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2004 Cadillac CTS 3.6L
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31 Posts
Discussion Starter #1
I have a 2004 cts. Just wondering anyone have air bubbles come out of their coolant resevoir. if so what was the fix
 

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'07 CTS 3.6
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2,937 Posts
Re: Bubbles

New head gaskets.
If you have recently refilled the cooling system, it has to be done under vacuum.
 

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2005 CTS 2.8L
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21 Posts
Re: Bubbles

^ not necessarily. if you don't see oil in the coolant or coolant on the dipstick. if the coolant was low and added some, it may be just the air from the cooling
system burping out.

turn the heater on full with the fan on high. let her run for awhile after getting to operating temp - so the thermostat opens. let the air "burp" out and add coolant
if needed after cooled off.

hope this helps...
 

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2004 Cadillac CTS 3.6L
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31 Posts
Discussion Starter #4
Re: Bubbles

Doesnt seem to be any coolant in the dipstick, or oil in the resevoir. It leaks coolant all the time, and i add water it might have been that it was only water in the system and it got a little hot.
 
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