Question about 1997 Volkswagen Jetta

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Car overheating, coolant in resevoir cold,

Car overheating coolant in resevoir cold radiator top hose boiling hot. Overheating problem comes and goes. 1999 vw passat

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First-change the thermostat and bleed the system.If the problem is still there change the water pump.

Posted on May 15, 2010

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Hello,

when the car overheats, is there still water in the radiator?
If there is water in the radiator and the car overheats, then it means there might be some dirt or blockage in the radiator or condenser.

When the car is on the motion, air passes through the front and assists the fan to cool the engine. There are situation whereby air doesn't have free flow because of blockage in the radiator and condenser. Dust and debris can cause blockage. If this be the case, have your radiator washed thoroughly and cleaned.
If there is no water in the radiator when the car overheats, then there is a probably a leakage from the water pump. Or maybe your fan isn't blowing properly. The fan might be blowing weak air.

The above are what could cause your engine to over heat.
So start the check from the radiator. Poor water into the radiator, wait for some minutes, look under the car and observe if water is going to leak. If there is a leak, it might be from the water pump or a leaking hose.

If water from radiator has no leak, have your radiator washed and clean the condenser has they might block air that is suppose to cool the engine.

Also, make sure your fan is blowing properly or well enough to cool the engine.

Make sure you have the above checked thoroughly as they are the major causes of problems like this.

This overheating problem could lead to a burnt gasket and this can dry the engine oil which will eventually knock the engine. So have this problem fixed to prevent further damage that will cost you more money.

Lastly, remove the hose that connects the radiator to the engine, water from the engine will come out. Pour water into the radiator, the water will flow through the hose down to the ground. Do this severally. Now connect the hose back to the engine, pour water into the radiator. Start the engine, the water in the radiator will reduce, add more water till radiator is full.
In summary, the major cause of over heating problem is from the radiator, fan, water pump, blockage in the hose, and dirt in in/on the condenser. These are area you need to concentrate on.

I forgot to mention that the acceleration meter or engine meter on the dash board shouldn't be more the 5. It should be below 5. If it is above 5, it can cause overheating. I hope you understand what I mean.....

Regards.
Walesarumi

Posted on Sep 29, 2011

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jim4984
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SOURCE: car overheating, coolant in resevoir cold,

Check that your electric radiator fan is working. When the car is hot and idling it should come on.

Replace your therostat. I had a Chevy Citation that the thermostat would start to open and then close instead of opening all the way.

Posted on Mar 21, 2010

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2 Answers

I have a 1998 oldsmobile aurora that is overheating. no leaks, runs fine then temp goes up and coolant boils up to the resevoir cap and comes out around the cap. replaced thermostat. fan comes on


Try changing radiator cap if there is no water in the oil it is not a head gasket could be system just needs a flush. It could also be the water pump is not pumping well try the cap first.

May 30, 2014 | 1999 Oldsmobile Aurora

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Will the thermostat make your car run hot


an faulty thermostat will make the car boil but the water will normally go to the resevoir bottle. I be checking for burst radiator hose or cracked top tank before anything else. Thermostats are c;osed when the engine is cold and as the water heats up they open and allow water to pass through the radiator to cool. Coolant over the engine means boiling and escaping through an opening (hose,tank punctured radiator etc)

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I keep overheating changed out thermostat and fan and still overheating I fill the hose with coolant and it all goes into the overfill tank and gets hot and boils out


A clogged radiator could be your problem. Flushing won't necessarily clean out a clogged radiator.
When it's idling and getting hot, the clutch fan should be running full on, actually "roaring" as some say, and the electric auxiliary fan or fans should be on if you have them. Also test your radiator cap, replace if needed. Hope this helps.

Jul 03, 2011 | 2003 Dodge Durango

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My 1997 Dodge Intrepid overheats. I've replaced the thermostat, and it continues to overheat. I noticed adjacent to one of the radiator hoses, a ribbed hose that is split. Could this cause the car to...


