Question about 1995 Dodge Caravan

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My '95 dodge caravan will not give out heat unless i am going 60 mph. It does not overheat. when i open the radiator cap it bubbles back at me. the heater core is not leaking water into the car. I replaced the thermostat about 6 months ago. What should i do?

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Test your heater control valve located in heater hose

Posted on Feb 07, 2010

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How do you bleed the radiator on a 1993 dodge caravan?


Hi,just fill it up then leave the rad cap off when the water warms up the fermostat opens you will see bubbles and the water might go down top it up when you dont see anymore bubbles put the rad cap back on,run the engine up to running temp then let it cool down again then take rad cap back off and top up as needed and put rad cap back on job done,all the best.

Jan 21, 2016 | Dodge Cars & Trucks

Tip

How to burp your cooling system after replacing parts (works for ALL cars)


There's a common misconception that if part of a car's cooling system fails, the failing part can be replaced, the system closed up, fluid topped off, and the car will be ready to go. Many people have overheating problems, replace the offending component (thermostat, radiator, etc), top off the fluid, and then wonder why they still overheat.

This is because when the cooling system (which operates as a sealed system) is opened up and new components are installed, air bubbles become trapped in the system when it's reassembled. Coolant is added, but the bubbles displace some of the system's volume and become trapped in the cooling system.

The way to alleviate the problem is to burp the cooling system. It's easy to do, and only takes half an hour to an hour. It can be done at home very easily.

The first step is to reassemble the system after you replace whatever components are failing. Tighten all clamps, connect all hoses, and then fill the radiator or coolant holding tank, and fill the overflow reservoir to the indicated level (there's a small hose that typically runs from the radiator flange where the cap is positioned, over to the overflow container). Find the thermostat (trace the lower radiator hose back to the engine from the radiator - where it attaches to the engine is either exactly where, or very near, the location of the thermostat). Jack up the car so that the thermostat is pointed upward (the hose would be attaching at a downward angle). Now start the car.

You jack it up in this way so that the thermostat points upward. The thermostat will open downward in this position. Watch your temperature gauge as it rises to, and then beyond, the normal operating temperature. If it is rising very slowly, you can rev the engine, or hold it at 2000 RPM or so, to help build the heat. Eventually the engine will begin to heat up beyond normal and the gauge will climb. This is what you want. Allow it to climb to somewhere between 2/3 and 3/4 of the way to a full overheat, and then shut the engine off. Allow it to cool, and then CAREFULLY open the radiator cap. You'll hear a purge of pressure, and will probably see bubbling in the overflow container. Check the level of the coolant in the overflow and the radiator, top them off as needed, and repeat this procedure. Keep doing so until the car no longer overheats. Now, take it for a drive around the block a few times, and see if it overheats then (sometimes putting the engine under load will cause it to overheat even when it won't while sitting in the driveway). If it does not overheat, you are done. If it does, pull over, turn off the engine, and turn on the heat full blast (this will extract heat from the engine). Get the car home and burp it again.

Why are you doing this? Here's why. Those air bubbles in the system that I mentioned are the root of your evil. When you start the engine, the water pump spins and circulates the coolant (and air bubbles) throughout the engine. At some point, those bubbles come to the thermostat, which stays closed until the car gets to a certain temperature, at which point it opens and allows the coolant to go to the radiator to cool off. When the air bubbles get to the closed thermostat, they get stuck. In turn, having the bubbles pinned against the back side of the thermostat keeps it from opening since the system is pressurized and the thermostat can't open against the pressure of the bubbles. This is why the car begins to overheat. By waiting until you are most of the way to a full overheat, you get as many bubbles stuck there as possible.

Once you allow the car to cool enough that the coolant won't explode out of the radiator when you open the cap, you can open it. This relieves the pressure in the cooling system and allows the thermostat to open. The bubbles travel through the thermostat and hose to the radiator, burble their way to the top, and "burp" out of the cap's opening. With the bubbles out, the coolant level drops some (which is why the coolant as to be topped off), and you repeat the process since the coolant doesn't always follow the same pathway. You want to be sure that all the bubbles are removed from the system, so you do this a few times.

