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Do bubbles really mean head gasket trouble?
Posted 10 January 2005 - 03:01 AM
Posted 10 January 2005 - 07:50 AM
Posted 10 January 2005 - 11:23 AM
Search for "coolant replacement" on this site, I have shared my best method for having as little air as possible.
Posted 10 January 2005 - 11:26 AM
I still get the bubbles tho. What worries me is the black scum/flakes (carbon?). Not seeing any oil, but I'm concerned that it might be a gasket.
I get the bubbles on my other roo, but no carbon.
Posted 10 January 2005 - 12:50 PM
Posted 10 January 2005 - 03:20 PM
To check for headgasket problems I would have a block done. It is not very expensive to do.
Posted 10 January 2005 - 07:32 PM
Check it the same way all the time and you will get an idea how much yours should change while normal. You can also have a little scum show up and not have a gasket about to pop. There can be all kinds of ugly chemical reactions in an old motor if it has had different kinks of antifreeze.
All cars are not equal. If you are running a very hot thermostat and your radiator is old and not as effective as new you are borderline on boiling.
When the water expands inside your radiator it will be forced into the coolant recovery tank. If it is borderline under pressure it can boil when it hits the open air causeing bubbles. Then if it cools down and sucks back in things are fine.
But if you overheat and have a steady stream of bubbles or if you get that thick brown goo...watch out.
By overheat I mean the engine boils over, not the gauge goes up in heavy useage. The guage should go up a bit in heavy use on an old engine.
Posted 10 January 2005 - 07:41 PM
I had the black-brown goo forming inside my recovery tank that Cookie describes. My engine never boiled over that I know of (I had just bought it used), it just "puked" coolant out of my recovery tank and my temp gauge spiked. I couldn't detect the smell of exhaust, but had the bubbles after an extended drive.
Posted 10 January 2005 - 08:01 PM
Posted 10 January 2005 - 10:18 PM
Posted 11 January 2005 - 02:15 AM
Clutchbob: Classic HG problem. There is a tiny leak of compression and exhaust gas into the coolant system.
Posted 11 January 2005 - 11:21 PM
Posted 11 January 2005 - 11:31 PM
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