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Old 04-09-2002, 12:11 PM   #1
Stanley
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2007 Grandpamobile
BlingBlingBlue

Question Observations on coolant flush - normal?

I did some maintenance on my cooling system this past weekend and noticed something I wanted to run by the forum.
When I popped the cap, a large portion of the black paint just inside where the cap sits came off with the cap. I cleaned the opening further with a rag and the rest of the paint flaked right off. What was left was an orange colored metal - looked like iron oxide, but a fairly bright color relative to run of the mill rust.
Is this normal? All other cooling systems I have worked on have the cap on the radiator itself and I have never encountered this before. My father also taught me to reach my finger inside the radiator cap on a used car and if it came back rusty it indicated an aged/improperly maintained cooling system.

Thanks in advance for any insight!
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Old 04-09-2002, 03:54 PM   #2
Stanley
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Talking Talked to Santa Cruz Subaru

Geez - pretty bad that I have to be the first one to reply to my own thread.
I talked with a service guy about this issue and he said that the coolant resevoir is unique to the WRX. It is there to allow coolant to evaporate from turbo into the resevoir, theoretically eliminating the need for a "cool down" procedure. At any rate, he said he has not seen enough of these with any amount of miles to know if it is normal. He wants to take a look at it as well as the timing cover on the driver's side bank of cylinders, which I noticed is seeping a tiny bit of oil.
I'll keep everyone posted. In the mean time, if anyone has done cooling system maintenance on their WRX, feel free to chime in!
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Old 04-09-2002, 04:05 PM   #3
angus
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mine looked exactly as you describe. a thin crusty orange/black film that i peeled off. i was surprised too...it looked like my '81 Cutlas radiator cap. my initial thought was that the factory installed some sort or sealer or protective film...looked like it was peeling off the rubber gasket too? who knows...
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Old 04-09-2002, 04:46 PM   #4
Jademonkey
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...I was just about to say...I saw the same thing on my Buick. I haven't done the coolant on my car yet. I plan on doing dexcool when I hit 30k, which should be any day now.

JM
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Old 04-12-2002, 05:03 AM   #5
crayon
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Quote:
Originally posted by Jademonkey
...I was just about to say...I saw the same thing on my Buick. I haven't done the coolant on my car yet. I plan on doing dexcool when I hit 30k, which should be any day now.

JM
I would NOT do this if I were you. Dexcool isn't compatable with conventional
anti-freeze and there is no way to remove all the existing anti-freeze residue from your cooling system.

Plus there seems to be a great many reports of dexcool destroying the entire cooling system on cars. Even on cars that shipped with dexcool!

Search on the 'net for "dexcool". Scary stuff.

Dexcool in Subaru = No :monkey: way!

Good luck.
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