Question about Dodge Grand Caravan

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All of a suddent the coolant bottle ran out and the car over headed I had to shut it down and found the bottle was empty.. any reasons why it would do that?

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Start simple , fill bottle and look for a leak in the bottom of bottle, bottle may have crack ,it won't empty on its own unless theres a leak some where. look under vehicle and try to spot leaks , look around hose connections.

Posted on Mar 28, 2011

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Why would i be going through so much coolant without a leak


Check your oil. There probably is coolant in it from a head leak. Also look at the exhaust . Should not be white and smoky. There is a leak somewhere.

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flushing a radiator is a waste of time and money as blocked cores do not flush. Have a pressure test done on the coolant system and check for external leaks. have a compression test done to check for head gasket and cracked head. Have a flow test done on the radiator and if shows signs of blockage replace the radiator .. Always fill the radiator at the radiator cap and not the reserve bottle. The reserve bottle water will not go down until the engine coolant starts to cool so if it is going down when the engine is hot then you have a bad leak in the reservoir bottle.

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Coolant reservoir is full and radiator is empty why is it not circulating?


Hi Tiffany,

The engine coolant does not "circulate" through the reservoir in your Jeep. This system works on the fact that things expand when they are hot and contract when they are cold. When the radiator is full, the coolant expands when the engine gets hot and the overflow runs down the small hose to the reservoir. When you shut the engine off, the coolant contracts and a vacuum is created inside the radiator causing fluid to be drawn out of the reservoir and into the radiator. When you start your engine and it gets hot, the cycle begins again.

If the radiator is empty, this sytem cannot work. There will not be enough vacuum generated in the radiator to draw the fluid from the reservoir (too much empty space and not enough coolant contracting as it cools).

You need to find out WHY the radiator is low. If it is low, there is a reason for it. Either something is leaking EXTERNALLY like a hose or water pump, or something is leaking INTERNALLY like a blown head gasket or a cracked cylinder head. Proper diagnosis is recommended.

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Had my head gasket replaced 6 week ago and the car ran fine up untill last week when i checked the coolant an it had used nearly a full expasion bottle full so i topped it up and when i checked it this...


Those expansion bottles are not meant to be topped off. When the engine gets hot it's going to push coolant out of the bottle then when it cools down its going to look like your losing coolant. What's the psi rating on your radiator cap? Make sure it's the appropriate psi rating for your system. Less psi allows the coolant to escape prematurely. Try replacing the cap. The cap may be old and the coolant is getting by because the spring on the cap is bad. If your worried about the head gasket, have a repair shop test the coolant for engine gases....just to make sure it's not the gasket again. Because if they didn't resurface the head when replacing the gasket it may very well be a blown gasket again.

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Seems as if coolant is leaking into motor oil - signs: lifters tick as if washed down by coolant - coolant bottle empties in 2 days - oil level over full - how else besides bad head gasket could coolant...


Its the head gasket.Get it changed and have the head checked for cracks and get the head skimmed has it may have warped.All alloy heads warp when being removed so have it skimmed before replacing.

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I've been experiencing over heat problems with my 2003 honda crv. the temperature usually raises when i'm driving in an inclined or hills like roads. i have already over-hauled my radiator, i also had my...


Replacing a cylinder head gasket is a miss or a hit. In some cases, just replacing the gasket may work. But if the cylinder head is bend, dealer may ask to replace it, because "machined aluminum heads rarely works". In this case the cost may be more than $1000. It is a good idea to send the cylinder head for inspection, in a machine shop. They charge $150 for inspecting, checking, cleaning and if necessary machining the head.
If the timing belt will be replaced this is an extra cost. If someone will just replace the gasket, on a bend cylinder head, it is more likely to blow out again. This problem can be solved if the gasket be replaced properly, checking and taking care for the cylinder head too.
As the coolant warms up, it expands and for that reason you have two marks at coolant bottle. Down cold and up hot. It is normal for the coolant to overflow from coolant bottle, if it is filled to the upper mark with engine cold, way up the cold coolant mark. Let engine to cool down overnight and set the level at coolant bottle at the lover mark cold. If it will overflow again this is a bad sign. The pressure at combustion chamber varies from 75 in idle up to 150 or more in higher RPM. If the cylinder head gasket is blown, then gases are blown into the cooling system, increasing the pressure, the radiator cap pressure relief valve is open and coolant is discharged in the coolant bottle. In such cases it is common for the coolant bottle to boil. You can observe gases discharging in the bottle, mixed with coolant, from the cooling system. These are symptoms of a blown cylinder head gasket. Because you replaced it once, there might be a bad (bend, deformed) CYLINDER HEAD too.
To find it out you have to perform cylinder compression test on your car (PROFESSIONALLY).
1. Start with a normal ("static") compression test. To eliminate rings, valves, holes in pistons, that sort of things. A normal cylinder balance test is also helpful (so you know which, if any, cylinder is presenting a problem). Engine should be warm.
2. Put all spark plugs but one back in. Ground that plug wire to prevent module damage. Disconnect that injector on a port fuel system.
3. Put your compression tester into the empty hole. The test can be done without a Shrader valve, but most people recommended leaving the valve in the gauge and "burping" the gauge every 5-6 "puffs".
4. Start the engine and take a reading. Write it down
5. Now goose the throttle for a "snap acceleration" reading. Reading should rise. Write it down NOTE: Don't use the gas pedal for this snap acceleration. The idea is to manually open then close throttle as fast as possible while without speeding up the engine. This forces the engine to take a "gulp" of air.
6. Now write down your readings for at least the bad cylinder (if there is a single bad cylinder) and maybe 2-3 good ones. Make a chart like this: CYL STATIC COMPR IDLE -RUNNING COMPR - SNAP Cyl 1 150 75 125 Cyl 2 175 80 130 Cyl 3 160 75 120 Cyl 4 160 80 125
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Consult a professional with the readings. If the gasket is to bad, you may have very low compression at lease in one cylinder.
If you will get a positive confirmation for a bad cylinder head then you have two options:
REBUILD THE CYLINDER HEAD or REPLACE IT.

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Daewoo espero coolant


Hi Arvid! You do need to keep putting Coolant into it until it will not accept anymore. The block and radiator will hold Probably 4 Gallons of Coolant and Water.If it is not Cold where you are, Just use water the First time to see if it is Leaking out of the Head instead of wasting all the Money on the Coolant Because if it has a Leak you will have wasted all that Coolant and $ For Nothing! Let me know what you Find out! Please Rate My Response, I need all the Help that I can get on Ratings! Thanks and Good Luck!

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