Archive for November, 2010
Why does a car engine overheat?
There are many different reasons that can cause an engine overheat, but they all have in common three aspects. The three aspects which all engine overheat factors have in common are that they cause that the heating system can not get rid of heat, they cause a loss of coolant or they directly cause too much heat in the engine.
One first problem which might be the cause of an engine overheat is a problem with the radiator cap and the pressure it holds. If the radiator cap does not hold pressure correctly then coolant could boil and therefore the engine would overheat. Another reason might be caused by thermostat failures; it is recommendable that you check it.
The car engine might also overheat due to coolant leaks such as those from the radiator, the hoses, the water pump, the freeze plugs or any others. Also, problems in the water pump could be the cause and therefore you should check it and replace it in case it is needed.
Some other reasons by which the car engine could overheat are problems in the exhaust system which you can discover by checking vacuum readings, pipes and converter. Besides, you should also make sure that the radiator hose has not collapsed and the ignition timing is working properly.
You should also check the electric cooling fan by making sure that the fan motor, the relay and temperature are correct or otherwise it could cause the engine to overheat. Besides this, you should also check the radiator in case there are any debris in it as well as you should check its hose in case it has collapsed.
It is also recommendable that you check the antifreeze concentration which should be 50/50 in order to be correct, otherwise it could cause the car engine to overheat. If you do not find why your engine does overheat, you should ask a mechanic or an expert for advice. You should not try to fix this if you do not have the proper tools and general car knowledge necessary for it.
How to change a tire without help
Learning how to change a tire can be one of the most useful things you could learn regarding your car. Having a flat tire in the middle of a route or on your way to an appointment can be a big problem if you do not know how to change it and have to wait for help, and therefore, it would be great if you can do it without having to wait for someone else.
In order to change a tire you should make sure you have parked your car at the side of the road and following all the safety rules that correspond to the case. You must apply the parking brake and place the shift in first gear. Then, you should look for the spare tire, the lug wrench and the jack. If you do not know where the spare tire is, you can look for it in the car owner’s manual.
Once you have found all you need, you should start by taking off the hubcap of the tire you wish to remove. You should do this with the help of a screwdriver or the end of the lug wrench. Then you should loosen the lug nuts with only one turn, do not completely loosen them until you have lifted the car.
Next you should lift the car with the jack. If you do not know how to do this, you can find instructions in your car owner’s manual on where to place the jack as well as the jack itself might bring some directions too. You should lift the car until the tire you wish to change is some inches away from the ground. Then finish removing the lug nuts and remove the tire.
Once you have removed the old tire, you should place the spare one in the correct place aligning the holes. Then, you should place the lug nuts and tighten them until they feel secure. Once you have done this, you must lower the car back to the ground and take the jack away from it. Then, you should have the flat tire repaired and change it back as soon as you can.
How to check and change your air filter
You car’s air filter is very important since it maintains some parts of your car system clean and free of dirt. If your air filter doesn’t work properly and dirt enters your car this might make it go through different problems, and therefore it is important that you check the filter and change it when necessary. Your mechanic can do it for you although it is very easy and you could do it yourself as well.
It is recommended that you change your car’s air filter once a year or every 15.000 miles if you live in an averagely dusty area. But, if you can check it once in a while and replace it as soon as it needs it this would be much better. Checking it is a very easy thing to do and replace it is not complicated once you learn how to do it.
If you wish to check your car’s air filter yourself and in an easy way, you can do so by using a light from inside pointing outside and check how bright it looks through it. If you see the light clearly, then your air filter is still good, but if you can’t see much of the light then it indicates the filter needs to be changed.
Newer cars have different air filters than older ones. If your car is rather new, its air filter is probably rectangular and you might find it located under the hood, near the radiator area or the fender wells. In order to change it, you must open it and take the actual air filter from it, replacing it by the new and then closing it again.
If your car is older, then the air filter will probably be of a big round shape and located near the engine area. It might probably be screwed, and all you might need to do is to unscrew the cover, let the air filter come out, and place the new one instead of it. You must pay attention in case it has any other attachment mechanisms such as clips which you would need to take off as well.