Question about 2004 Subaru Forester

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Is it normal for the coolant fluid to near the low level when engine is cold, then the level goes up when the engine is warm. I already topped it up with a coolant fluid twice after a long trip.I can not see any leakage on the floor after a trip though. Thanks for your help.

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Yes it is normal for the coolant level to be low when cold
when the vehicle is warmed up-pressure builds up and the level rises
so you never want to over fill the fluid or it will overflow
that is why you never remove a radiator cap or a pressurized coolant jug cap when the vehicle is hot

Posted on Sep 17, 2010

Testimonial: "Thanks for that info.,but i topped it up twice after some trips which i don't do to my other cars."

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2005 jeep liberty blows cold air through the heater.


Either you are low on coolant and there is air in your heater core, or the thermostat isn't working properly, or your water pump is going out.

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Hello! A thermometer light with two wavy lines underneath the thermometer indicates a problem with the VW's cooling system...When the engine is cold; Check the coolant level in the radiator...If it is full and since the light goes out when the engine reaches normal operating temperature the Low Coolant Level sensor is defective...But I suspect the level is low..
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Hello, I am the owner of a 2005 jaguar x-type. Upon start up when driving away I notice a "gurgling" sound coming from the engine in the location of the glove box.


Sounds like air in cooling system. Coolant comes through to back of glove box area for your heat supply.
Have you noticed less available heat than normal?

Check the coolant level in radiator, not just the top up bottle. DO THIS WHEN ENGINE IS COLD as hot system is under pressure.

Possibility of head gasket leak suppling gases to coolant system. IF so may be producing some persistant heavy white steamy exhaust, though not necessarily.

Topping up coolant will (should) make noise go away at least temporarily. You should look to see if any obvious leaks or wet spots at hose clamps and heater hose connections.

When engine is cold, open Radiator cap, look down (flash light helps?) to see fluid level, should be full to top.
If not, top up with correct coolant mix, leaving cap off, start motor and allow to idle till warm. If level drops top off some more. Watch the fluid as it flows past cap opening. a few bubbles for a few mins may be normal, but continous stream of bubbles indicate head gasket leak. Turn on the heat in car to full, (not the fan, just heat level) gently rev the engine and top up fluid at same time, (2 people) replace cap. Done. If there are no apparent problems.

If noise returns or does not go away, you'll need a professional inspection.

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The high temp gauge will max out and then back to normal. Also the heat will not work then kick in all of a sudden.


Let me guess...When the temp gauge goes hot, the heater goes cold, and vice versa? Check your coolant level first in the radiator (when the engine is COLD) and also in the overflow reservoir. ONLY use a 50/50 mix of coolant and water, using the same COLOR coolant that is already in the radiator (if it's green, buy green, if it's orange/red, buy orange/red). Next thing to have checked/replaced is the thermostat which is inside the cooling system of the engine. Finally, and the most expensive, have the water pump checked/replaced.

I would put my money on low coolant level in the radiator. As the engine heats up, the coolant will "surge" through the system as the water pump tries to **** air through the system due to low coolant level. If the coolant isn't flowing, the heat can't escape the engine block and it starts to overheat.

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1 Answer

Intermittent heat


Hi BSM,

Intermittent heat is usually the result of a low coolant state. What happens is the heater core isn't getting the circulation necessary to keep the air warm. The irony is that your engine will run hotter when this happens.

To fix this, start with a cold engine and open the radiator fill cap.
Start the engine and top off the coolant.
Let the engine keep running and warm up.
When it begins to cycle the coolant check the level again. Top it off again.
Turn the heater on full blast
Keep topping after each cycle until it stops needing fluid.

At that time the heater should be blowing hot air consistently.

Best regards
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this is probably normal, when cold, reservoir should have less coolant than warm, when engine cools it pulls coolant back into radiator and motor 

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Manual states that when the fluid is cold it will show up blue then as it wanrms up it goes away. a normal function. It's in the owner manual somewhere.

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did you check the fluid level by removing the rad. cap? Radiator should be full to top. If Chryslers are low on coolant, the heater will not blow warm air.

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