The problem with those is that the stud is steel. It rusts and fills the
space between the stud and housing with rust. Since rust is bigger than the
parent metal it is packed in really tight. I assume the top piece that the cap
screws onto is removed. Take a drill with a 1/16" bit and drill down between
the stud and the aluminum housing. Work your way around each stud drilling out
the rust. This will give the penetrant somewhere to go. After drilling out the
rust fill the area around the stud with your favorite rust buster. Let it
sit for a few days topping it off if necessary. You can also tap the studs
sideways a bit with a plastic hammer to break up the rust. Then heat the
housing
till the penetrant just starts to bubble. (warning: it may flame on you) Then
tap the sides of the housing with a plastic hammer. This should break it
loose. Once it is apart I usually replace the studs with ones made from
stainless steel. My next choice would be to clean and paint them then squirt
grease
between the stud and housing when put back together.
keith
In a message dated 7/29/2008 1:40:12 P.M. Pacific Daylight Time,
vociferouschicanery@yahoo.com writes:
hi everyone
i've been soaking (with liberal applications of PB Blaster) the studs
holding on the thermostat housing to my aluminum R16 head for over a month.
and it
still won't budge. i've tried some manual persuasion of the hammering
variety, to no avail. should i add a little heat?
s
675MIZU
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