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Coolant is backing up into resivor and car is over heating

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Hello: Sounds like you have blown head gaskets. You can find out for sure by using a tool from a parts store that can sense exhaust gases in the coolant.

Posted on Nov 10, 2010


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On a 3.4 liter engine is the coolant resivore suppose to empty when driving then refill when its shut off

Yes that is exactly what it is for But
With the car cold open the radiator cap and make sure it is full then replace and check that reservoir is full to the cold fill line.

Hope this helps Mike

Feb 13, 2016 | 2005 Pontiac Grand Am

1 Answer

Why would coolant boil over, out of overflow resivor?

this is from a boiling engine
It is because the coolant is subject to excessive heat probably from head gasket or cracked head, inoperative cooling fans, blocked radiator cores or flaked fins on the radiator core. The initial problem may be from a coolant leak that dropped the coolant a dangerous level.

Feb 19, 2015 | 1994 Saturn Sl

1 Answer

My 1999 chevy cavalier is over heating

sounds to me like you may have some leaking valves and its causing your engine to over heat. and if you dont fix this problem soon, you will cause your engine to blow. i wouldnt chance driving either.

Apr 29, 2012 | Cars & Trucks

1 Answer

Not heating up prperly


Apr 13, 2012 | Cars & Trucks

1 Answer

Coolant resevior, over flow hose at top near cap, where does it go back into?

There will be one hose that goes from the radiator to the resivor, then one that goes from the resivor, which is an overflow tube, it does not connect to anything.

Mar 21, 2011 | 2000 Pontiac Sunfire

1 Answer

How do you reset the LOW COOLANT light on a 2006 G6

you should be able to fill coolant to full level , also resivor and light willl go off, unless the sensor gets stuck or is bad, try taping on resivor see if it goes off may be stuck.

Jan 26, 2010 | 2006 Pontiac G6

1 Answer

The low coolant indicator remains lit after topping off coolant. I suspect the sensor needs replacing or cleaning. Where is it located and can I do this easily by myself?

the sensor is probably located in the coolant resivor,,,in the bottom,but you usually cant take them out,and cleaning it will not fix it,,you most likely need a new coolant resivor as that is the only way you can get the sensor as part of the resivor
good luck ,i hope this helps

Oct 08, 2009 | 2002 Chevrolet Suburban 2500

1 Answer

My 2004 saturn ion has a coolent alarm going off but the coolent is full and it dose not over heat

the sensor in the coolant resivor tank is bad and misreading, the sensor is part of the tank u can not replace it seperately so u need a coolant tank,,common ion issue

Aug 14, 2009 | 2004 Saturn ION

2 Answers

Engine is over heating and blowing air into coolant resivor and boiling coolant

The blowing of air into the coolant resevour is caused by a leaking head gasket. What's happening is the cylinder is blowing air into the cooling system causing this to happen.

Jun 24, 2008 | 1996 Chrysler Cirrus

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