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Discussion Starter · #1 ·
Hi everyone,

I've recently become the custodian of a 2004 9-5 Saab (girlfriend's car lol) and just replaced a lower engine coolant hose. Is the system "self-burping"? After installing the hose, I filled the expansion tank with coolant, let the engine run for a bit, and saw air bubbles coming out of the expansion tank. Is it sufficient?

Moreover, I've been hearing water "swirling" behind the dashboard. Is it a related issue?

Thank you for your help! It's my "first" Saab, and I am trying to take good care of it.
 

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Probably still air in the system. Usually a quick drive (long enough for the thermostat to open) is sufficient to get all the air into the reservoir... let it cool down, and top it off.
 

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Discussion Starter · #5 ·
Probably still air in the system. Usually a quick drive (long enough for the thermostat to open) is sufficient to get all the air into the reservoir... let it cool down, and top it off.
Thank your for your reply! After adding coolant and taking the car for a drive, a "low coolant alarm" came up, so I added more, and it seems fine now.
 

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After changing the coolant, I always take my car for a drive and bring a gallon of pre-mixed coolant with me. Without fail, when the car's all warmed up, the expansion tank will drain into the engine or radiator, so I pull over and top it up.
 

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No matter how full you fill it while it's cold, as soon as the thermostat opens the coolant level drops a lot. After running for even a minute with the thermostat open, air pockets should be out of the system. Top up to the "KALT" level (at the halfway mark), screw on the cap, and check again after a good long drive, or a few lesser drives. Fine tune the level, and then if it's not leaking anywhere, the level should stay there, well, almost forever.
 

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2005 Saab 9-5 Aero Sedan '98 corolla until my 9-5's engine is finished:'~((
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You can squeeze the hoses to help and things - I'm not sure if these have a valve that one can open to allow any air to escape like systems on other cars but as others have said just drive and top it off - it'll burp itself indeed. For me I've had it take a handful of drives (18+ miles each) before it fully burps. Nothing wrong with it either, so continue to check the level up to at least a week and don't be surprised if it still gets a little low by then
 

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2005 Saab 9-5 Aero Sedan '98 corolla until my 9-5's engine is finished:'~((
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There is a valve on the coolant expansion tank cap.
That location won't effectively remove air from the system unless it's already burped its way to the tank. Usually they're in a location where they'll spray coolant if there's not air. The cap valve is just to relieve excess pressure should it build
 
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