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Air in Coolant.

 
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  #1 (permalink)  
Old 02 May 2014, 04:18 am
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Default Air in Coolant.

This is a funny one.

We've a 2.0l auto.

The coolant level in the radiator keeps going low. However, the expansion bottle keeps filling up with coolant to the point where it sometimes overflows (onto the exhaust manifold - with a collasal burst of steam)

When I check it in the morning the expansion bottle is always over the high line - however, when I take the radiator cap off - water is needed in there.
I've bled the system - it's recently had a new thermostat and radiator cap.

So, either the water isn't being pulled back into the radiator from the expansions tank - or there's air being introduced from somewhere else.


Anyone had this symptom?

Any suggestions and help would be great - we've not had it long - and the Misses really likes it - but we can't be putting coolant in every 3-4 days - and can't be having the expansion bottle overflowing all the time!


Thanks!
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Old 02 May 2014, 08:29 am
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Default Re: Air in Coolant.

Quote:
Originally Posted by euphonium_john View Post

So, either the water isn't being pulled back into the radiator from the expansions tank -
As I was reading your description, I was thinking of a split hose that goes from radiator to overflow bottle (expansion tank).
I think that is a good place to start.
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Old 02 May 2014, 08:35 am
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Default Re: Air in Coolant.

Hope so - as the other conclusion is slightly more messy!
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Old 02 May 2014, 09:09 am
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Default Re: Air in Coolant.

Quote:
Originally Posted by euphonium_john View Post
Hope so - as the other conclusion is slightly more messy!
And expensive!
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Old 02 May 2014, 09:33 am
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Default Re: Air in Coolant.

air in the line is my guess but you say you bleed the system maybe bleed it again
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Old 02 May 2014, 09:37 am
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Default Re: Air in Coolant.

Air in the line? I'm confused?
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Old 02 May 2014, 09:49 am
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Default Re: Air in Coolant.

im not sure but i knwo you have to bleed the air out of the cooling system our usa 2.4 models or you will ahve all kinds of overheating issues does the slow speen fan kinc on--assume it has the same as ours??
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Old 02 May 2014, 09:50 am
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Default Re: Air in Coolant.

Yeah - I've bled the system and the fans work.....
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Old 02 May 2014, 11:26 am
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Default Re: Air in Coolant.

have someone do a pressure test. that'll show if there's a leak in the system.
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Old 02 May 2014, 03:05 pm
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Default Re: Air in Coolant.

if the head gasket is cracked it will gurgle back inot the resivor
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