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I have a noise in my 280ZX Turbo engine. It is kind of a tick like a valve but it is intermittent - by tha tI mean it is not constant in that it skips a beat every once in a while. I changed oil, etc and it is still there. I first though it wa sa valve that maybe needed adjustment but I have never heard a valve do this. Could it be a rocker arm loose? Or ??

THe car still runs great and the noise goes away under load and very low RPM - for example if I put on the brake and let on the clutch while it is in gear, the noise goes away.

Any help will be appreciated.

BOB
 

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If you have solid lifters, it could be a valve out of adjustment.

Or it could be an exhaust leak. That can sound like a tick too.
 
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