How to flush coolant system?

I have E30 316 4-cyl carb. BMW with 45000km (yes only less than 30000
miles). It was not in use for 7 years, and coolant was changed some
three years ago.

Now (I think) I have problem with choke on my carburetor. I got it
cleaned (ultrasound) in a local carb shop, and for a while it worked
OK.

My problem: I start cold engine, revs go to ~1000 rpm, then after about
one minute go up to ~1500 - 1600 rpm. But after five minutes or so rpm
starts dropping, so when I stop in traffic its ~400 - 500 rpm, and
sometimes just stales.

Since coolant is running trough the carburetor I suspect that choke
system may be clogged, since engine runs OK once it's warmed up.

I have Bentley and Haynes manuals for E30, but I found no instructions
on how to flush cooling system. I knew where are radiator and engine
block drain plugs.

What is the right procedure to flush cooling system?

Let me just note that chemicals for flushing and professionals that can
do that job is hard to find (at least I do not knew any) where I am.

--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
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> I have E30 316 4-cyl carb. BMW with 45000km (yes only less than 30000
> miles). It was not in use for 7 years, and coolant was changed some
> three years ago.

My first BMW was an '88 316 :-)

> Now (I think) I have problem with choke on my carburetor. I got it
> cleaned (ultrasound) in a local carb shop, and for a while it worked
> OK.

The Pierburg carb in this car is junk. Replace it with a Weber, better
mpg and more power! Your may have a problem with the automatic choke.

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Nedavno John Burns pise:

| The Pierburg carb in this car is junk. Replace it with a Weber, better
| mpg and more power! Your may have a problem with the automatic choke.

Maybe, but that is not easy to do where I am. I bought manual for my
Pierburg 1B2 (still waiting for it to arrive), and I hope to tune so
that it performs as it should.



But my main question was how to flush cooling system on my BMW. Anyone
with suggestions?





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___ ____
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/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **

Nedavno Yvan pise:

| But my main question was how to flush cooling system on my BMW. Anyone
| with suggestions?

Hire is what I thought:

- Turn heater knob on dash to hot.
- Drain coolant, and live both radiator and engine block drain plugs
open
- Disconnect hoses from the carb (for choke operation), plug one of
them, and connect garden hose to other
- After a while plug other carb hose, and connect garden hose to first
one
- After a while put a garden hose into radiator
- Close the plugs, and fill the cooling system with distilled water
- Repeat last step few times
- Fill the cooling system with 3.5 liter of 100% coolant (total
capacity is 7 liter), and fill it up with distilled water.

And that should be it. Any comments?


--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **

Yvan wrote:
> Nedavno Yvan pise:
>
> | But my main question was how to flush cooling system on my BMW. Anyone
> | with suggestions?
>
> Hire is what I thought:
>
> - Turn heater knob on dash to hot.
> - Drain coolant, and live both radiator and engine block drain plugs
> open
> - Disconnect hoses from the carb (for choke operation), plug one of
> them, and connect garden hose to other
> - After a while plug other carb hose, and connect garden hose to first
> one
> - After a while put a garden hose into radiator
> - Close the plugs, and fill the cooling system with distilled water
> - Repeat last step few times
> - Fill the cooling system with 3.5 liter of 100% coolant (total
> capacity is 7 liter), and fill it up with distilled water.
>
> And that should be it. Any comments?
>
>
> --
> ___ ____
> /__/ / \ ** Registrovani korisnik Linuksa #291606 **
> / / \/ /\ \ ** Registered Linux user #291606 **
> /__/\____/--\__\ ** http://counter.li.org/ **

This is what I used to do. But it's now illegal to let any coolant or
the rinse water run onto the ground and into the storm drain. So now I
just pay my mechanic to flush it with that pressurized machine that he
uses.

Nedavno Rhaspun piše:

| This is what I used to do. But it's now illegal to let any coolant or
| the rinse water run onto the ground and into the storm drain. So now I
| just pay my mechanic to flush it with that pressurized machine that he
| uses.


Unfortunately where I am there are no such laws, and everyone disposes
coolant the way he wants including mechanics. Usually it goes down the
drain (as far as I knew). I will ask around if I can dispose of coolant
safe way.

Thanks for your comment. Its is good to knew that I found the right way
to flush, I will do it as soon as I this "Siberian" cold wave goes away.

--
___ ____
/__/ / \ ** Registrovani korisnik Linuksa #291606 **
/ / \/ /\ \ ** Registered Linux user #291606 **
/__/\____/--\__\ ** http://counter.li.org/ **

Do a little research and you might find that coolant is really not an
environmental hazard. After a few days it is usually broken down by
organisms in the soil or sewer systems. They spray essentially the same
stuff on airplanes to de-ice all the time. The environmental effects have
been negligible.

I asked the question of a friend at an environmental agency a few years
back. The response, after a little research, was just to flush it down the
sewer system. True, some places won't allow this, but it may be an
over-reaction to the potential dangers. There may also be other additives
in newer formulations that may be a problem. This I don't know. The EG is
only a short term danger to any animals or humans that might ingest it.

