> Tiger _ wrote:
> >
> > sorry bout that. the heat doesnt work either. doesnt work at all. and it
> > overheats at all running elements. idling and driving. thermostat is brand
> > new along with radiator hoses. when it does get hot both radiator hoses get
> > extremely hot and hard.

Does it first overflow to the recovery then the temp rises, or does the
temp rise then the coolant overflows? Also do you hear any gurgling
sounds in the heater core with the heater on and the engine revved?

Sounds for sure like you are getting exhaust pressurizing the cooling
system. If you don't want to do the chemical test route, have the
cooling system pressure tested at a shop. They can tell if the radiator
is being pressurized by the exhaust.


> > >From: Roger Brown >
> > >Reply-To:
> > >To:
> > >Subject: 87 4 runner overheating/no heat
> > >Date: Mon, 11 Oct 2004 11:37:53 -0700
> > >
> > >Scott wrote:
> > > >
> > > > i had a blown head gasket in my 22re 4runner. i replaced the whole top
> > > > end. new head, new cam, new valves. everything went fine for like 3
> > > > weeks and now its overheating badly. there is no coolant in the oil
> > > > and no oil in the coolant. truck runs good forlike 10 mins and then
> > > > the temp guage shoots up to red and the overflow tanks boiles. the
> > > > doesnt work either. can somone please shine some light on this
> > > > problem. i realy dont feel like having to replace a bottom end now.
> > > > email me if you have any ideas. thanks.
> > >
> > >Did you determine and correct the cause of the initial blown head
> > >gastet? If not, its likely done it again. You can see if its an
> > >exhaust gas leak into the cooling system with the info. below:
> > >
> > >http://www.arrowheadradiator.com/hea..._leak_test.htm
> > >Most of the time head gaskets don't just blow on their own, something
> > >gives them a helping hand, so to speak. They are usually a symptom of
> > >an underlying problem.
> > >
> > >You state
> > > "the doesnt work either"
> > >The "what" doesn't work either?
> > >
> > >Probable causes are a clogged radiator, collapsing lower radiator hose,
> > >worn water pump, bad thermostat, bad fan clutch, or an engine running
> > >with bad timing or fuel/air mixture, etc.. Figure out what is wrong and
> > >fix it. What causes the overheating? High or low speed driving,
> > >prolonged idling, hot or cold outside temps, high engine load, etc.?


--
Roger