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September 20, 2021

Do you own a Porsche 911? Understand the importance of maintenance

By Bruce Powers

Porsche is one of the most iconic vehicles in the world. Known for their prestige, and style. To keep your Porsche in good operating condition, you have to ensure it receives regular maintenance and check-ups.

Porsche 911s can experience some common problems like startup smoke, low battery, and more. Since you have invested in your car, it’s important to know what the common problems are and be aware of how to fix them.

Here are the top common issues we’ve seen in Porsche 911s and their possible resolutions:


1. Air Oil Separator (AOS) Failure

The AOS has caused several issues on Porsche engines. One of the most common indicators is huge quantities of smoke coming out of the engine. Also, the oil cap can become hard to remove due to the high levels of vacuum in the engine.

One of the best ways to avoid this problem is to always follow your maintenance schedule as advised by your manufacturer. Detailed information regarding this should be available in the manual. Any questions can be directed to your Porsche service provider or dealer.

2. Smoke on Startup

An extended puff of smoke as you start your cold engine can be a sign of wear and tear in the cylinders and can get worse with the mileage. Another possible cause is a bad AOS. One of the things that can help with this is the replacement of the fuel injectors. When fuel injectors are leaking or worn out, it can cause fuel to stay in the intake path

3. Low or No Battery Power

A Porsche 911 is not driven as often as other cars. During its down period, it will continue to use some battery power that can quickly lead to a flat battery. Losing battery power may reset important systems like electronics and emissions, and can be a cause of major headaches for the owner.

It’s recommended that you use a battery maintainer every time you don’t use the car for about two weeks or more. If the battery drains completely, it usually shortens its life. If you have a flat battery and need to access the engine compartment, follow these steps:

  • Open the left door
  • Connect a battery power source to meld C3 in the interior fuse panel
  • Flip the door latch to close
  • Use the key to try to lock and unlock the door
  • The front hood release should now function
Porsche 911

4. Overheating

Overheating can cause irreversible damage to your engine. The heat should be regulated as it can affect the engine parts. Once you see smoke coming out and there’s a loss of power, you should stop driving. Common causes are a blocked radiator, a leak in the cooling system, or a damaged water pump.

Stop the engine once you go above 100 degrees Fahrenheit. Let it cool down to avoid risking breakage. You can also try turning on the heater to let go of some heat from the engine block.

5. Heavy clutch pedal

The common cause for a heavy clutch pedal is a leak in the pressure accumulator. It retains the hydraulic pressure needed to operate the clutch. When it leaks the pressure back into the system, it may not function properly prior to startup. A common solution is the replacement of the clutch slave cylinder together with the pressure accumulator.


Autowerkes offers high-quality services for Porsche owners,  we’re dedicated to servicing your vehicle with an unsurpassed level of personalized service and technical expertise.

Make an appointment today, call us at 714-842-2277 or visit us online.