Get on a steep grade - 35% - backend up hill. With the pressure cap off the
coolant tank, run it until it warms up and thermostat opens. Run a little
longer, then fill the coolant expansion tank with proper coolant, put the
pressure cap on, and you shouldn't have any more problems.

John Rodgers
88GL Driver

Dan Johnston wrote:

> I've just replaced both sensors by the thermostat housing and about 3-4
> cups of antifreeze came out. do i need to bleed the whole system?
> thanks,
> dan