Now that you've eliminated the thermostat, it could be a number of other things. Don't drive the car too far until you've fixed the overheating problem - overheating can destroy an engine.

That split ribbed hose you see is plastic wire loom - it carries and protects electrical wires, and is not the cause of overheating.

1. Low coolant level
2. Radiator hose split/cracked, causing low coolant level.
3. Head Gasket - leaking, causing low coolant level
4. Thermostat - stuck closed (you eliminated this possibility)
5. Radiator cap - worn/damaged
6. Radiator fins - obstructed by debris/cardboard
7. Water Pump belt - missing/broken
8. Heater Core - leaking, causing low coolant level
9. Intake Manifold Gasket - leaking, worn, damaged
10. Radiator Fan Relay - faulty
11. Radiator Fan Blade - broken, missing
12. Radiator Fan Sensor/Switch - faulty
13. Water Pump - leaking, causing low coolant level
14. Radiator Fan Motor - faulty

My primary suspects would be Rad Fan Relay (#10), and
Rad Fan Switch (#12).

Oct 23, 2010 | 1997 Dodge Intrepid

1 Answer

Top radiator hose hot and lower hose cold. car overheating. I've changed thermostat.


Either the water pump has failed, the radiator core is plugged, or the lower hose has collapsed and blocking the flow of coolant. Hope this helps!

Oct 15, 2010 | Hyundai Motor 1999 Elantra

2 Answers

I have a 1999 Cadilac Deville that I replaced a


Are you sure the thermostat was in the wrong way ?.

The thermostat is located in the bottom hose unlike most conventional cooling systems.

The thermostat in the Northstar engine is a dual action device.
One end of the stem is the Thermostat(obviously) and at the other end is a spring loaded pressure valve(the thinner end).

Make sure the thermostat end is nearest the rubber hose and the pressure valve end is in towards the engine.

Also note that the cooling fans don't come on until the coolant temperature hits around 225 degrees.
During normal highway driving the fans will very rarely come on(if at all) due to constant air flow through the radiator.They will only usually come on in heavy traffic conditions on a hot day.
But......if you have the Air Con switched on, the fans will run all of the time.

For overheating problems consider the following......

The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Jun 30, 2010 | 1999 Cadillac DeVille

1 Answer

Car overheating, coolant in resevoir cold, radiator top hose boiling hot. overheating problem comes and goes. 1999 VW passat


Check that your electric radiator fan is working. When the car is hot and idling it should come on.

Replace your therostat. I had a Chevy Citation that the thermostat would start to open and then close instead of opening all the way.

Mar 21, 2010 | 1997 Volkswagen Jetta

4 Answers

Why would the coolant be boiling in the overflow resevoir?


the engine is overheating or u have a defective radiator cap

Oct 17, 2009 | 2001 Chrysler Sebring

2 Answers

Overheating,reserve coolant tank boiling I have a 2000 Ford Taurus with the similar problem. I had my water pump replaced then this started.


Ford 2000 Taurus

To solve the problem you have the things to do in this order;

) When the engine is cold top off the radiator with fluid. (When the pump was replaced the fluid should have been also)
) Make sure the radiator fluid has anti-freeze in it. This is also anti boil also !
) Add fluid to the overflow reservoir.
) Make sure the drive belt was replaced on the water pump.
) With the engine running, you can add fluid to the radiator for the first minute or so. You want to get air pockets out.
) Replace radiator cap.
) Let car warm up. When it's hot you should get the radiator fan coming on.
) When it get hotter the air-conditioning fan may come on.
) If the fan does not come on, the heat sensor is probably bad.
) If all fans come on, and it overheats, you may have a bad thermostat. Trace the upper radiator hose to where it connects to the engine. That's where it located.

Do not operate the engine when it overheats, You will damage the head gaskets and cause radiator fluid to leak into the cylinders.
If you smell radiator fluid in the exhaust fumes, it may already be leaking.

May 07, 2009 | 2000 Ford Taurus

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