Hopefully this will help you with overheating problems and with diagnosing future issues. I know this is listed under Chevy cars, but that is only because I had to select something, and those are commonly owned cars. This process is important on ANY car, regardless of manufacturer or engine.

on Dec 03, 2009 | Chevrolet Blazer Cars & Trucks

1 Answer

98 f150 4.6L Little heat and now overheats and blows resivour cap....Head gasket ?


you need to check the radiator,, there is a good chance that the lower half is pluged up

Mar 08, 2014 | Cars & Trucks

1 Answer

Is my dodge ram van 2500 overheating either because of heater core, head gasket or just the thermostat


Hello! Can not tell from the question if your loosing coolant...But it sounds like an air bubble behind the thermostat is blocking the flow...Remove the thermostat...Replace housing...Buy a back flushing kit from an auto parts store...Back flush the cooling system...Make sure heat is on high...Replace thermostat and refill with 50/50...start the engine with radiator cap off...Let all the air bubble out, even after thermostat opens...Wait until upper hose gets hot then replace the cap...Top off in the recovery tank...Now, monitor temperature...If all is well back flushing and air bleeding cleared the fault...If engine overheats due to loss of coolant I'll address that next...If coolant is not being lost does the engine actually overheat? ie..bubbling into recovery tank...If not the temperature sending unit is defective...send a comment...Guru...saailer

May 04, 2012 | Cars & Trucks

1 Answer

2002 Caravan,3.3 V6,FWD,had a loose rad cap and lost fluids till no heat in heater.Replaced cap,filled overflow reservoir,ran for a few kms,refilled tank.Still no heat unless motor revs,all levels are...


You still have a lot of air in the cooling system and you have to speed up the water pump to get any coolant to flow through the heater. Let the engine cool off, then open the radiator cap and top off the radiator. Pour the coolant in at a rate slow enough to let the air bubble up without splashing the coolant back out. Once you get the coolant level up to the top overflow hose, the remaining air will be pushed out by expansion through the overflow tank once the engine gets hot, and will be replaced by coolant from the tank on cool-down.

Mar 12, 2011 | 2002 Dodge Caravan

1 Answer

2000 dodge caravan 3.3L is over heating


Hello, If your car overheats and damages the engine, you have no one to blame but yourself. Keep your eyes on the temperature gauge and never let the needle move into the red. Pull over before it gets too hot. And to resolve this follow this steps:

1. Turn off the engine.

2. Wait. If the engine is steaming, don't open the hood.

3. Pull the hood release lever under the dashboard to open the hood when the car has cooled completely.

4. Walk around the front of the car, reach under the hood, find the latch and squeeze it. As you squeeze the latch, pull up and open the hood.

5. Check the coolant reservoir tank first. It's a plastic jug that has a small hose running to the radiator. The reservoir can be filled when the engine is hot (except on German and Swedish cars, the plastic reservoir is also under pressure, so don't open when the engine is hot).

6. Open the radiator cap with a rag. Remember: open it only after the engine has completely cooled. If you're not sure, don't open the cap. If you open the cap while it's still warm, you may burn yourself with steam or hot coolant. Open the cap slowly, as if you were opening a bottle of soda that has been shaken up.

7. Examine the radiator. Look inside and see if there's coolant left. If needed, fill to the top of the radiator.

8. Put the radiator cap back on.


9. Check to see that the upper or lower radiator hose, or any of the heater hoses, hasn't burst.

10. Restart the engine.

11. Watch the temperature gauge obsessively. Don't let the needle go into the red. Turn off the engine if the gauge approaches the red zone.
Thanks
































Jul 20, 2010 | 2000 Dodge Grand Caravan

1 Answer

96 dodge caravan to show its overheating then return to normal


air pockets in the cooling system can cause this problem. idle engine with radiator cap removed for 10 -15 min. Do not let engine overheat and make sure coolant lvl is topped off. this should bleed all air from system.

Nov 07, 2009 | 1996 Dodge Caravan

1 Answer

No heat


check for air bubbles in the system also check the pressure cap and have it tested also squeeze the upper radiator hose together and if it doesn't open up in your hand right away the water pump could be weak work on getting the air bubbles out first before going to the water pump

Jan 22, 2009 | 2002 Mazda Millenia

1 Answer

2003 Dodge Grand Caravan Sport with no heat


check the coolant level. b-4 you start vehicle in morning, open radiator cap then start vehicle if level drops add until full then replace cap.

Dec 06, 2008 | 2001 Dodge Grand Caravan

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