Today,  we   will discuss “the vehicle cooling system”. Yeah, why your vehicle needs water and the things you should take note of to ensure you keep it “cool.

Car maintenance diy 4: Water or Coolant, what is the ideal fluid for vehicle cooling system?

In case you have missed the previous posts on cars maintenance on fuel consumption, engine oils, tyres, Please read.

Your Engine and its cooling system
The engine in your car runs best at a fairly high temperature. Your car engine is designed to run hot; When the engine is cold, components wear out faster, and the engine is less efficient and emits more pollution. So one important job of your vehicle cooling system is to allow the engine to heat up as quickly as possible, and then to keep the engine at a constant temperature afterwards…

Have you noticed when you start your car in the morning, it suddenly revs iteself for a while, this is to help heat up the engine to a temperature good enough for the engine to run more efficiently and its the more reason you have to start your car in the morning and allow it run for at least 60-120seconds (that’s about 2mins).This way, your engine temperature would have risen to a good point and will run more efficiently..So the combustion chamber is hot enough to completely vaporize fuel, providing better combustion and reducing emissions.
When  the engine is hot, the oil used to lubricate the engine has a lower viscosity (it is thinner) when hot, so the engine parts move more freely and the engine wastes less power moving its own components around and metal parts wear less…. So driving your car as soon as you start the engine isn’t such a good idea. It has been observed that your car engine wears out most when started in the morning and it is adviseable you don’t shift to gear right away as soon as you start the engine, allow it steam a little, what we call “warm” here…
For some people that jumpstart their cars, i’m not talking about those that bridge batteries to start their cars, i mean those that get to start their cars by pushing it, its usually not the best option.
Though economic situation often pushes many to that spot but considering what you are loosing in the long run, its not such a wise decision. To jumpstart your car, you will need to rev it as soon as you release the clutch and revving your car right away as it starts wears out the engine very quickly…
Some vehicle brands like volkswagen will switch off if you try to rev it as soon as you start the engine, its a sign that you are not doing the right thing…
Try to start your car without your foot to the throttle and let it idle smoothly for a while before you shift to gear. It doesn’t take much time but it sure saves a lot on the vehicle’s life span. Inside your car’s engine, fuel is constantly burning. A lot of the heat from this combustion goes right out the exhaust system, but some of it soaks into the engine, heating it up….

That is where the several cooling components comes into your vehicle’s operational model…
 As much as your car needs the heat to function optimally, it also needs to regulate it else it will burn itself out….

 How does your vehicle arrive at this equilibrium? 
Factors to consider include:
1. Vehicle’s cooling system…
2.  Cooling system and their functions and what should be done to keep them working efficiently…
3. Radiator and its function…
4. Radiator cover and its functions
5.  Thermostat, the return reservoir, pressure hoses, fans and then water pump…I’m sure many are not even aware a vehicle has a water pump

 We’ll get there and would round off by noting what is expected of you to do and watch out for…
There are two basic types of cooling systems for automobile…
We have the water cooling and the air cooling.
A. The air cooling is not very popular anymore and it is the type of cooling you find in Volkswagen beetle and a few other oldies… This technology requires air to cool the engine, they have no radiator, they only have fins to suck in air just like your petrol generator ….
B. The water cooling is more popular and of course more efficient… Its what we see more often in automobile engines…
So we will focus on water cooling,  how would you feel if you have to pump a little air into your tyre every morning? You will feel there is something not right somewhere or there is a leakage right?…. Same way, if you have to top your radiator water every morning before you leave your house, something is certainly not right somewhere or there is a leakage…
 What I’m trying to say in essence is that, your car radiator is not something you wake up every morning to add water to… It is designed to retain water and when you notice the water level goes down and you have to add water to it, something is just not right somewhere…

The reason the water cooling system is used more is because of its ability to be regulated. In water cooling system, water can be made to boil and then cool and can be made to be at a particular temperature for a good number of hours, something you really can’t do with air so much…
The radiator in your car serves two basic purposes, it serves as the reservoir for water and the same time a heat dissipator. It keeps the water for reuse and helps to push out heat because the engine experiences constant explosions, it tends to get very hot a point. Cooling this very temperature and not making it completely cold is something your radiator is very good at

Do you need to add water  into your car radiator every morning? 
Many European models make their radiator in such a manner that you don’t need to open the cap to know the water level…they have transparent plastic housing that shows you the water level and as long as the water level is OK, you need not add to it…
I’ve not added a drop of water to my radiator in a long time, say this year. Every time I checked the water level, its just still intact? Why? Since water boils all the time inside the engine/radiator, how come the eater never gets to reduce you will ask…
 Now let’s break it down, your engine gets very hot and the water is made to flow around the engine to cool is as it works, the eater needs to be a bit hot for a perfect combustion to take place but it need not boil for a very long time… In order to prevent the water from boiling, the cooling system is pressurized. Under pressure, the boiling point of water is raised considerably. However, too much pressure will cause the hoses and other parts to burst so a system is needed for the water to cool a little to reduce the temperature. That’s when the fins come in. The radiator is designed with fins with water pipes passing through the fins. As the engine gets to a particular temperature, your engine fan starts off and begins to blow the fins to cool the water and will stop blowing once the temperature is back to what the engine requires…this is one reason I advice against constant fanning. Some rewires bypass the thermostat and put the fan on permanent cooling. It keeps the radiator perpetually cooled but that has its effect because  if the water is overcooled, I mean cooled below the required temperature, the engine burns more fuel and wears out faster…

 Like I was saying, toping water every morning is a sign of a leakage or loss of pressure…once you arrive at that point where you have to always top your radiator water, you need to check it out….
Because water can boil very quickly, its often advice able you add coolant to your radiator. A radiator coolant does two basic job, it helps to strengthen the water so it can withstand higher pressure so it doesn’t boil very quickly and secondly it prevents rust in the cooling system…


What is the use of Coolant
I often advice against running your radiator on just water; Its not the best. Over time, water begins to corrode some of the metal water pipes and you can begin to experience leakages, meanwhile, running the Colling system on a combination of water and coolant will prevent that as the coolant ensures that rust doesn’t take place.
To add coolant, you need to know the size of your radiator, its often written on the cap of the radiator or if your car has a plastic reservoir, you will find it there…reason to know that is that your coolant shouldn’t be more than 70% of the entire water quantity. For example, my car carries an 11 litre radiator, so the entire coolant available in it should be 7litres or less. If you have between 40-70% , its very good.
Some people will just put a litre of coolant in a radiator of 10litres, that won’t have much effect though better than nothing.
So if your car is running on just water, make out time, buy at least 4litres of radiator coolant (4litre is about a thousand naira or thereabout), drain same quantity of water off your radiator and replace with the coolant, you will be glad you did. Rust with drastically reduce and you will have less reason to have problems with your cooling systems.

Next post on Car maintenance diy
We continue to look at radiator cover on its effects of cooling.

via Blogger http://ift.tt/2cxvPeP

Advertisements