Coolant burping funnel, how long should it take
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Joined: Sep 2009
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From: GB
Coolant burping funnel, how long should it take
So I replaced my radiator as my original one had a slow leak on the plastic bottom frame. The coolant in my overflow bottle would gradually go down and if it goes down too much I used to hear water noise in the cabin that's how I knew bottle went low. Anyway, so I changed the radiator with new one and replaced the 4 constant tension clips with brand new OEM clips. I connected up the burping funnel to the pressure cap area and filled coolant up to about a quarter way up in the funnel. Then I turned car on and turned A/C off via the climate screen and put temperature to HI and fan speed to HI too. Ran the car like this for almost an hour. In the beginning lots of bubbles were coming out. It took about 40minutes or so for the thermostat to open up and the lower radiator hose to start getting warm. At which point more bubbles came. But for some reason I feel like the bubbles don't stop. If idling it looks like bubbles have stopped then if i REV it up to 2K or 2.5K then bubbles come again. There is no visible leak anymore. I will try and do a pressure test in the next few days. Am I doing something wrong? where are these bubbles coming from? Do I need to rev it for much longer periods rather than letting car idle?
If you changed the radiator it will have a lot of trapped air. It takes around 30 min - 1hr. What I do I wait till the thermostat opens a few times maybe 3 or so. While it's circulation rev, and hold the rpms. Probably around 1500-2000 rpms is good. Once fans stop I hold revs a few times to same rpms above until it opens up again.
After that let it idle 2 fan cycles. Watch the water in the funnel it should be still with no bubbles in it. At this point I cover up the funnel with the lid until the engine is cold. Disconnect the hood shocks, and prop the hood. It will be awhile till it cools down.
After that let it idle 2 fan cycles. Watch the water in the funnel it should be still with no bubbles in it. At this point I cover up the funnel with the lid until the engine is cold. Disconnect the hood shocks, and prop the hood. It will be awhile till it cools down.
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Joined: Sep 2009
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From: GB
If you changed the radiator it will have a lot of trapped air. It takes around 30 min - 1hr. What I do I wait till the thermostat opens a few times maybe 3 or so. While it's circulation rev, and hold the rpms. Probably around 1500-2000 rpms is good. Once fans stop I hold revs a few times to same rpms above until it opens up again.
After that let it idle 2 fan cycles. Watch the water in the funnel it should be still with no bubbles in it. At this point I cover up the funnel with the lid until the engine is cold. Disconnect the hood shocks, and prop the hood. It will be awhile till it cools down.
After that let it idle 2 fan cycles. Watch the water in the funnel it should be still with no bubbles in it. At this point I cover up the funnel with the lid until the engine is cold. Disconnect the hood shocks, and prop the hood. It will be awhile till it cools down.
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Joined: Sep 2010
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From: Alberta
Turn the HVAC fan off you're sinking heat away from the engine making the thermostat cycle slower. It is impossible not to see bubbles in my experience cavitation causes them, also coolant being near or at boiling point.
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