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of course its knocking. ;(

That sounds like a valve tap to me. Spun rod bearings usually have a more hollow "tok tok tok" sound to them. Could be mechanical (tight valve/bent valve/valves need adjusting

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		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Forced Induction
of course its knocking. ;(

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11-06-2012, 02:47 PM	#11 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 419	That sounds like a valve tap to me. Spun rod bearings usually have a more hollow "tok tok tok" sound to them. Could be mechanical (tight valve/bent valve/valves need adjusting -- which I don't think you can do on this head) or possibly related to a wonky VVEL sensor/controller. Low oil levels could cause that too... but then where did the oil go? Only other thing I can think of is what Steve was saying about the flex plate. I'd get a leak down test and see what's up -- good luck! __________________ Enjoy it. Destroy it.

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