Question about 1997 Volkswagen Jetta
Car overheating coolant in resevoir cold radiator top hose boiling hot. Overheating problem comes and goes. 1999 vw passat
Posted by Anonymous on
First-change the thermostat and bleed the system.If the problem is still there change the water pump.
Posted on May 15, 2010
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.....
Posted on Sep 29, 2011
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Posted on Jan 02, 2017
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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