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Old 01-07-2013, 11:01 AM   #1
frost12850
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Default Impreza Outback Sport Coolant Level

So I noticed the heat doesn't come out as hot as it use to- car takes longer to heat up. With this I notice that the coolant level is low- which I'm assuming is the source of the problem. Can I just run to autozone and purchase coolant there to put in? Or do I need subaru specific coolant? Can I just put some distilled water in there in the mean time?

Thanks guys
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Old 01-07-2013, 11:55 AM   #2
ans2k
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low coolant does not equates to longer warm up. longer warm up are usually dependent upon the weather. if it is cold outside, longer warm ups. if it is hot outside, shorter warm ups. but i do not have an answer to your question of what to put in. if it were i, i would stop by subaru from what i have read on these forums. but if this were my honda, i would poor in distilled water.
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Old 01-07-2013, 12:05 PM   #3
auskip07
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Using your heater can equate to lower coolant levels since the coolant populates the hoses running to the heater core.

You can just put water in there and be fine. make sure you run the car a little and let it mix with the existing coolant so that its not just water in a specific spot.
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Old 01-07-2013, 12:27 PM   #4
tomwi53092
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Quote:
Originally Posted by frost12850 View Post
So I noticed the heat doesn't come out as hot as it use to- car takes longer to heat up. With this I notice that the coolant level is low- which I'm assuming is the source of the problem. Can I just run to autozone and purchase coolant there to put in? Or do I need subaru specific coolant? Can I just put some distilled water in there in the mean time?

Thanks guys
The Subaru coolant lasts longer than a lot of the store-bought coolants. In theory, the life of your coolant is reduced to the interval of whatever coolant you add. I'm not sure how true that is in reality if you just top off with a small amount. I'd stick with the Subaru-brand coolant so that it's all the same formulation in your car. You could probably get away with just adding water if it's just one time and your climate is above freezing.
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Old 01-07-2013, 02:50 PM   #5
tomwi53092
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Quote:
Originally Posted by frost12850 View Post
So I noticed the heat doesn't come out as hot as it use to- car takes longer to heat up.
It's most likely the cold weather, as others have pointed out. However, if the coolant has gone down so low that air has gotten into the cooling system, the air can get trapped in the line and impede coolant flow. I don't know if it applies to the Impreza, but with my previous cars, I would do this to get the air bubbles out after replacing the fluid:

1- With a not-hot engine, take the radiator cap off.
2- Fill the radiator and reservoir if needed.
3- Run the car a few minutes until it's hot enough that the coolant is flowing. When it's warmed up, turn the heat on and rev the engine to about 2K-2.5K for about a minute.
4- Turn off the engine, top off fluid as needed, replace radiator cap
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Old 01-07-2013, 04:06 PM   #6
frost12850
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Thanks for all the input guys. I talked to the dealership, they told me to not put any distilled water into the system. It's due for its 40K mile service, so ill take it in for that and they'll too off the coolant I'm sure as part of it. The guy did tell me that if the level was anywhere near a "danger zone", then the coolant light would pop on in red.
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