1964 pontiac bonneville rusty antifreeze - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-22-2010, 01:42 PM   #1
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Smile 1964 pontiac bonneville rusty antifreeze

Hello everyone! My name is todd and i have been reading the forum for a while and just singed up. I am the proud owner of a 1964 bonny convertible.heres my problem . I changed the antifreeze twice, drained and flushed the radiator changed thermostat and the antifreeze always turns a rust color.its not oil blow by.could the inside of the motor be rusting? Its just really annoying and i dont know where else to begin to fix the problem, if someone could point me in the right direction it would be appreciated!thanks todd
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Old 01-22-2010, 02:09 PM   #2
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Being such a old engine I'm sure there is some rust. Get a flush kit where you hook a hose and run water threw it as it drains out the other end. Do this with the thermostat removed to ensure a good flow of water. Then drain as much of that out as you can. Then fill with a good, clean mix of water and coolant. See if that helps.
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Old 01-22-2010, 08:16 PM   #3
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Todd,

I've owned many 64 Bonnevilles over the years. They are great carsand one of my favorite Pontiacs. Do as Dan suggested, but I would see if I could find some rust inhibitor (if it is still available) to add after you flush your system out. That way you could refill you system with water and run the car to see if it still turns rusty without spending $30.00 for new antifreeze that is going to turn brown right away.
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Old 02-01-2010, 01:59 PM   #4
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Todd,
Don't flush the motor with any chemical cleaners, they will remove the lubrication from the water pump. Do like the guys above said and flush with water only.. Once it is clean use a 50/50 mix of antifreeze and distilled water...

If your up for it, pull the radiator and thermostat out and flush the cold motor out with hot water...

I always remove the lower radiator hose when changing water/antifreeze..

I love 64 Bonneville'*! Here'* my 64 with a 462 motor and sneaky quite exhaust lol...
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