No don't install another injector. Take the one out of the suspect cylinder and swap it with say cylinder no 1. What you are trying to do is see if the sound follows the injector. This is the quick 5 minute way to save yourself a lot of work if it is a bad injector.

Nailing sounds like someone is smacking the cylinder head with a hammer.

Unfortunitly over the net I cannot listen to the sound, but it could be a bad valve. It isn't a glow plug either, just forget about them for now. But it could be a bad pre chamber, maybe the ball is rolling around inside.


You should adjust the valves and inspect the valve train anyway. Every 617 owner should do this when they purchase their car.

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2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200