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  #16  
Old 09-01-2005, 12:53 PM
red95svx
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Quote:
Originally Posted by Dengue
pink stuff? I think mine is orange, is that bad? I put it in with my new radiator over a year ago...

skip

Yeah....like that GM DexCool stuff. Orangy-pinkish. I guess it's not good for our radiators.



Dave
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  #17  
Old 09-01-2005, 01:32 PM
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Quote:
Originally Posted by red95svx
Very funny

Just don't mix the red air with the green air.


Dave

Opps, maybe that's keeping us from being the fastest car around the course. I'm guessing mixing the two causes the stickers on the car to produce less horsepower.
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  #18  
Old 09-01-2005, 09:15 PM
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sperry sperry is offline
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I don't remember the colors, but there are two types of coolant when mixed together can result in a sludge that will kill your motor.

I thought it was the green vs. orange that would turn into sludge. Here's what I could find on but it doesn't mention the sludge.

Quote:
Originally Posted by http://www.aces.edu/dept/extcomm/newspaper/coolant.html
Don't mix the green, silicate-type antifreeze with orange antifreeze, Donald adds. The organic acids in orange types will cause separation of silicates in the green type, which greatly reduces corrosion protection.
However, there was a service bulletin about VW's that's along the lines of what I remember hearing:

http://www.detnews.com/2002/autoscon.../d01-32628.htm

Bottom line is, I just stick to the normal green stuff and distilled water.
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  #19  
Old 10-01-2005, 01:27 PM
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mbtoloczko mbtoloczko is offline
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I've been doing some reading on antifreeze lately. I've found that there are many different formulations, and just as many claims as to why one antifreeze should be used instead of another. In an attempt to make a rational judgement, I went and found what Subaru recommends. Subaru policy is that they recommend an antifreeze that is free of silicates but does contain phosphates. I also found out the Subaru antifreeze does use organic acid technology, but not the same stuff that is found in DexCool (2EH). It seems that the Japanese think that silicates are bad for water pump seals. The phosphate is used because it causes the formation of a film on the aluminum parts that protects the aluminum from erosion. However, I have also read that this film reduces heat transfer into the water (although the source for this info wasn't authoritative). If the film does have this effect, I figure that Subaru probably took into account the reduced heat transfer when designing the cooling system. In the end, I could find no antifreeze that satified Subaru's recommendation except the Subaru OEM antifreeze, so that's what I went with. (Actually, I bought a gallon of antifreeze from the local Toyota dealer because my local Subaru dealer wasn't even aware that Subaru has its own antifreeze formulation. How pathetic.)

I also found out that the "Subaru Cooling System Conditioner" is something to avoid. My parts guy in the Seattle area told me that ever since they started using this stuff, they have been seeing many radiatior failures. red95svx also mentioned the same thing about this stuff in a thread here.

As far as the ratio of antifreeze to water, there are some points here to be kept in mind. Antifreeze does reduce heat transfer efficiency, so less antifreeze is better in that regard, but it does contain necessary anti-corrosion agents. If you go less than 35% antifreeze, it would be good to dump in an anti-corrosion package. Redline Water Wetter would be a good way to go here. Its silicate free, so it satisfies Subaru's recommendation, and as a bonun, Water Wetter actually includes a water pump seal lubricant. At the opposite end of the antifreeze/water ratio, there is nothing to be gained by using more than 50% antifreeze unless its required by your climate.
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Last edited by mbtoloczko; 10-01-2005 at 01:29 PM.
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  #20  
Old 10-01-2005, 01:38 PM
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Chiketkd Chiketkd is offline
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Great info Mychailo!

Per our discussion via PMs, with the n/a mods I'll be installing in the next month or so, I plan on purchasing the PWR aluminum rad and running a 40/60 mix of water/antifreeze w/ redline water wetter.

I'll also get a new bar & fin trans cooler and install it in series with the PWR trans cooler in my inner fender (as opposed to on the radiator where I have it now).

This should hopefully keep both my engine and 4EAT happy with the extra stresses I'll be placing on them!

-Chike
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