Ed,

I would check off on the items Ken lists below first. I have had a
variety of cooling system problems (on a 90 2.1) recently which started
with overheating and what appeared to be air in the system, gurgling and
bubbles in the reservoir. Before assuming it was a gasket leak at the
head though I replaced the thermostat ( a small cost to remove this as a
possibility) and this was my problem.

-john

Kenneth Lewis wrote:
> Ed,
> The internal head gasket may be leaking combustion gasses into the
> cooling
> system. Do you notice a steady stream of bubbles into the
> reservoir(the tank
> with the blue pressure cap)? The water pump could be shot. The thermostat
> stuck, radiator clogged(does it get hot?). Does the radiator fan work
> on all
> speeds?
>
> Ken Lewis
> http://neksiwel.20m.com/