We just got in a 2007 Cayman S with timing chain and cam actuator faults and found the chain tensioner failed. After replacing the chain tensioner, cam actuators and intake cam gear we found one of the lifters was collapsed and causing a knocking sound after the engine warms up.
If you have a Cayman with the same problem and live in the Doylestown or Bucks County area give us a call at (267) 279-9477
