Question about 1991 Dodge Caravan

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What would cause overheating with radiator full of fluid and coolant?

1991 dodge caravan, intermittant overheating, minimal fluid/coolant loss.

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  • Contributor
  • 13 Answers

That old of a van I would say the cores in the radiator are corrodied and stopped up and impeding the flow of water though it. to check drain down the water in the radiator to about half after the engine is warmed up. Take a flashlight and look down the neck of the radiator and look at the ends or the cooling tubes they should be clean and no buildup, if they have a lot of buildup on them then they are probable plugged and not flowing water. Then start the engine and rev it up. You should see water shooting out of most of the cores above the water line the ones that no water comes through are plugged. The best fix is a new radiator you can pick them up off ebay at a much better price than the auto parts store. I have put 5 of them in different things including my 2001 caravan with no problems.
If money is tight and you are able you can drain the radiator and refill with distilled water and run it for a day or two then drain and repeat for several days. the distilled water is pure so it will absorb the mineral deposits that has built up in the cores from useing tap water to fill the radiator. But this may not get enough out to help because the water needs to flow through the tube to work. and do not do this if you live where it get below freezing. When you get finished only use distilled or deionized water mixed 50/50 with antifreeze to refill. You can by 50/50 premix but you are paying several dollars for a half gallon of distilled water that you can buy at the grocery store for 50cents
hope this helps

Posted on Jan 23, 2013

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  • Dodge Master
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Either the water pump or the thermostat.

Posted on Jan 23, 2013

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Posted on Jan 02, 2017

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SOURCE: Where is the drain valve on 2002 dodge caravan radiator?

its a pitcock facing the cab bottom of the radiator, plastic flat. once you find the pitcock just put a bucket underneath and turn it.then refill. if you want to flush(run fluid thru to clean it out) the radiator id suggest taking it in. you dont have to flush it every time you change the coolant out.

Posted on Mar 28, 2009

  • 18 Answers

SOURCE: overheating 97 dodge caravan sport

i had the same problem, i dont remember the name of the piece but its mounted right in between the driver side headlight and the radiator. its a relay that turns the fans on when the car gets hot. its mounted on the body of the car. there should be wires leading from the radiator to the piece im talking about.... good luck I also paid about 35 dollars for the piece

Posted on Apr 29, 2009

  • 299 Answers

SOURCE: 98 dodge grand caravan. it is overheating. I

if the bottom hose and top hose are not the same temp replace the thermostat

Posted on Sep 30, 2009

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Is the thermostat opening at 195 degrees ?
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1 Answer

88 dodge chadow,overheating and no heat


How long has it been going on? You need to check if you have a bad head gasket. A compression test of the cylinders would tell you. Not saying that's what it is, but that can be a cause of overheating. And it can also be an expensive result of prolonged overheating. That's why mechanics caution against running an overheating engine. If you find the head gasket is good, it will give you great peace of mind, knowing the Shadow's engine warrants a few more dollars in repairs. Compared to the cost of a new head gasket and having the head checked for straightness and for cracks, other repairs for overheating is minimal.
First check the coolant level and keep it full. It could be a worn water pump. Feel for pressure behind the coolant when you squeeze the upper radiator hose for a second or two. The engine needs to be warmed up and running, so the thermostat is open. Try to squeeze the hose closed, then let off and feel for a surge of coolant, and watch the coolant in the radiator for pressure pushing coolant on through the radiator. Kind of a rough test if pump is circulating coolant. You might also try a new thermostat. They are cheap and easy to replace. Clean the outside of the radiator of leaves or dirt. It should be checked for blockage. When upper hose is hot, the lower hose should also be hot or quite warm, just not as hot as the upper hose. If it is, radiator seems not blocked.
Don't worry about having no heat at this time. When the overheating is solved, and coolant level is full, the heater will return.

Jan 15, 2013 | 1988 Dodge Shadow

1 Answer

My 06 caravan is overheating. I think something is causing my rad fan fuse to blow. Fluids and thermostat are good. What can it be?


Hello and welcome to FixYa!


If you have overheating problem, it can lead to multiple issues. You may be running on low coolant that's why the vehicle overheats. If that's the case, please add coolant and make sure that it sits on the right level, too much coolant can cause overheating too for coolant will overflow.


The vehicle may have a faulty or worn out radiator blower motor that's why it overheats. If that's the case then you will need a blower motor replacement to resolve the issue.


If the radiator is clogged with dirt and rusts this issue occurs too. The coolant doesn't flow normally on the cooling system if it's clogged. If that's the case, I strongly suggest that you have the radiator flushed to drain out dirt and rusts. If you think that the radiator served you enough then it's better to have it replaced.


Please do check the radiator hoses, If you have worn out hoses it can cause coolant leakage which can result to overheating. A tiny hole is good enough for the vehicle to overheat.


A faulty thermostat sensor can cause the issue too. If you have worn out thermostat, the fan may not trigger that's why the fan won't work when under stressed conditions. A blown radiator blower fuse can cause this issue too so I suggest that you check the radiator blower fuse and replace it when necessary.


Hope you find this information helpful enough and thank you for using FixYa! Have a good one!

Apr 12, 2011 | 2006 Dodge Grand Caravan

1 Answer

Aldine@netzero.net 95 dodge caravan overheating and no heat, changed thermostate and radiotor cap


Hello and welcome to FixYa! If you have overheating problem, it can lead to multipleissues. You may be running on low coolant that's why the vehicle overheats. Ifthat's the case, please add coolant and make sure that it sits on the rightlevel, too much coolant can cause overheating too for coolant will overflow. The vehicle may have a faulty or worn out radiator blowermotor that's why it overheats. If that's the case then you will need a blowermotor replacement to resolve the issue. If the radiator is clogged with dirt and rusts this issueoccurs too. The coolant doesn't flow normally on the cooling system if it'sclogged. If that's the case, I strongly suggest that you have the radiatorflushed to drain out dirt and rusts. If you think that the radiator served youenough then it's better to have it replaced. Please do check the radiator hoses, If you have worn outhoses it can cause coolant leakage which can result to overheating. A tiny holeis good enough for the vehicle to overheat. A faulty thermostat sensor can cause the issue too. If youhave worn out thermostat, the fan may not trigger that's why the fan won't workwhen under stressed conditions. A blown radiator blower fuse can cause thisissue too so I suggest that you check the radiator blower fuse and replace itwhen necessary. What causes the radiator blower fan fuse to blow? It's becauseof a failing radiator blower motor, If that's the case have the radiator blowerfan motor replaced. If the fluid in radiator doesn't circulate then it meansthat you have a blown head gasket or a faulty water pump. I suggest that you gofor the water pump replacement first specially if you think that it's near theend of it's service life. Usually, water pops out the radiator when engine isreved (a sign of faulty water pump and possible blown head gasket). Hope you find this information helpful enough and thank youfor using FixYa! Have a good one!

Jan 13, 2011 | 1995 Dodge Caravan

3 Answers

I put a new thermostat on my 2005 grand dodge caravan yesterday, today I have no heat. Some said vapor lock, where is the air drainage on this model?


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1 Answer

96 dodge caravan to show its overheating then return to normal


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1 Answer

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