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Q:

Valve knocking on 2000 Jaguar S-Type

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Could this be the type of gas i am using or the oil not the right type ?
(1) Answer
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Get this properly checked out preferably by someone with Jaguar experience. This engine had problems with timing chain tensioners if left neglected results in expensive damage. Pinging could be caused by poor quality gas but the engine has knock sensor/ignition control. Is the Check Engine Light on?