Question about 2003 Ford Ranger Regular Cab

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Overflow tank appears to be leaking as I find fluid on the ground. the truck doesn't overheat or warm hot. how difficult is it to remove the overflow tank?

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Before removing the overflow tank check:-
1) the pressure cap is of correct specification and serviceable,
2) the overflow tank is not over-filled- space most be allowed for normal expansion of coolant.
The overflow tank should not be difficult to remove if it is necessary.

Posted on Nov 13, 2009

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Heater blows hot nnnnnnnthen cold ,,,,,,stays cold


To start, the first thing I would check is the fluid level in your cooling system. Do not remove the radiator cap if the engine is hot! The water will shoot out like a geyser and you could get burned or scalded by steaming hot water. Best to check it when the engine is cool.
If you need to add fluid it should minimally be a mixture of 50% water and 50% antifreeze. This way the fluid won't freeze in the winter or overheat in the summer.

Check the hose that runs from the radiator cap to the overflow container. Make sure it doesn't have any holes in it and it is not plugged up. Make sure the overflow tank has fluid in it to the level indicated on the tank.

These are basic, simple things to check. If these don't remedy the problem other possibilities are a bad thermostat, water pump, radiator cap, or a plugged heater core.

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Overheating coolant boiling out into reserve tank


you have a blown head gasket.. doesn't have to have coolant in the oil for a blown head gasket... if hoses are rock hard when running then you have exhaust leaking into the coolant via a blown head gasket...

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Radiator overflow tank makes gurgling sound after engine is turned off. Engine doesn't overheat. just had car service and coolent was fine. no leaks.


You might need to have your cooling system bled, to get all the air out of it. That gurgling is probably just air being pushed in to the overflow tank. Not to much to worry about though.

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My car is rumming hot and the antifreeze is leaking I'm thinking it's my water pump


It could be the water pump , or something else , like a faulty thermostat. Where is the coolant leaking from ? If it is leaking from the water pump , then yes , your pump might be toast.
If the thermostat is no good , the engine will warm up to normal temp , and then overheat quite quickly. As it overheats and the coolant expands and boils , it could back up into the overflow reservoir and leak out onto the ground. You need to get someone to diagnose the problem ASAP , running your engine in an overheat condition could very quickly blow your head gasket and/or warp a cylinder head. If you can , please post a bit more info. Does it run but at a higher than normal temp. Does it only overheat when stopped in traffic etc.
Could be water pump , or thermostat , or plugged up radiator , or nonfunctioning cooling fans.

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2003 Buick Century is over heating in the morning only. Radiator, thermostat and sensor have all been replaced. Water pump and fans have been checked. When it idles it gets hot but when you rev the motor...


Sounds like the intake gasket or even possibly the head gasket have gone south if everything else has been replaced. Internal engine leaks will cause engine to overheat very easily.

May 19, 2010 | 2003 Buick Century

1 Answer

Antifreeze overflow from tank


I would check for visible cracks and leaking at the overflow tank when the engine is cold, then when the engine is running and at operating temperature and not running and at operating temperature as well as during cool down. Also check the coolant overflow hose for leaks or obstructions inside the hose or if the hose is kinked. Check to make sure that the overflow tank cap is damage free and securely fastened.

May 05, 2010 | 1997 Saturn SL

1 Answer

My car begins to overheat.the water level in the radiator is good , but the small tank on top of the engine needs filling daily , what is that tank for.


its a reservoir for the cooling system. Fill reservoir to fill line ONLY. Filling above this mark will cause the cooling system to push extra fluid out through overflow vent and when you look again, it may appear to be low when it's filled properly. If you still have to flill every day when you're filling to line only, you have a leak. Is your oil milky? if yes you have a gasket out someplace. Wet spots on ground? you have a leak someplace. sweet smell through exhaust? probally a head gasket out.

Jan 10, 2010 | 1995 Subaru Legacy

2 Answers

Leaking antifreeze when engine heats up but cant find leak


Your engine is constantly warming and cooling. Your radiator cap has a set pressure release. As the pressure builds it allows coolant to flow out of the radiator into the makeup tank. As the engine cools it sucks coolant out of the makeup tank back into the radiator. If it overheats a lot then the makeup tank will overflow out of the overflow tube and it usually drips out under the car. If your radiator cap is bad or weak it can let coolant out when it shouldn't. This isn't a frequent problem but it can be a cause. The most likely cause is your thermostat is bad. The thermostat is closed when you start your engine and keeps the coolant inside of the block so it can't circulate through the radiator and cool until your engine is warmed up then at a set temperature (depending on thermostat), usually 195 degrees it starts to open and allow the coolant to circulate and cool. The thermostats can get bad and stick partial open or all the way closed and open. Yours is probably not functioning right and causing your makeup tank to overflow. When engine is cool look at makeup tank and you will see a minimum and maximum mark. Fill to maximum with coolant then start the car and let it warm up and monitor the coolant level and see if it is overflowing.

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2 Answers

Water was boiling and spraying from overflow / reservoir tank from what appears to be a factory made hole. was there a plug in there that might have rotted off and caused this?


well that mean that oone your thermostat is not opening or your water pump or possible that a hose might be collapsing to cause the water not to flow

May 25, 2009 | 2000 Chrysler LHS

2 Answers

Overheating,reserve coolant tank boiling I have a 2000 Ford Taurus with the similar problem. I had my water pump replaced then this started.


Ford 2000 Taurus

To solve the problem you have the things to do in this order;

) When the engine is cold top off the radiator with fluid. (When the pump was replaced the fluid should have been also)
) Make sure the radiator fluid has anti-freeze in it. This is also anti boil also !
) Add fluid to the overflow reservoir.
) Make sure the drive belt was replaced on the water pump.
) With the engine running, you can add fluid to the radiator for the first minute or so. You want to get air pockets out.
) Replace radiator cap.
) Let car warm up. When it's hot you should get the radiator fan coming on.
) When it get hotter the air-conditioning fan may come on.
) If the fan does not come on, the heat sensor is probably bad.
) If all fans come on, and it overheats, you may have a bad thermostat. Trace the upper radiator hose to where it connects to the engine. That's where it located.

Do not operate the engine when it overheats, You will damage the head gaskets and cause radiator fluid to leak into the cylinders.
If you smell radiator fluid in the exhaust fumes, it may already be leaking.

May 07, 2009 | 2000 Ford Taurus

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