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SonicVQ · 10-08-2021, 07:47 AM

To my ear, that is something in the valve train.
Rod knock is typically a lower frequency with a solid "thud" sound, with a rattle when you rev it.

Lowest cost next option: Pop off the valve covers and have a look.

10-08-2021, 07:47 AM	#12 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 230 Drives: G37 Sport Rep Power: 6721	To my ear, that is something in the valve train. Rod knock is typically a lower frequency with a solid "thud" sound, with a rattle when you rev it. Lowest cost next option: Pop off the valve covers and have a look.