[Vwdiesel] thermostat blues

[Pam & Doug Boes]

I think my thermostat was stuck closed. I pulled off the lower hose and only
a dribble of coolant came out. I tried to remove the thermostat housing but
snapped off one of the screws. Plenty of coolant came out of the radiator.
Does anyone know any tricks for removing screw stubs from the water pump
housing w/o removing the housing from the engine of the Caddy? I've doused
it with PB Blaster and plan to grab the stub with vice grips and try tapping
it loose.