I've mentioned before that my 986 had developed a very small, slow oil leak on the passenger side of the engine. There are many things I am willing to DIY, but internal engine repairs are not one of them. I suspected the leak could be something simple like a cracked spark plug tube, but also be something serious like the Rear Main Seal. It turns out the car was leaking from Cam Valve cover near the Cam Actuator Sensor.
According to the mechanic, this is not an overly serious repair and would not cause an engine failure, but it would likely get worse and cause the sensor to fail. I decided to go ahead and have it fixed, because they said they could do it without dropping the engine which is what the service manual suggests.
This was a very expensive repair, costing $1600, including a $600 part I probably could have gotten for half the price if I hadn't been at the dealer. That said, I am glad to no longer have an oil leak as I plan to keep my 986 for many years.
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