Leonard

"Yvan" > wrote in message
news:20060127095311.76d9dc02@localhost...
> Nedavno Rhaspun pise:
>
> | This is what I used to do. But it's now illegal to let any coolant or
> | the rinse water run onto the ground and into the storm drain. So now I
> | just pay my mechanic to flush it with that pressurized machine that he
> | uses.
>
>
> Unfortunately where I am there are no such laws, and everyone disposes
> coolant the way he wants including mechanics. Usually it goes down the
> drain (as far as I knew). I will ask around if I can dispose of coolant
> safe way.
>
> Thanks for your comment. Its is good to knew that I found the right way
> to flush, I will do it as soon as I this "Siberian" cold wave goes away.
>
> --
> ___ ____
> /__/ / \ ** Registrovani korisnik Linuksa #291606 **
> / / \/ /\ \ ** Registered Linux user #291606 **
> /__/\____/--\__\ ** http://counter.li.org/ **

Leonard Caillouet wrote:
> Do a little research and you might find that coolant is really not an
> environmental hazard. After a few days it is usually broken down by
> organisms in the soil or sewer systems. They spray essentially the same
> stuff on airplanes to de-ice all the time. The environmental effects have
> been negligible.
<snip>
>There may also be other additives
> in newer formulations that may be a problem.
<snip>

You have identified the problem in the second excerpt, but you minimize
it. Manufacturers of airplane deicing fluid do not make their recipes
public - yes, it's mainly ethylene and propylene glycol, but there's a
bunch of other stuff in there too. The airport in Toronto, Canada, has
spent millions on a deicing facility that recycles the fluid instead of
allowing it to go straight into the groundwater. They would not do this
if it was harmless.

The same problem exists in automobile coolant- the recipes are top
seekrit and the consumer and municipality has no idea what they're
dumping into the sewer, which in most places goes with minimal treatment
into the surface water.

Nobody Important wrote:

> Leonard Caillouet wrote:
>
>> Do a little research and you might find that coolant is really not an
>> environmental hazard. After a few days it is usually broken down by
>> organisms in the soil or sewer systems. They spray essentially the
>> same stuff on airplanes to de-ice all the time. The environmental
>> effects have been negligible.
>
> <snip>
>
>> There may also be other additives in newer formulations that may be a
>> problem.
>
> <snip>
>
> You have identified the problem in the second excerpt, but you
> minimize it. Manufacturers of airplane deicing fluid do not make
> their recipes public - yes, it's mainly ethylene and propylene glycol,
> but there's a bunch of other stuff in there too. The airport in
> Toronto, Canada, has spent millions on a deicing facility that
> recycles the fluid instead of allowing it to go straight into the
> groundwater. They would not do this if it was harmless.
>
> The same problem exists in automobile coolant- the recipes are top
> seekrit and the consumer and municipality has no idea what they're
> dumping into the sewer, which in most places goes with minimal
> treatment into the surface water.
>
Aircraft deicing fluid is VERY TOXIC, Ottawa Canada's airport also
spent millions building an aircraft deicing center to recover the
fluid, even if the aircraft are deiced on the gate a vacuum truck
appears minutes after push back to remove the fluid. If a dog or cat
drinks the fluid it will die within 24 hours of kidney failure. DO NOT
leave an open container of this fluid in a place where animals can get
to it as it will KILL them.

"FFF" > wrote in message
.. .
> Nobody Important wrote:
>
>> Leonard Caillouet wrote:
>>
>>> Do a little research and you might find that coolant is really not an
>>> environmental hazard. After a few days it is usually broken down by
>>> organisms in the soil or sewer systems. They spray essentially the same
>>> stuff on airplanes to de-ice all the time. The environmental effects
>>> have been negligible.
>>
>> <snip>
>>
>>> There may also be other additives in newer formulations that may be a
>>> problem.
>>
>> <snip>
>>
>> You have identified the problem in the second excerpt, but you minimize
>> it. Manufacturers of airplane deicing fluid do not make their recipes
>> public - yes, it's mainly ethylene and propylene glycol, but there's a
>> bunch of other stuff in there too. The airport in Toronto, Canada, has
>> spent millions on a deicing facility that recycles the fluid instead of
>> allowing it to go straight into the groundwater. They would not do this
>> if it was harmless.
>>
>> The same problem exists in automobile coolant- the recipes are top
>> seekrit and the consumer and municipality has no idea what they're
>> dumping into the sewer, which in most places goes with minimal treatment
>> into the surface water.
>>
> Aircraft deicing fluid is VERY TOXIC, Ottawa Canada's airport also spent
> millions building an aircraft deicing center to recover the fluid, even
> if the aircraft are deiced on the gate a vacuum truck appears minutes
> after push back to remove the fluid. If a dog or cat drinks the fluid it
> will die within 24 hours of kidney failure. DO NOT leave an open
> container of this fluid in a place where animals can get to it as it will
> KILL them.

No doubt ethylene glycol is toxic. That was not the point. The point is
that it it is broken down by organisms in soil and sewer systems within a
couple of days in most cases. Many airports do not recycle the fluid.

Certainly, it is best to recycle it and one should be aware of local
requirements. The point is that one should also not get in a panic if it
gets flushed down the toilet.

See the link

http://www.inchem.org/documents/cica...m#PartNumber:1
which uses these references:


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