Ok here is the situation.

Build is using BRAND new B20B Block with a used ITR head.

Head looked to be in good condition with the gasket still on so i just used it as is with new B20 gasket.

Everything is connected no leaks so cranked it for a about 30secs with dizzy disconnected and ECU fuse pulled.

Started up after a bit of a shuddering and idleing pretty high. About 1min after starting it starts smoking it looks white and its not condensation as it lingers around for a bit. Cant smell anything in the smoke either.

After a couple more minutes the smokes still coming out so i shut off the car.

I have checked the coolant still looks pretty clean and oil is clean also. I pulled the spark plugs out and look down onto the piston tops. I can see it is damp/wet as there is a light reflection from my fluro light.

So its definitely oil.

I have started it up about 3 times after different days each for 3-5 mins hoping the smoking would stop but it doesn't.

So my question is why is there oil there?

Its a brand new block so i think can't be the rings must be the head?

How long does it take for the rings to seat and is it normal for smoking on startup or how long should it smoke for?

I suspect it could be the valve stem seals.

Can a leak down test determine leaky seals?

Any help much appreciated.
Cheers.

 

Anyone got an idea whats wrong?

 

if its brand new, you probably just need to break in the rings. Go drive it and do some moderate pulls at about 75% throttle up to almost vtec.
Then slowly start raising the rpms each time. Also let the engine"brake" as you decel. (leave it in gear as you coast)
This is how i break in rings and have had no comebacks yet. Everyone has there own way though.
Brand new rings will smoke a little bit( from my experience). It will get less and les as you put more miles on it.
good luck!