What to Do: '95 Camry Four with Green Coolant

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Old 26 Sep 2009, 04:01 pm   #1 (permalink)
Leftie
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Default What to Do: '95 Camry Four with Green Coolant

We had the water pump and timing belt done on our '95 wagon last
year. The parts were aftermarket, not Toyota, but we asked for Toyota
coolant. Now it appears they used the regular green stuff. The car is
behaving ok, but the reservoir is nearly empty (this *may* be normal
evaporation) and there is a red scum in the reservoir. Do we have it
power flushed with the original radiator still there, or not? Red
coolant or green?
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Old 26 Sep 2009, 04:46 pm   #2 (permalink)
dsi1
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Default Re: What to Do: '95 Camry Four with Green Coolant

Leftie wrote:
> We had the water pump and timing belt done on our '95 wagon last
> year. The parts were aftermarket, not Toyota, but we asked for Toyota
> coolant. Now it appears they used the regular green stuff. The car is
> behaving ok, but the reservoir is nearly empty (this *may* be normal
> evaporation) and there is a red scum in the reservoir. Do we have it
> power flushed with the original radiator still there, or not? Red
> coolant or green?


Red coolant or green won't make much of any difference in your life -
just make sure you don't run it on plain old water. Your more important
question is why you have scum in the reservoir. My recommendation is
that you use any color coolant you want to - if you can't decide, flip a
coin - just make sure you monitor the scum in the reservoir. Of course,
you should also clean out the reservoir as much as you can before your
refill. Good luck!
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Old 26 Sep 2009, 08:45 pm   #3 (permalink)
Leftie
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Default Re: What to Do: '95 Camry Four with Green Coolant

dsi1 wrote:
> Leftie wrote:
>> We had the water pump and timing belt done on our '95 wagon last
>> year. The parts were aftermarket, not Toyota, but we asked for Toyota
>> coolant. Now it appears they used the regular green stuff. The car is
>> behaving ok, but the reservoir is nearly empty (this *may* be normal
>> evaporation) and there is a red scum in the reservoir. Do we have it
>> power flushed with the original radiator still there, or not? Red
>> coolant or green?

>
> Red coolant or green won't make much of any difference in your life -
> just make sure you don't run it on plain old water. Your more important
> question is why you have scum in the reservoir. My recommendation is
> that you use any color coolant you want to - if you can't decide, flip a
> coin - just make sure you monitor the scum in the reservoir. Of course,
> you should also clean out the reservoir as much as you can before your
> refill. Good luck!



I'm concerned that the red scum is from the (hopefully) small amount
of Toyota coolant left in the system reacting with the new, green
coolant. I want to know if this is likely, and how safe a flush would be
as opposed to a drain and fill. I don't want to 'kill' the radiator or
heater core.
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Old 26 Sep 2009, 09:29 pm   #4 (permalink)
dsi1
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Default Re: What to Do: '95 Camry Four with Green Coolant

Leftie wrote:
> dsi1 wrote:
>> Leftie wrote:
>>> We had the water pump and timing belt done on our '95 wagon last
>>> year. The parts were aftermarket, not Toyota, but we asked for Toyota
>>> coolant. Now it appears they used the regular green stuff. The car is
>>> behaving ok, but the reservoir is nearly empty (this *may* be normal
>>> evaporation) and there is a red scum in the reservoir. Do we have it
>>> power flushed with the original radiator still there, or not? Red
>>> coolant or green?

>>
>> Red coolant or green won't make much of any difference in your life -
>> just make sure you don't run it on plain old water. Your more
>> important question is why you have scum in the reservoir. My
>> recommendation is that you use any color coolant you want to - if you
>> can't decide, flip a coin - just make sure you monitor the scum in the
>> reservoir. Of course, you should also clean out the reservoir as much
>> as you can before your refill. Good luck!

>
>
> I'm concerned that the red scum is from the (hopefully) small amount
> of Toyota coolant left in the system reacting with the new, green
> coolant. I want to know if this is likely, and how safe a flush would be
> as opposed to a drain and fill. I don't want to 'kill' the radiator or
> heater core.


I've never heard of different colors and types of AF creating scum but
there's a lot of stuff I've never heard of. Anyway, if you're concerned
about mixing different types of AF you should refill it with the same
regular green stuff. I personally don't like the idea of messing with
caustic flushes and powering out sediments for fear of causing leaks - I
think a lot of old car guys think like this although maybe we're just
being superstitious. :-)
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Old 27 Sep 2009, 04:11 am   #5 (permalink)
dsi1
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Default Re: What to Do: '95 Camry Four with Green Coolant

Leftie wrote:

> I appreciate your willingness to respond, but this is really a
> question for the more knowledgeable people here - especially the techs.
> The red Toyota AF has a different formulation than the usual green stuff.


