Buick Engine knocks

[JohnyBeeO]

Hey all

I have found the problem! Onewaterchanel behind the waterpump was clocked. I clean all coolchannels and now the engine is running very sweet!

[corydebates]

sounds and looks like a valve hitting a piston cuz it only does it on a certain stroke of the engine when that specific valve would be open.

[jalm6868]

I had the same thing with my buick 350 I think it was a lifter