Report: Plastic Timing Chain Tensioners May Fail and Cause Engine Damage
Jaguar XJR Problem
On this V8 engine, timing chain problems are very common. Because the timing chain tensioners were made from plastic, they can fail prematurely and cause serious engine damage. A noticeable engine noise while idling or during a cold start can indicate a timing chain tensioner problem. The engine noise may also be accompanied by a rough or uneven engine idle. Improved components are available to remedy this problem.
Visitor, 1996 Jaguar XJR, 206,045 mi
New engine due to timing failure