Question about 1999 Subaru Legacy

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Car overheating driving along car overheated white smoke stopd couldnt find leak or anything, topped up coolant and water , temp guage still rises to h any ideas on whats wrong

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White smoke coming from the tail pipe is showing a mix between radiator fluid and oil being burned. You would be looking at a problem with you head gasket...

Posted on Jan 13, 2009

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Remove the spark plugs and check to see if there is any moisture in the cylinder or plug. Check the oil stick for any signs of water . it seems to have mixed some water with the oil. if there is not any signs of water /oil mixed try replacing the temperature control sensor. or have the car scanned for a code.

Posted on Dec 23, 2008

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Thermostat stuck close, was your cooling fan on while this was happening?

Posted on Dec 23, 2008

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Hi,
I'm not familiar with your model to know if you have an engine temp guage or a light that would come on if the engine is overheated. You said the motor wasn't overheating under the hood... but you have an overheating problem? Maybe just a tad bit more info...
Are you losing coolant?
The water pump if bad, would probably leak or make terrible racket.
Just to take a shot at it, since you said it blows smoke through the dash... I'm assuming a kindof white smoke with a rather sweet smell? Have you noticed any wetness on the passenger floor at all? If yes to any of this, I would suspect as you mentioned, a leaking heater core. Hope this helps... Good luck!

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1 Answer

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It can a the first stage of blowing head gasket.

Fill your coolant tank to the full mark when it's COLD.

Start the car, and pay close attention to the tail pipe for a small puff of white smoke.

After 15 minutes,If you do see any vapor then take the car for a 8 minutes drive.

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1 Answer

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First, plastic tube may be the overflow vent from the coolant bottle.Check to see where the attached end goes. You are going to have to check engine for coolant leaks (carefully refill system without spilling anything, then look for dripping anywhere. Look for leaks from all hoses, fittings radiator, water pump etc) After checking for leaks, start it up and check again (watch where you put your hands though) While running, check that the fan comes on when the vehicle reaches operating temp.(no fan, check fan motor, sensor & relay) Turn the heat on (does it have heat?) Check temp of lower hose and upper hose. If overheat happens, is lower hose still cold? (likely bad thermostat). If you found a leak, replace whatever is leaking...best insurance is to change thermostat after any overheat. Last, is there any white smoke from tailpipe, does engine run rough? If so, could be a failed head gasket or crack in cylinder head. (at this point last thing to worry about unless there is excessive smoke or rough run or oil in radiator or coolant in oil).

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