So I just replaced my heads, put new gaskets, new spark plugs, new radiator, new water pump, new upper and lower radiator hose, new fuel pump, new heater core and hoses
So today Friday February 19, 2016 is my 3rd day driving it since. Well I drove it for a couple hours everything seemed normal I parked it at my inlaws and when I left and got on the road it started to make a knocking sound so I came straight home and parked I left it running popped the hood I revved the engine up and the sound got louder and faster. At 50mph and over it doesn't knock. Someone help please I just spent ALOT of money I hope it wasn't a waste...

 

Need more information - vehicle, year, engine ECT. - knock location as in the top of the engine, front of engine or down by the oil pan. tinny rattle or a heavy and hard thumping sound - Sorry but my crystal ball does not reach from Wyoming to Texas

 

98 blazer ls 2 door
Gonna take it all apart today to find the problem

 

Video

 

still need to know top or bottom

 

Sounds like bottom end

 

almost sounds like a spun bearing, how does the oil look

 

Full and normal I just changed it 3 days ago

 

well i can't open the video but that's ok

If you have a harbor freight there or even a parts store that rents out tools on a loaner program get a mechanics sethascope, or even a long screwdriver, chunk of heater hose ect. held too your ear will work.

Touch it too valve covers, oil pan ECT. and pinpoint where the sound is coming from, be aware of moving parts such as fan and belts ECT. while doing this

 

Sounds like rod bearing. Look at oil again. Run dipstick thru your finger. Do you see metal in your fresh oil change????