something in the coolant

[Sammy3700]

I have a L3700 with 120hrs. I was looking over everything Saturday and in the reservor tank there was a white cloudy stuff in the bottom, was not mixed with coolant. The coolant is green. I clean the coolant tank and added new antifreeze ran it for about 2 hrs, untill dark. Checked this afternoon and the white cloud is back in the bottom of the tank. Anyone have any thoughts? Thanks

 

[E/S]

Sample the white stuff, is it oily ?

E/S

 

[boomer1025]

My Boomer has it in the surge tank also, most possibly it's sealant/conditioner put in at the factory. A lot of auto manufactures use to put sealant and dye in the coolant.