Brian, the dealer replaced the tensioner only. It must have had a leaking seal because it relies on oil pressure to function properly. I was surprised that it failed at 80,000 miles. No real reason to replace the timing chain at that mileage. The head gasket was previously replaced under Starmark Warranty. I'd confirm that the tensioner is faulty before replacing it. Diagnosis may be difficult because a local independent mechanic listened to the engine and thought that it was OK. The dealer listened with a stethoscope and couldn't identify the source of the noise until they removed the valve cover and did some visual checks. I knew that there was a problem because the noise was one that I had never heard before with the engine idling and the hood up.

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Fred Hoelzle