what causes coolant bubbling when cold... vid inside.
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what causes coolant bubbling when cold... vid inside.
Anyone have an idea what causes bubbles in the overflow bottle? (cold and hot) .
https://vimeo.com/99294474
Edit : It does it with the cap securely fastened too lol...
https://vimeo.com/99294474
Edit : It does it with the cap securely fastened too lol...
Burning Brakes
Joined: Jul 2011
Posts: 1,097
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From: Fredericksburg Virginia
Ok, have you pressurized the system to see if it holds pressure? Does it overheat at all? Is it full on the tank? Have you overfilled it to see what it does? How long has it been doing it?
Chris
Chris
Melting Slicks
Joined: Jul 2012
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Drifting
Joined: Sep 2003
Posts: 1,726
Likes: 18
From: Brighton, MI
Anyone have an idea what causes bubbles in the overflow bottle? (cold and hot) .
https://vimeo.com/99294474
Edit : It does it with the cap securely fastened too lol...
https://vimeo.com/99294474
Edit : It does it with the cap securely fastened too lol...
this could also be the water flowing to the reservoir. Fill it completely and see if it spews out at 2000rpms.
Melting Slicks
Joined: Jun 2012
Posts: 3,163
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From: Oceanside California
It's possible the system was never bled right. IE cap at the highest point, heater running to get the air out of the heater core, brought up to operating temp where the thermostat opens and drops the level, then toped off and capped.
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Drifting
Joined: Sep 2003
Posts: 1,726
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From: Brighton, MI
system needs to be bled. It is really really uncommon for these head gaskets to push exhaust gases to the cooling system, often times its the other way around, coolant gets in. When it does, its usually huge and white smoke can be seen on the rear.
Bleed it correctly first...
Melting Slicks
Joined: Jul 2012
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If exhaust gases are being pushed through the head gasket, it will
only occur during engine operation. The gases will build immediate pressure and temp, exceeding the 15# pressure of the rad cap, and expunge coolant into the overflow bottle. Overheating will occur raptly, depending on the amount of gases entering the system. The coolant will be hot... not cold.
If there is no coolant flow to the overflow, only gases, then there is insufficient coolant to be expunged in the system.
Any breach, i.e. head gasket rupture, in the closed cooling system will negate the siphon occurring at cool-down, and the overflow
bottle will remain full, and the reservoir will be in need of coolant.
Exhaust gases in the cooling system will not appear in the oil, or
as white smoke exiting the exhaust.
only occur during engine operation. The gases will build immediate pressure and temp, exceeding the 15# pressure of the rad cap, and expunge coolant into the overflow bottle. Overheating will occur raptly, depending on the amount of gases entering the system. The coolant will be hot... not cold.
If there is no coolant flow to the overflow, only gases, then there is insufficient coolant to be expunged in the system.
Any breach, i.e. head gasket rupture, in the closed cooling system will negate the siphon occurring at cool-down, and the overflow
bottle will remain full, and the reservoir will be in need of coolant.
Exhaust gases in the cooling system will not appear in the oil, or
as white smoke exiting the exhaust.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
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From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Mine does the same thing, has since for at least a year. This thread has got me thinking though. I bled the system last night, and just picked up the tester from O'Reilly Auto Parts. They have it in the tool loaner program FYI.
Update: I did the test, and no exhaust is present in the coolant system. But my reservoir still does the same thing.
Update: I did the test, and no exhaust is present in the coolant system. But my reservoir still does the same thing.
Last edited by CamminC5; Jul 9, 2014 at 04:29 PM.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
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From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
It is possible that air is leaking into the cooling system through a deformed rad cap gasket, loose or split hose, etc....... if so, the boiling point would be the normal 212 instead of 260+/- achieved with a 15# pressure rad cap, and you may be seeing boiling water in the overflow bottle.
But, any breach of air would negate the siphon..... hot expanded coolant would still flow to the overflow bottle, but at cool-down, coolant would not flow back to the reservoir (siphon).
But, any breach of air would negate the siphon..... hot expanded coolant would still flow to the overflow bottle, but at cool-down, coolant would not flow back to the reservoir (siphon).
Drifting
Joined: Sep 2009
Posts: 1,862
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From: Prescott, Arizona
If a test for combustion gasses in the coolant is negative, I would suspect the water pump seal is compromised. Air can be drawn in past a bad seal, usually decreasing or stopping when the system pressurizes and or the thermostat opens, changing the pump hydraulics.
But I would also think a seal in that condition would also leak coolant.
But I would also think a seal in that condition would also leak coolant.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
If a test for combustion gasses in the coolant is negative, I would suspect the water pump seal is compromised. Air can be drawn in past a bad seal, usually decreasing or stopping when the system pressurizes and or the thermostat opens, changing the pump hydraulics.
But I would also think a seal in that condition would also leak coolant.
But I would also think a seal in that condition would also leak coolant.
Melting Slicks
Joined: Jul 2012
Posts: 2,507
Likes: 9
If a test for combustion gasses in the coolant is negative, I would suspect the water pump seal is compromised. Air can be drawn in past a bad seal, usually decreasing or stopping when the system pressurizes and or the thermostat opens, changing the pump hydraulics.
But I would also think a seal in that condition would also leak coolant.
But I would also think a seal in that condition would also leak coolant.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Pressurized the coolant system to 14 psi with a mityvac. It leaked to 10psi over 8 minutes and the leak slowed to a crawl after that.
I say no leak, no issue, and all is well. Any who oppose speak up.
I say no leak, no issue, and all is well. Any who oppose speak up.
Melting Slicks
Joined: Jul 2012
Posts: 2,507
Likes: 9
That would tend to make me believe a crack in the head that opens with heat causing the issue. I assume your still having this issue?
Melting Slicks
Joined: Jan 2008
Posts: 2,590
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From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
I'll see if I can get around to do a leak down test this weekend. However, I'm still not convinced that a problem exists.