I'd sure be interested to know if green and red AF makes sludge too -
hopefully, someone will know. My bet however, is that your sludge is
caused the old fashioned way - an internal engine leak.
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Old 27 Sep 2009, 04:16 am   #6 (permalink)
Leftie
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Default Re: What to Do: '95 Camry Four with Green Coolant

dsi1 wrote:
> Leftie wrote:
>> dsi1 wrote:
>>> Leftie wrote:
>>>> We had the water pump and timing belt done on our '95 wagon last
>>>> year. The parts were aftermarket, not Toyota, but we asked for
>>>> Toyota coolant. Now it appears they used the regular green stuff.
>>>> The car is behaving ok, but the reservoir is nearly empty (this
>>>> *may* be normal evaporation) and there is a red scum in the
>>>> reservoir. Do we have it power flushed with the original radiator
>>>> still there, or not? Red coolant or green?
>>>
>>> Red coolant or green won't make much of any difference in your life -
>>> just make sure you don't run it on plain old water. Your more
>>> important question is why you have scum in the reservoir. My
>>> recommendation is that you use any color coolant you want to - if you
>>> can't decide, flip a coin - just make sure you monitor the scum in
>>> the reservoir. Of course, you should also clean out the reservoir as
>>> much as you can before your refill. Good luck!

>>
>>
>> I'm concerned that the red scum is from the (hopefully) small
>> amount of Toyota coolant left in the system reacting with the new,
>> green coolant. I want to know if this is likely, and how safe a flush
>> would be as opposed to a drain and fill. I don't want to 'kill' the
>> radiator or heater core.

>
> I've never heard of different colors and types of AF creating scum but
> there's a lot of stuff I've never heard of. Anyway, if you're concerned
> about mixing different types of AF you should refill it with the same
> regular green stuff. I personally don't like the idea of messing with
> caustic flushes and powering out sediments for fear of causing leaks - I
> think a lot of old car guys think like this although maybe we're just
> being superstitious. :-)



I appreciate your willingness to respond, but this is really a
question for the more knowledgeable people here - especially the techs.
The red Toyota AF has a different formulation than the usual green stuff.
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Old 27 Sep 2009, 12:43 pm   #7 (permalink)
hls
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Default Re: What to Do: '95 Camry Four with Green Coolant


"Leftie" <No@Thanks.net> wrote in message
news:tuuvm.230594$0e4.144498@newsfe19.iad...
> We had the water pump and timing belt done on our '95 wagon last year.
> The parts were aftermarket, not Toyota, but we asked for Toyota coolant.
> Now it appears they used the regular green stuff. The car is behaving ok,
> but the reservoir is nearly empty (this *may* be normal evaporation) and
> there is a red scum in the reservoir. Do we have it power flushed with the
> original radiator still there, or not? Red coolant or green?


Red scum is usually caused by iron rust and /or oil in the system.

IMO, the bruhaha about most antifreeze packages is highly overblown.
The auto companies are not using many new alloys in their products, and
the old green material did a pretty good job - in some cases better than the
OAT technology.

OAT technology deleted some or all of the silicate used in previous
formulations
which were there to protect the aluminum castings. OAT (Organic Acid
Technology) did not adequately address this in some formulations, IMO.

As mentioned before, if you drain the block and rinse it out, refill with a
good grade coolant (antifreeze package) mixed into distilled water.

NEVER let the reservoir go dry. If you do that, you can suck air into the
engine when it cools....Keep it appropriately topped up with distilled water
and coolant.

You might have a leak somewhere (water pump, radiator, hose welch plugs,
etc), or a leaking head gasket or cracked head is not impossible. That
reservoir
getting low is a bit troubling. Usually evaporation is slow, compared to
how often you OUGHT to be checking the levels.

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Old 27 Sep 2009, 04:42 pm   #8 (permalink)
Jason James
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Default Re: What to Do: '95 Camry Four with Green Coolant


"Leftie" <No@Thanks.net> wrote in message
news:tuuvm.230594$0e4.144498@newsfe19.iad...
> We had the water pump and timing belt done on our '95 wagon last year.
> The parts were aftermarket, not Toyota, but we asked for Toyota coolant.
> Now it appears they used the regular green stuff. The car is behaving ok,
> but the reservoir is nearly empty (this *may* be normal evaporation)


Fill it to the required level and monitor it. Their is probably a small
weepage amongst one of the hoses. Make sure any worm-drive hose-clips are
tight, if the leak is on a hose that has a spring-clip, then the alloy
engine fitting may have corrosian denying a clean smooth surface for the
hose to seal on. Replace spring-clips with worm-drive ones. If it still uses
coolant, then a slow headgasket leak could be indicated. A quality stop-leak
used *as directed* can work here.


and there is a red scum in the reservoir. Do we have it
> power flushed with the original radiator still there, or not? Red coolant
> or green?


