Hi Guys,a newbie owner of a small Iseki 2160 4wd.Just replaced a blown frost plug on the engine and ran her up to hot afterwards.Then I noticed frothy greyish white oil bubbling/ooozing out of the filler cap under the tractor seat,over thew rear axle,thats if this is the filler cap!!!I drove it several miles home after intial puchase with no problems,only a slight leak from the blown frost plug on the engine...whats my remedy or check from here,is there a heat exchanger/hydraulic oil cooler that might be leaking possibly?Any help thoughts appreciated,while Im mechanicaly minded ,tractors and hydraulics are all new!!cheers Dandog