Hard knock.

[miguelmcv]

I was making some logs from 3th to red line, But when I did the 2th pull, once I heat my rev. target, I released the accel. and a knock sound came out.
I don't know where is coming from, sound like the oil pan or the valve cover.
I removed the valve cover and everything looks good,
When driving back home, As more I accelerate the knock sounds louder. My oil pressure still the same, which I don't think the knock is coming from the oil pan.
I noticed when I removed my valve cover and start the engine, there are two tight holes in the head that oil comes out with pressure and hits the hood.
Wondering if this is normal.
Here is a pic showing the two holes that I am talking about. It has a red circle on it.

 

[JuGs]

yes the 2 holes are normal.

 

[drooseph]

Sounds like you spun a bearing if the knocking is continuous and gets faster with increasing RPM.

 

[Absit]

Constant rythmic knock that goes in tune with RPM? Drop your oil pan and check your bearings.