post's writing), and new intake manifolds are still failing. The Dorman intake manifold reportedly has the same flawed design and is susceptible to coking, clogging, and check valve cracking, as reported by other 1.4T Owners. The newest V3.4+ PCV fix kit is less expensive, more durable, easier to install, and more easily serviceable than any other option.
DISCLAIMER: This solution has been tested, proven, and is generally considered reliable. To ensure a proper install, MAKE SURE YOU READ AND UNDERSTAND EVERYTHING IN THIS POST. Neither I nor CruzeKits.com nor CruzeTalk.com accept any liability for what happens during or after the installation of this kit. Proceed at your own risk. This is a kit that is being offered for your convenience. It is your responsibility to ensure that the components are working correctly and remain in good operating condition to prevent any issues. It is your responsibility to ensure that the components are clean (such as the check valve and the brake booster tee fitting on the V2 kit) to ensure there are no potential issues.
Read the first post on the following thread, which explains how our PCV system works and will help you understand the solution better:
https://www.cruzetalk.com/forum/34-gen1-1-4l-turbo/175793-cruze-1-4l-gen1-pcv-system-explained.html
The basic principle is simple. You have two chambers; the intake downstream of the throttle body, and the PCV chamber. You need to allow gas to freely flow from the PCV chamber into the intake chamber when the engine is under vacuum (not producing boost), but block that flow of gas when the engine is producing boost. The OEM intake manifold check valve serves this function well, while it works, but the check valve stops sealing well after a few thousand miles, producing an audible boost leak, sometimes disappears altogether, or gets stuck and no longer produces vacuum on the crankcase. Failure of the intake manifold check valve usually does not trigger a check engine light on its own, but can contribute to other faults. This solution offers you the ability to cleanly retrofit a durable, leak-free external check valve that can be serviced easily and replaced for $5 (V3.4) should the check valve itself ever fail.
Benefits to the fix kits are:
- Extremely robust, overbuilt components that ensure many miles of trouble-free operation. To date, not one person has needed to service their check valve after installing this kit. This kit use only high end components with Made In the USA brass fittings and a high end check valve made in Italy that resists chemical degradation, gumming, and blockage while also being easy to clean if needed.
- Eliminates boost leak caused by aged, worn, or clogged OEM check valve by replacing it with a high quality, high heat resistant cone-style check valve utilizing an NBR seat.
- Solves for loss of crankcase vacuum caused by stuck/clogged OEM check valve.
- Solves boost leak, loss of power, poor fuel economy, and oil consumption caused by missing OEM check valve
- The new external check valve is easily accessible for cleaning, and can be replaced for $5-15
- Stops oil consumption caused by missing check valve. Oil consumption will cause carbon build up on the piston crown and ring lands, which can cause detonation and piston damage.
- Much longer lasting valve than the OEM check valve due to more robust design.
Check out the original discussion thread, containing over 40 pages and nearly 500,000 views, where this PCV fix kit was introduced and reviewed:
https://www.cruzetalk.com/forum/34-gen1-1-4l-turbo/189402-gm-1-4l-turbo-intake-manifold-pcv-valve-fix-kits.html
CruzeKits.com PCV Fix kits address failure of GM Intake Manifold Part 25200449
There are three PCV fix kits available for fixing this PCV system. All of these kits have been thoroughly road tested. The principle behind them is the same.
V1 Kit Summary: This is the original PCV fix kit. This kit connects underneath the manifold, using a brass check valve, and taps into a throttle body spacer for a vacuum source. Because this kit requires a throttle body spacer, it is more expensive if you don't already have one.
V1 Kit Benefits:
- Easy to inspect/clean the check valve without manifold removal.
- Heavy duty brass check valve offers maximum durability. (Owners report 80,000-120,000 miles of use between cleanings)
V2.1 Kit: This kit was designed to save cost over the V1 kit by not requiring a throttle body spacer, and instead splices into the EVAP purge valve line for a vacuum source using an easy splice kit. It installs underneath the manifold similar to the V1 kit. The only drawback is that the check valve cannot be easily removed for inspection without pulling the intake manifold itself.
V2.1 Kit Benefits:
- Better value than the V1 kit
- Heavy duty brass check valve offers maximum durability. (Owners report 80,000-120,000 miles of use between cleanings)
V3.4 Kit: The V3 kit was designed to maximize the value of the kit and simplify installation. By design, the V3 kit also replaces the corrugated section of hose from the intake manifold to the turbo, which is prone to cracking. It is installed from the top of the engine bay and does not require manifold removal. This is our most popular kit.
V3.4 Kit Benefits:
- Best value
- Two fixes in one - replaces crack-prone corrugated section of hose with durable PCV hose by design
- Comes with two quality Viton PCV valves (expected service life of 20,000-40,000 miles per valve)
- Valve is serviceable from the top of the engine bay in 2 minutes using only pliers
- Can be installed without manifold removal
Refer to the thread on CruzeTalk.com for V1 PCV Fix Kit installation instructions:
https://www.cruzetalk.com/forum/129-gen1-engine-transmission-tutorials/230242-how-gm-1-4l-luv-luj-pcv-fix-kit-v1-install.html#post3138522
Refer to the thread on CruzeTalk.com for instructions on removing and reinstalling the intake manifold:
https://www.cruzetalk.com/threads/how-to-remove-2011-2016-cruze-1-4l-intake-manifold.190442/
Having trouble with your Cruze PCV system? Check out this video to understand how the system works, what the common trouble spots are, how to diagnose them, and how to resolve them.
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