ok , here is everything i have done to the ls motor.
Block
new ross racing pistons and rings
eagle rods
gaskets etc.
block is decked by a shop

Head
had a valve job done on one cylinder, and preasure checked the other and they are ok. had no preasure on one cylinder but is good now.
Also milled the head
resurfacing/decking/hot tank all at a shop. this is the second head we tried on it. so it cant be the head!!!!

NOW I HAVE BEEN HAVING COOLANT BURNING IN THE CYLINDERS. It blows out so much white smoke it covers my whole block down the street. THEN WHEN ME AND MY FRRIENDS TAKE OFF THE HEAD THERE IS ALSO OIL ON THE PISTONS And yes my head gasket is on right metal thingy on the left.

I AM GETTING SPARK
TIMING IS ON
I HAVE FUEL PREASSURE
IT HAS COMPRESSION BECAUSE WE STARTED IT UP A FEW TIMES NOW.

WHAT IS WRONG WITH MY LS REBUILD
I HEARD IT COULD BE A CRACKED BLOCK
my friend rebuilt his and its fine. he has no clue what is wrong with mine

pm me if u have any idea what the problem could be!!!1

 

man it really sounds like your headgasket just isnt sealing up.

I had that problem on a mini-me I did. Try a new gasket I guess.

 

Sounds like you hooked a coolant line to a vacuum source!

 

i agree with dave, nukka

 

thats possible too, never thought of that.