Power flushing and active scourers are a bad idea IMHO. Any dislodged rust
just collects in the finer water-passages and radiator. If you must, dont do
it with the radiator in circuit,..it will just block-up. Reverse-flush the
rad by putting a hose in the top hole and allowing the bottom hole to drain.

Jason


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Old 27 Sep 2009, 05:45 pm   #9 (permalink)
Jason James
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Default Re: What to Do: '95 Camry Four with Green Coolant


"Leftie" <No@Thanks.net> wrote in message
news:RpRvm.208560$sC1.87354@newsfe17.iad...
> Jason James wrote:
>> "Leftie" <No@Thanks.net> wrote in message
>> news:tuuvm.230594$0e4.144498@newsfe19.iad...
>>> We had the water pump and timing belt done on our '95 wagon last
>>> year. The parts were aftermarket, not Toyota, but we asked for Toyota
>>> coolant. Now it appears they used the regular green stuff. The car is
>>> behaving ok, but the reservoir is nearly empty (this *may* be normal
>>> evaporation)

>>
>> Fill it to the required level and monitor it. Their is probably a small
>> weepage amongst one of the hoses. Make sure any worm-drive hose-clips are
>> tight, if the leak is on a hose that has a spring-clip, then the alloy
>> engine fitting may have corrosian denying a clean smooth surface for the
>> hose to seal on. Replace spring-clips with worm-drive ones. If it still
>> uses coolant, then a slow headgasket leak could be indicated. A quality
>> stop-leak used *as directed* can work here.
>>
>>
>> and there is a red scum in the reservoir. Do we have it
>>> power flushed with the original radiator still there, or not? Red
>>> coolant or green?

>>
>> Power flushing and active scourers are a bad idea IMHO. Any dislodged
>> rust just collects in the finer water-passages and radiator. If you must,
>> dont do it with the radiator in circuit,..it will just block-up.
>> Reverse-flush the rad by putting a hose in the top hole and allowing the
>> bottom hole to drain.
>>
>> Jason
>>
>>

>
> I'm not inclined to have the radiator flushed at all. It seems unlikely
> that the head gasket is leaking: the car gets light use (which is why the
> reservoir wasn't checked recently) and has not overheated. I'm concerned
> that maybe the "new" water pump may be leaking, and I'm concerned about
> the red scum. Which, BTW, is the same color as Toyota coolant...
>
> So, Toyota techs and hardcore shade tree mechanics: is it safe to leave
> the green coolant in, and add more after cleaning the reservoir? Is the
> Toyota water pump the only reason the red coolant was used?


Check this site out:

http://wiki.seloc.org/a/Coolant

If the 2 coolants you're referring to, both use Glycol as the major
ingredient, mixing *may* be OK. Try and find-out which one the mechanic was
using compared to the Toyota stuff.

Jason


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Old 27 Sep 2009, 06:06 pm   #10 (permalink)
Leftie
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Default Re: What to Do: '95 Camry Four with Green Coolant

Jason James wrote:
> "Leftie" <No@Thanks.net> wrote in message
> news:tuuvm.230594$0e4.144498@newsfe19.iad...
>> We had the water pump and timing belt done on our '95 wagon last year.
>> The parts were aftermarket, not Toyota, but we asked for Toyota coolant.
>> Now it appears they used the regular green stuff. The car is behaving ok,
>> but the reservoir is nearly empty (this *may* be normal evaporation)

>
> Fill it to the required level and monitor it. Their is probably a small
> weepage amongst one of the hoses. Make sure any worm-drive hose-clips are
> tight, if the leak is on a hose that has a spring-clip, then the alloy
> engine fitting may have corrosian denying a clean smooth surface for the
> hose to seal on. Replace spring-clips with worm-drive ones. If it still uses
> coolant, then a slow headgasket leak could be indicated. A quality stop-leak
> used *as directed* can work here.
>
>
> and there is a red scum in the reservoir. Do we have it
>> power flushed with the original radiator still there, or not? Red coolant
>> or green?

>
> Power flushing and active scourers are a bad idea IMHO. Any dislodged rust
> just collects in the finer water-passages and radiator. If you must, dont do
> it with the radiator in circuit,..it will just block-up. Reverse-flush the
> rad by putting a hose in the top hole and allowing the bottom hole to drain.
>
> Jason
>
>


I'm not inclined to have the radiator flushed at all. It seems
unlikely that the head gasket is leaking: the car gets light use (which
is why the reservoir wasn't checked recently) and has not overheated.
I'm concerned that maybe the "new" water pump may be leaking, and I'm
concerned about the red scum. Which, BTW, is the same color as Toyota
coolant...

So, Toyota techs and hardcore shade tree mechanics: is it safe to
leave the green coolant in, and add more after cleaning the reservoir?
Is the Toyota water pump the only reason the red coolant was used?
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