Thermostat and overheating

On Mar 25, 11:21 pm, Jim Behning
<jimbehn... DeleteThis @doesthisblockpork.mindspring.com> wrote:
> On Wed, 26 Mar 2008 02:36:20 -0000, "Mandie @k@ Zepherous"
>
>
>
>
>
> <shp... DeleteThis @gmail.com> wrote:
> >Golf umwelt CL estate, 98. AAZ engine.
>
> >Keeps overheating, solved by replacing thermostat , bottom hose heats fine
> >etc
> >then within a couple of days car overheats, bottom hose stays cold.
> >We have replaced the thermostat 4 times now (from different sources)
> >Radiator has been replaces and the waterpump.
> >I also notice that there is quite often a stagnant smell through the heater.
> >I don't know if this is relevant but the previous owner totally removed the
> >pollen filter
> >so now just a hole there.
>
> >Any advice would be really appreciated.
>
> I thought I have read here that sometimes you have to replace the
> larger hoses as they can collapse. If you put a big piece of cardboard
> where the filter is and you never turn on the fan you might not get
> any stink from crud growing around the heater core or evaporator coil.
> I removed the evaporator coil in my truck. I had grass seed
> germinating in there.

A couple of things:

a) There are stainless steel springs that will fit into such hoses to
prevent collapse. Best is a new hose, of course, but if the radiator
is somewhat restricted this is a viable alternative.

b) First, clean the drains for the heater core. There are specialists
who will also de-mold the system at a healthy cost, however. One may
pour a diluted chlorine bleach solution through the system with the
understanding that chlorine attacks metal, especially aluminum, if
allowed to rest against it.

c) If the alternative is a replacement heater core together with the
removal and/or cleaning of the fan box and so forth, and you are
scrupulously careful you may pour a dilute solution of chlorine bleach
and ammonia through the system. This will produce Chloramine Gas (a
very toxic gas that kills about anything it touches), ammonia also
attacks aluminum, and this is generally a hazardous option when NO
OTHER ALTERNATIVE IS AVAILABLE. Do this outside, do not expose
yourself to the gas released, wear gloves and eye-protection, dilute
the household bleach 3:1 and the household ammonia 2:1. Use CLEAR
ammonia. Do not do this where the drained material will leach into the
ground immediately, or catch it if you can. It is OK for the solution
to go into storm or sewer systems, just not into the ground as (again)
it is temporarily toxic. Do not drive the vehicle for at least 12
hours after this sort of treatment, but it is good to run the fan (all
windows & doors open, and use a house-fan to blow air through the
cabin) during the process to get the chloramine gas through the entire
system. Nasty stuff, but does the trick where Lysol and other
materials do not.

Peter Wieck
Melrose Park, PA
 >> Stay informed about: Thermostat and overheating 

is the waterpump pushing coolant?

"Mandie @k@ Zepherous" <shpams.DeleteThis@gmail.com> wrote in message
news:47e9b6ac$1_2@mk-nntp-2.news.uk.tiscali.com...
> Golf umwelt CL estate, 98. AAZ engine.
>
> Keeps overheating, solved by replacing thermostat , bottom hose heats fine
> etc
> then within a couple of days car overheats, bottom hose stays cold.
> We have replaced the thermostat 4 times now (from different sources)
> Radiator has been replaces and the waterpump.
> I also notice that there is quite often a stagnant smell through the
> heater.
> I don't know if this is relevant but the previous owner totally removed
> the pollen filter
> so now just a hole there.
>
> Any advice would be really appreciated.
>
>
>
 >> Stay informed about: Thermostat and overheating