Yeah I hope so too. That was what I mentioned about the temerature
compensation board. On these 240s, the Temp comp. board can start
going out, and then you have no idea if it's actually hot or not. The
sypmtoms only happen when it SHOULD be hot, though (stuck idleing for a
long time in 90 degree weather), so I leaning toward the air bubble in
the cooling. How do I bleed the cooling system? I've done that on
Hondas that have bleeder valves, but it seems like it could get real
messy real fast on this beast.

If there is air in the system, will it eventually work it's way into
the reservoir? That's what I was counting on... I have never had a
vehicle that didn't have the cooling system cap on the top of the
radiator, but I assumed it was the same/ similar.

It is a mechanical fan and the fan clutch seems OK. When I was
flushing it, I had the lower radiator disconnected pointing downward
into a bucket, and while running the engine, not much was coming out...
maybe I didn't run it long enough for the thermo to open.

thanks for the ideas!

loren

sdlomi2 wrote:
> "lolo" > wrote in message
> ups.com...
> > My 1990 Volvo 240 wagon runs a little hot when in traffic on a hot day.
> > It doesn't overheat, but it still makes me nervous. I flushed the
> > coolant, and it still does it. I also cleaned the contacts on the
> > temp. compensation board and installed a new thermostat. The heater
> > seems OK. When i turn off the heat, it stay on for a while while I am
> > trying to get cold air out. It is kind of a strange cooling system on
> > this car, there is no radiator cap, and no drain plug either - you just
> > take the lower radiator hose off and watch coolant go everywhere except
> > in the container it is supposed to. My last vehicle was a toyota truck
> > from the 80s and it did the same thing when I got it, but flushing it
> > out worked perfectly, because there was a bunch of gunk in there. The
> > volvo coolant seemed clean.....
> >
> > Do I just need to re-flush that shizzle, or??? I have never had this
> > happen on any of my cars where it would not go away.
> >
>
> One thing mo Are you sure it is really heating? Try checking the
> temp. with another method--always a possibility the gauge is giving
> inaccurate readings. Hope this is the case. s