I forget how the radiator drains

look up the picture on fast lane and see if it is visable

also

buy some new bolts and use alot of liquid wrench when getting off the thermostat.

I broke one of my bolts on my old w123 and it sucked hard. I had to drill and tap a new bolt.

Not a good day.

there is alot of corrosion between the aluminum and steel bolt, some sort of electrolosis.

Other than that it is easy enough. some drill a SMALL hole it the thermostat to facilitate air bleeding... IF you do yours make sure it is tiny as large holes WILL effect operating temps.

If it is cold where you live I would leave it untampered. THose motors do not cook that easy anyway.


good luck

bob c