The 3.4L M97 engine in 987.1 Cayman S models is susceptible to bore scoring due to Lokasil cylinder coating wear on forged pistons, while the 2.7L base and 2.9L 9A1 engines are not affected; pre-purchase borescope inspection is the recommended diagnostic.
Bore scoring risk in 3.4L S engines
Porsche Cayman (987) · mechanical