Wolfman, I haven't started that project of removing the thermostat housing. Looking it over the worst of what I think I see is a stud on bottom of the housing. I see 5 bolts and a stud. I went to my Kubota dealer to find out about the availability of the housing, it is still available ($115) with about a week order time. When I start that project I will try to remove it without removing the head, can always remove the head if necessary. My project now is deciding weather to rebuild or replace the lift cylinders on my L355ss L1720 loader. Since I don't know what I will see on the inside as far as damage to the cylinders I am toying with replacement cylinders. Bad part with replacements are the in/out ports are on one side of the cylinder and the pins are 1/8 larger than the replacements, either way it looks like a lot of work. Thank, cabhopkubota