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Old 02-23-2008, 03:21 PM   #1
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Default Coolant recovery container

Just bought a '05 Bonne and noticed the recovery container being dirty on the inside. Only have 30k miles on it. Any reason for it being dirty?
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Old 02-23-2008, 03:33 PM   #2
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Default Re: Coolant recovery container

Quote:
Originally Posted by boott
Just bought a '05 Bonne and noticed the recovery container being dirty on the inside. Only have 30k miles on it. Any reason for it being dirty?
I can't see what kind of stuff you're seeing that looks like dirt. If it'* a simple brownish film that is probably the sealer that GM put into the motor at the factory or in some cases it was put in as a part of a recall in which they changed mount bolts on the throttle body and added the pellets with the sealer. They're made of an organic material ground finely, such as walnut shells--I can't remember the main material. In earlier models they didn't put in the sealer and recalled the cars and did it.

If it'* a sludgey, oily looking materal, it can be contaminated DexCool. Even though DexCool was said to last for 5 years or 100000+ miles, it should be changed at 2-3 years or 36000 miles just like the green stuff. Some will say remove the DexCool but it'* best for the aluminum components. The formula was changed slightly after earlier cars in 1999 or so developed seeps around UIM seals allegedly because the seal material changed due to a preservative in original DexCool formula. I use DexCool in both of mine.

You can disconnect the hose from the reservoir, remove either 1 or two small bolts holding it and then wash it with detergent and a bottle brush or anything to clean off the interior sides. Add 50/50 DexCool and you're back in business with a clean-looking bottle.
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Old 02-23-2008, 04:03 PM   #3
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a new coolant bottle is only $12 from the dealer...
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Old 02-23-2008, 11:12 PM   #4
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I take mine off every year and clean in out.
Since it is the high point in the system, it will collect all the crud.
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