I did the search and found out the VTC springss are a main cause for the knocking. Mine is a 96 and does not have the springs. Is there a chance that the intake cam gears are bad ? It is not the lifters/valves. We used a stetchescope and the noise is coming from the driver side behind the timing cover.
Please advice.
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1996 TT Knocking behind the driver's side timing cover - 300ZXTT(OH)20:49:02 05/08/08