1. Getting into boost while your oil temps are cold.One of the worst things you can do to your turbo is get into boost hard before oil temperatures are warmed up. If you don’t have an oil temperature gauge, a good time is usually a few minutes after your car has reached normal operating temperatures. This usually takes 5-10 minutes but depends on oil type and environmental conditions.
2. Waiting too long before oil changes
Your turbo requires clean and healthy oil for maximum lubrication. If you oil has broken down, it’s not receiving the proper lubrication.
3. Using cheap non-synthetic oil
You don't want to cheap out on your oil. A synthetic oil is thinner, resists extreme temperatures better and generally lasts longer.
4. Shutting your car off immediately after driving it hardDrive your car gently for the last minute or two of the drive, or let the car idle afterwards for at least 60 seconds. By letting it run. the oil will continue to circulate and cool down the turbo. One of the main reasons your turbo will die is because of oil “coking”. The oil that lubricates your turbo can heat up and form solid oil deposits. This is especially important under racing conditions.
5. Not checking for boost leaksBoost leaks can cause your turbo to overspin, which leads to failure.
6. Having PCV system failuresOn many engines the PCV system is linked directly via a diaphragm to the intake manifold. When these fail, the PCV system becomes a large boost leak, over-spinning the turbocharger.
7. Running too much boost
Excessive boost pressure can cause heavy, damaging surge or overspin the turbocharger at the top end of the RPM band.
When your diverter valve fails you get pressure spike between shifts that puts excessive load on your turbo.
9. Getting your car tuned by an amateur
Building a performance car is an expensive hobby. You can cut corners on certain parts of the build but this is not the place! Certain factory turbos will tolerate being pushed very hard, but others will not. You need an expert to navigate these waters without shredding your parts.
10. Having a low priced replica turboTypically these are cheap for a reason. Corners are cut in material quality, assembly tolerances, and balancing which make these frequently short lived.
11. Revving the car immediately at startupIt’s important to allow proper lubrication for the turbocharger and other engine parts (such as pistons) to be established before revving the car up.
12. Having a poorly function cooling system
The coolant system must be correctly functioning. If equipped, this includes the after run pump which helps maintain reasonable temperatures within the turbo internals (CHRA) after shutdown.
13. Having improper oil feed and drain lines
This is often overlooked when piecing together turbo kits on your own. As with many things OEM manufacturers do it right. Line size restrictions and routing are the two main failure causes when it comes to turbo oil and coolant lines.
14. Not priming your new turbo after installation
Replacing your old blow up turbo? Don’t forget to prime the new one! This ensures that your new turbo doesn’t run dry on it’s first startup.