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Posted on Nov 05, 2009
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Over heats after 10 minutes running. I have taken rad out and ran water through it, put it back in and when it is running the bottom hose collapses.

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  • Expert 58 Answers
  • Posted on Nov 05, 2009
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Check the hose and see if it's real soft or even tacky feeling first. If it runs for a few minutes then collapses it's doing it when the thermostat opens. If it does it right when the engine starts cold the thermostat could be stuck open.
It could be caused by just the hose(some had a spring inside to keep them from collapsing) or any combination of the hose, thermostat, radiator and cap.

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  • Master 2,841 Answers
  • Posted on Nov 05, 2009
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Is the cooling fan running? If so, drain the radiator with the heater control set to hot. Install a new thermostat, and fill the system with a 50/50 mix of antifreeze and distilled water. Bleed all air from the system by using bleeder screws if equipped, and by starting the engine with the radiator cap off radiator full. Watch for escaping air bubbles and keep the radiator full. When you see no more air escaping put the cap back on. If the fan is not running then that is your problem. Turn the A/C on and the fan should run continuously. If it does not the fan motor is more than likely bad. Check the fuse for the fan. If it is good, Apply 12 volts directly to the fan motor to check it. If it runs then replace the thermal relay.

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How do you clean a very plugged up radiator,
Empty the system. Remove the hoses. Plug the bottom hose outlet with plastic and a hose clip. Fill with CLR and water 1:10 ratio. Leave overnight. Drain off CLR solution in to a bucket. Put all the hoses back on. Put the CLR and water mixture back in. Top up with water. Go for a 30 minutes drive. Drain, flush, run for another 10 minutes. Drain and fill with antifreeze.
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May 10, 2012 • 1998 Subaru Forester
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Replaced thermostat but still overheating?
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I am replacing my pump, but it says to flush the system 1st. How do I do that?
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Ok, g35 coupe 06,52k miles Had over heating problem in april 2010,replaced thermostat, all's well. Now Jan 2011 overheating again, noticed upper & lower radiator hoses collapse, changed thermostat...
Heres a couple of things you can check. Start your car and remove the radiator cap,(before it gets hot mind you) when it reaches norm operating temp, look inside radiator to see if water is circulating. If its not moving, its a bad water pump. Also, youre hoses should never collapse, if they collapse when they get hot maybe you need new hoses? Finally, if those dont work, flush out your radiator. Open the bottom cockpit and use a garden hose and let it flush out the system while the car is running, about 10 mins should do the trick. If the radiator looks clean inside then it doesnt need flushed.
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I have a 2000 voyager that my water pump went, i lost all the coolant, so i just added water. the temp was out side 10 - 15. the temp is still the same. i went out to start my van, the serpentine belt...
If you do not have acess to a warm garage so you can though the van out properly,it is going to be tough.One can only asume that if the radiator is half full of frozen watter and the bottom rad hose is frozen as well that the block will be half frozen also. You need to remove the radiator, hoses and thermostate.Plug in block heaters,put about half a bottle of strate ANTI- FRE.... in the engine where you took the thermostat from. Place an adiquet drip pan under watter pump area.Thaw Radiator and hoses out in a warm plase.Once the block is thawed out you can install the radiator and hoses and a new belt.If you think it is taking to long to thaw out the engine block you can purchase a heater that will stick to the bottom of the oil pan they are magnetic and very strong,the more heat the better.Good Luck.
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Dec 09, 2010 • 2001 Chrysler Voyager
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1994 Honda Civic LX\overheating within 2 mile drive
Remove and raise upper hose at thermostat end and remove lower rad hose.
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Honda rads are cheap.....any restriction....replace rad.

Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose.
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Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.

Stop leak can plug everything.

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Aug 23, 2009 • 1998 Honda Civic
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