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Vw polo overheats

Vw polo 1600 overheats top hose hot bottom hose cold changed thermostat changed rafdiator

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  • 62 Answers

A cold hose indicates an air lock in the cooling system, if this is the case have it bled to remove the air lock. it could also be combustion gases leaking into your cooling system indicating a possible head gasket failure, your anti freeze can be tested for traces of combustion gases.

Posted on Nov 28, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

keemo68
  • 1263 Answers

SOURCE: 2002 V.W. Jetta 2.0 liter overheat

turn your heater on to max heat and high fan. then see if you can feel the hoses on the firewall for heat they should be hot. make sure that the fan unit on the radiatoris working if the upper radiator hose is hot the fans should be running if they are not that means that either the relay is bad the thermo sensor is bad or the fan unit is shot... please rate the solution..........thanks

Posted on Sep 24, 2008

j_del
  • 1586 Answers

SOURCE: Audi A4 95 2.6 Abc engine

To be honest, I don't have any experience with the 2.6, but from the sounds of it, you have coolant flow through the upper hose (which would explain why it's hot) and none through the lower hose (which is why it's cold). One resource you could check is www.vagcat.com - sign up (free) for your car and drivetrain, and it should show you everything you need.

Posted on Sep 14, 2008

sawdust46694
  • 398 Answers

SOURCE: new thermostat,waterpump,coolant,block flushed rad

take the thermostat out and heat it up in a pan of water to see if it will open when it gets hot.
you should see it open when it gets hot.use a cooking thermometer to watch the temp. it should open between 180 and 225 deg.

Posted on Aug 04, 2009

  • 75 Answers

SOURCE: 1990 toyota corolla wagon 1.6 liter 5 spd. overheating

you've got a possible blockage in the head or block.

Posted on Oct 03, 2009

  • 7353 Answers

SOURCE: 2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat

Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Posted on Nov 19, 2009

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How to know if thermsat need change on Honda accord v6


1. If your coolant temperature is high your engine will overheat and you may have a faulty thermostat . However overheating may also be caused by other issues such as a failed water pump, blockages in the cooling system, a compression leak into the cooling system and other issues.

2. When the engine is fully cold open the hood and locate the top radiator hose running between the top of the radiator and the engine. Start the car and then feel the top hose. It should stay cool for a short time while the coolant gets to operating temperature and then the thermostat will open. When it opens the hot coolant from the engine will flow through the top hose into the radiator and you should feel the hose warm up very fast. This is an indication that the thermostat is operating normally but it is still possible that it is stuck partly open (when it should be fully open) and is impeding the flow of hot coolant from the engine. In that event it would need to be changed.

If you start the engine and you almost immediately feel hot coolant running through the top radiator hose the thermostat may not be closing at all and may be stuck fully open or partly open. It would then need to be changed. If stuck fully open the engine will run too cold some of the time and inefficiently, especially if the outside air temperature is very cold. But if a thermo is stuck fully closed or partially closed this will cause the engine to overheat and engine damage will result.

To properly test a thermostat it really needs to be removed from the engine. Please read the section in the link on Thermostats.

What to Do When Your Engine Overheats



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Mar 26, 2016 | Honda Cars & Trucks

1 Answer

How can I adjust my polo classic 1998 fuel injection revs.Normaly it idle on 900, but now increased to 1300 to 1600


knocked the ECT connector wires loose?
so my guess you mean, hot engine races,because cold engines all do that , by design.
racing idle hot.
  1. engine not hot. thermostat bad.
  2. engine hot and Ect Sensor lies, (wires fell off)
  3. ISC valve stuck open or wires, bad to it.
  4. vacuum hose knocked loose or you cracked it, now sucks air and engine races, (speed density EFI systems
  5. .
lots more, but am lazy , on beach

Jan 18, 2015 | Cars & Trucks

1 Answer

I have a 2002 1.4 vw polo overheating. The temp gauge just keeps going up. I have no hot air coming through the vents and the bottom radiator hose stays cold but all other hoses get hot. The car was fine...


It's not likely the thermostat as they tend to stay open when they go bad; but you have no circulation when the lower hose remains cool. Most likely it's too low on coolant for circulation or the water pump is failing.

Apr 21, 2013 | Cars & Trucks

1 Answer

Where is the thermostat on polo 1400 year 2005 located


follow the top radiator hose back to the engine,the thermostat is in that housing unbolt the 2 bolts and take it out

Feb 11, 2013 | 2005 Volkswagen Polo 1.4i

1 Answer

Moter overheats when driving top raiator hose is hot bottom hose is cold


Thermostat is stuck in the closed position. If you replace the the thermostat and still have the overheating problem then it's the water pump. Both are fairly easy to replace.

Feb 19, 2011 | Subaru Legacy Cars & Trucks

1 Answer

Overheating Polo


this sounds like a thermostat fault, but also could be the sensor switch to the radiator but is more likely the thermostat, it should be located at the front top of engine, follow the top water hose to the engine and you will find the thermostat housing, also just a heads up, these had a problem when first made, according to the known fixes and problems with VW's the hoses corroded inside and started loosing water, this could be wise to get the system presure checked to...hope this helps

Feb 08, 2010 | 2001 Volkswagen Golf

1 Answer

2002 dodge 1500 Changed radiator, thermostat, and hoses. No heat


Why was radiator replaced?Did it have heat before ? If it was plugged, the heater core may also be plugged. Try flushing it with a water hose in both directions. I dont know why the botton radiator hose would be cold, the radiator should be a uniform temp and the air coming through the radiator should be HOT, when the engine is at operating temp. What condition was the old coolant? if it was rusty, the water pump may have lower flow than normal.

Nov 19, 2009 | 2004 Dodge Ram 1500

2 Answers

Overheats gets hot on the top of the motor but at bottom hose from thermastate it is cold changed radiater and put in two thermastates still gets hot help


1. In order to eliminate, remove the thermostat altogether, for now.
2. Make sure the heater bypass hose is working. You could route the hose going into the interior heater and bypass the heater also.

It should eliminate a lot!

Next, consider the water pump.

Hope this helps!


Sep 15, 2009 | 1995 Lincoln Continental

2 Answers

My VW Cabrio is overheating after 1-2 miles. Coolant in recovery tank is boiling by this time and making bubbling noises. Someone changed radiator hoses, flange, some housing. They are saying that radiator...



Run the engine and look at the header tank , is there lots of air bubbles coming back out of the water if is then the head gasket may have split and that is down to either a can of Radweld or a strip down repair

If the radiator is not uniformly hot them I would go for that as your problem

Normal operation is that the engine starts the thermostat is closed , engine block heats up and opens water starts to circulate around the block

So to check that you need to fill the radiator with cold water run it for a few minutes check the bottom hose it should be cold

The stat opens and the bottom hose should get hot as the water from the block is pumped into the radiator for cooling.

The radiator should get hot all over and the cooling fan should kick in when the sensor hits the over limit stop.

If that does not happen then get someone to remove the stat altogether (It is only there to get the engine block warm quickly in cold regions )

In which case the bottom hose should go from cold to warm to hot

Jun 23, 2009 | 1997 Volkswagen Jetta

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