Foam type brown stuff in radiator - Team Camaro Tech
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post #1 of 4 (permalink) Old Aug 30th, 10, 04:22 AM Thread Starter
 
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Foam type brown stuff in radiator

I have a 69 with a 350 in it and saw the temp rise while crusing down the highway a few weeks ago. I saw on the Vette site about coolant being mixed and think this might be my problem. Except what would be mixed is plain green glycol with the newer green long life of the same brand.
So I bought the Prestone super flush and ran for a few hours over several days. I then flushed and flushed with water. and refilled with new coolant. I ran it to a crusie night and the next day checked it and it had some of the brown stuff again just not to thick.
Now I am wondering if I have maybe a blown head gasket leaking oil ( The oil looks fine on the stick and under the cap ) or if I need to flush again, and if so then the manf. have a different issue then just Dexcool being mixed together.
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post #2 of 4 (permalink) Old Aug 30th, 10, 04:40 AM
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Re: Foam type brown stuff in radiator

You may not have flushed out all the old coolant, as in removing heater core hoses and flushing the core, and dropping the two block plugs and flushing the block, both sides.

I would then replace any hoses over four years old, change thermostat, check it first in a pan of water, new cap, and add either a good brand of green 50/50 premix or mix at home with distilled water a 50/50 mixture.

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post #3 of 4 (permalink) Old Aug 30th, 10, 05:00 AM
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Re: Foam type brown stuff in radiator

You may want to rent a coolant system pressure checker to make sure you don't have a problem with your head gaskets. It's a simple test and will alleviate any fears you may have.

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post #4 of 4 (permalink) Old Aug 30th, 10, 04:48 PM Thread Starter
 
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Re: Foam type brown stuff in radiator

I did pull the heater hose and flushed it good, but I did not do the block plugs; so I will try that and the pressure tester as suggested. Thank you for the help.
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