radiator fluid

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Old 20 Nov 2006, 05:43 pm   #1 (permalink)
mrdarrett@gmail.com
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Default radiator fluid

I just changed my front radiator hoses (upper, lower, and some bypass
hose that also ties into the upper hose) on my '96 camry (138k miles).
The lower radiator hose was a real challenge to get clamped back on,
but I finally got it.

I was hoping to also do the heater core hoses, but I just didn't have
enough time - plus, I'd have to remove the air intake hose, etc.

Since the car needed a coolant change anyway, and since I was just
planning on waiting until I get time to do the rear hoses, I filled up
with Prestone antifreeze - the type that says it's compatible with any
type of antifreeze.

Now, I know that just about everyone here advocates using the Toyota
Red, and yes I have a jug of it waiting for when I drain and refill to
do the rear heater core hoses.

Now, I'm curious. Exactly how dangerous is it to use Prestone coolant?
The ingredients made no mention of silicates (which I've heard damage
the water pump seals).

Basically, I'm wondering if I should hurry up and re-do the coolant
ASAP to flush out the Prestone, or whether I can safely wait until next
year (and enjoy the green Prestone currently in the radiator).

Thanks,

Michael

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Old 21 Nov 2006, 08:40 am   #2 (permalink)
Daniel
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Default Re: radiator fluid

mrdarrett@gmail.com wrote:
>

whether I can safely wait until next
> year (and enjoy the green Prestone currently in the radiator).

============================
Adverse effects appear over a period of time but are not easily
reversed.
Depends on how you care for your car.
I ran Prestone green in my Toyota truck for years with water from the
garden hose - and it is a 1977 truck which still runs fine.
However, since I've owned it I've been through three water pumps and as
many radiators and there is a calcified grunge around the bimetallic
choke coil that I don't know how to correct.
Last time I changed the water pump I saw a white crusty residue growing
on the tops of the radiator tubes beginning to cover the openings.
Now on the Camry, which has always had Toyota coolant and distilled
water the cooling system is still like new.
Probably shouldn't have listened to the nice guy at the radiator shop.
He told me with the small amount of water distilled is not necessary.
Plus the truck has always run hot. It's an old truck and when I asked
him how to fix it, he answered "buy a newer truck." When I used to
drive long distances in summer, going up hills with the air
conditioning on, I would have to reduce speed to keep the temperature
gauge from climbing too high.
With the Camry the gauge never moves off just below mid point
regardless of driving conditions.
Last time I changed the truck's water pump I switched to Toyota coolant
and distilled water plus a new thermostat. Now for the first time the
gauge reads right at mid point. This was also the first time I used a
Toyota water pump.
Trying to get all the old stuff out I drained and refilled three times
after changing the water pump and thermostat.
It's not like you're going to calcify the coolant passages and begin
overheating right away, it will take some time to degrade - but the
process will begin.

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Old 21 Nov 2006, 10:46 am   #3 (permalink)
Stubby
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Default Re: radiator fluid



mrdarrett@gmail.com wrote:
>...
> Now, I'm curious. Exactly how dangerous is it to use Prestone coolant?
> The ingredients made no mention of silicates (which I've heard damage
> the water pump seals).


Prestone has been around for many years, at least 40 that I know of. I
find it hard to believe that it is damaging seals in millions of cars.

Can you cite a reference from Toyota (web, manual, ...) that says
Prestone is harmful? What about the Prestone web site -- is there
anything warning about it being incompatible with Toyotas?
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Old 21 Nov 2006, 11:26 am   #4 (permalink)
mrdarrett@gmail.com
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Default Re: radiator fluid


Stubby wrote:
> mrdarrett@gmail.com wrote:
> >...
> > Now, I'm curious. Exactly how dangerous is it to use Prestone coolant?
> > The ingredients made no mention of silicates (which I've heard damage
> > the water pump seals).

>
> Prestone has been around for many years, at least 40 that I know of. I
> find it hard to believe that it is damaging seals in millions of cars.
>
> Can you cite a reference from Toyota (web, manual, ...) that says
> Prestone is harmful? What about the Prestone web site -- is there
> anything warning about it being incompatible with Toyotas?



Just the propaganda from Toyota, and from reading this newsgroup.

http://www.toyotaownersonline.com/pa...part=chemicals

"Genuine Toyota Super Long-Life Antifreeze/Coolant is the same high
quality, factory-fill product found in new Toyotas. You'll know it by
its distinctive pink color. It provides maximum protection and
durability without the use of harmful silicates. And because it's
compatible with non-metallic materials, it helps extend the life of
water-pump seals. Don't trust your engine to anything less than the
best: Genuine Toyota Super Long-Life Antifreeze/Coolant."

So, is Prestone low-silicate, or silicate-free? No silicon of any type
appears in the list of ingredients.

FWIW, I called the local Toyota dealership to ask if they use distilled
water or tap water for their coolant changes. They use tap water.

Michael

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Old 21 Nov 2006, 04:24 pm   #5 (permalink)
m Ransley
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Default Re: radiator fluid

I think the problem is not using distilled water.

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Old 21 Nov 2006, 06:48 pm   #6 (permalink)
mrdarrett@gmail.com
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Default Re: radiator fluid


Daniel wrote:
> mrdarrett@gmail.com wrote:
> >

> whether I can safely wait until next
> > year (and enjoy the green Prestone currently in the radiator).

> ============================
> Adverse effects appear over a period of time but are not easily
> reversed.
> Depends on how you care for your car.
> I ran Prestone green in my Toyota truck for years with water from the
> garden hose - and it is a 1977 truck which still runs fine.
> However, since I've owned it I've been through three water pumps and as
> many radiators and there is a calcified grunge around the bimetallic
> choke coil that I don't know how to correct.



Where is the bimetallic choke coil, exactly? Maybe try a solution of
vinegar and water...?

(just a suggestion; I'm not responsible for any liability, damages, or
injuries for acting on that suggestion...)

Michael

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