The goal of these DIY fix kits for the 1.4L Turbo PCV system is to create a more affordable, more durable alternative to repeatedly replacing the intake manifold. Through prolonged use, testing, and feedback from the community, we'd like to share some simple steps that can be taken to ensure that the PCV system and the fix kit continue to operate reliably.
Diagnosing failed check valves:
The PCV fix kits are designed to repair the OEM PCV system with a serviceable, external check valve. However, even these check valves can fail. The first sign of a failed check valve is oil consumption. If you notice occasional smoke from the exhaust or an increase in oil consumption on the dipstick, the check valve should be inspected, and replaced if needed.
V1 & V2.1 Kits:
So far, no reports of failures have been reported with the V1 kit. However, the check valve should be checked every 2-3 years to ensure it is working correctly. To do this, monitor oil level for consumption that would indicate the check valve may not be sealing, and pull the dipstick at idle to ensure that vacuum is being applied through that check valve.
V2 Kit:
The brake booster tee fitting and the intake manifold brake booster nipple should be periodically checked and cleaned (if necessary) to ensure it flows freely and that the PCV system and brake booster continue to function properly. Reports at 25,000, 45,000, 65,000, and 100,000 miles have shown the fitting to be clean, but this should be checked regardless to ensure proper function of the PCV system and the brake booster. A good start would be checking it at every oil change, then adjusting thereafter. A bit of condensation is normal, but if you find those parts do need cleaning, you can use a small pipe brush/straw cleaner or a pipe cleaner (the kind kids use for arts and crafts). It is recommended that all owners of the V2 kit upgrade to the V2.1 design using the V2 to V2.1 Conversion Kit.
V3 Kit:
The original check valve on the V3 kit should be checked periodically and replaced if needed. To test the valve, simply remove it and blow through it both ways. If it leaks both ways, it should be replaced. An upgraded check valve will be released Q1 2021 featuring more durable internals. Check all connections to ensure there is no oily residue that would indicate a leak and that the rubber hoses have not deteriorated.
Other Maintenance/checks:
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Some community members have noticed the PCV system tends to get a little dirty around the cylinder head. To check for this, remove the corrugated/accordion hose connector from on top of the intake manifold and have a look inside to make sure the area looks generally clean. A bit of orange residue is OK, especially during winter driving. This is just condensation mixed with oil.
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To ensure the valve cover is working correctly (aside from the potential for an occasional vacuum regulator failure), check for excessive vacuum by pulling the dipstick while the engine is idling. The engine should be sucking air in through the dipstick, but it shouldn't be difficult to pull the dipstick out.
It is strongly recommended that these engines use synthetic engine oil to help reduce PCV issues and PCV deposits over time. Conventional and semi-synthetic oils have been shown to create excessive PCV deposits, cause blockages in the PCV system, and cause malfunction of the PCV valves. A good store shelf option is Mobil 1 or Pennzoil Platinum, but we do sell AMSOIL if you want the best option available. Please Contact Us if you'd like to place an order for that, or set up your own discounted AMSOIL Preferred Customer Account.
Always remember, it is your responsibility to perform proper maintenance on your car and ensure that all parts and components are in proper working order.