Hi i am testing my Lovson 6/1 until now i have what i expect after reading the forum here.
But during the first test i have a oops  where is my water flow. it is to low what is this sand?
until this moment the engine is clean from sand.
So i take the cylinder heat off and   there is only 4% from the opening in the cylinder heat if you but the packing on it, this is a big  mold fault in every cooling channel.
no it is not sand it is 12mm metall blocking.

p.s. i have pictures but the inserting in this post is a not soved problem for me.

Thanks for any help