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whats this noise? (fresh motor)

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I don't think it's a knock almost sounds like valve tapping. Are you using hydraulic lifters or solid? Can you feel the vibration in the head if you touch it? Who built the motor? You might need your valves relashed but it's hard to say without seeing it in person. I wouldn't drive the car until you figure that out or you might be rebuilding it again. What's your oil pressure at idle?
 
I disagree, this sounds like it's in the bottom end to me. It's slight, but it's there.

Yank the pan and see where you're at.
 
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damn i didnt want to hear it but ok. i can check all that in the morning only problem is i absolutely need to drive it to work in the morning and that's it, i can leave it there, think that would hurt anything? I've been babying it like i should obviously, if it goes away or for that fact i can't hear it any more at any sound response at throttle does that change anything?

btw stock hydraulic lifters i will check for vibration and all that in the morning and let you guys know, my heart is currently broken LOL
 
It does sound like cams. This is weird. Who built it? Is it blueprinted?

It also seems like an engine tuning issue. Has the ecu been reflashed or retuned?
 
Doesn't matter dude something isn't right. I would find a ride asap to work I personally would not drive it anywhere. Sebba is right it could be in the bottom end. It's hard to tell from the video. Is a days pay worth another rebuild? Did you build it or a shop? If it's rod bearing failure it can only make noise at certain rpm regardless of that it's still causing damage weather it be in the top or bottom end.
 
im sorry no my info needs to be updated i blew the motor this is a fresh built all motor for breaking in eagle rods, weiesco pistons, nitrated crank arp studs, ported head ss valves and retainers stock lifters and cams, i live in an apartment complex no space to drop my oil pan i have access to a garage filled with tools thats my problem, i have to tow it there i guess
 
You can't stick a pan under it and yank the drain plug?

I did a motor swap right in front of my leasing office :D Finished just as the tow truck arrived, bitches.
 
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