Useful tips for drivers. Part III: review of the market of used cars, the bast reviews of cars
Credit: / USautoportal
Useful tips for drivers. Part III

11. When a side wind is very strong, it can increase fuel consumption by 40%. And headwind can do even more, especially when somebody has a roof trunk and keeps a lot of things there. Air creates a huge resistance, and the higher the speed, the more fuel is used to fight this resistance. One should bear in mind, that resistance grows not linearly but exponentially. That’s why the fewer things you have outside the body, the less fuel a car will demand. In this situation the most reasonable ride will be in a direct gear with minimal speed.


12. Dealing with an antifreeze leak. If there’s a small leak of antifreeze in the middle of radiator, one should discharge all of it and pour a glass of hot water there, mix it with 7 oz. of mustard and drive with this solution for a few days. After that discharge the solution, wash the system with hot water and pour antifreeze again. The crack will close up and the system will be sealed again.


13. If a trunk lock got wedged up, try to knock it a little higher, but don’t overdo. After the bump lock mechanism will start moving and you’ll open it.


14. Diagnosing the problem by the color of exhaust fumes. How to guess why used car is sick by the color of exhaust fumes? First of all, the color shows the condition of an engine. Ideally the fumes must be colorless! In any other case it wouldn’t hurt to think about the reason for “color fumes”. Blue color means you are in trouble. It’s a signal that there’s oil in the combustion chamber. The other reason may be bad condition of an oil remover or worn-out piston block.

Black color doesn’t mean anything good either. Usually it appears when gas doesn’t burn completely in the cylinders, that leads to settling of soot and black exhaust fumes. In addition it leads to unstable work of an engine, losing power or higher fuel consumption. It’s better to visit a service station as soon as possible.

White color isn’t that bad. Most likely, an engine isn’t warmed up enough or the structure of an exhaust system facilitates condensed vapors. However one more reason for white smoke may be the insertion of antifreeze into engine head gasket. In this case exhaust fumes will have a sweetish smell.

Keep in mind! Dark fumes signalize that one must urgently visit a service station and the faster everything is fixed the cheaper it will cost. Anyway it is better to repair your car than buy new car.

 

15. Reasons for engine noises. Almost every modern engine should work silently. Reasons and results of the noises can be different. Basically they can be divided into two categories: noises and pings inside a power station and outside. If the source of the abnormal noise lays inside the engine it usually means that some parts are warn-out or broke, like connecting rod and piston group or valve timing gear. As a rule, these pings are very sharp and their frequency increases with the growth of crankshaft rotation while accelerating. If pings are loud with vibrant “metallic” shade and they appear every time you push the gas – it’s the result of detonation – the explosion-like burning of petrol in cylinders. Main reasons for the detonation are: low-quality petrol, wrong setting of a spark angle and engine overheating. To eliminate this problem one should cool an engine down, adjust the spark system or change fuel. Strong and rhythmic pings in connecting rod and piston group signalize about the need of immediate service. These pings are usually located in the middle and lower part of an engine. If you hear noises of this kind you should shut an engine down right away because it can wedge up or break any time. It’s better to tow the car to the service station or use a tow truck.

If you hear any sharp growling sounds in the crankshaft area while pressing a gas pedal it may be a signal to show an engine to the mechanic as soon as possible. Snaps or strong cracking sounds from under the hood can signalize about broken pulleys of cooling liquid pump drive, generator and power steering. Cracking sounds may come from foreign objects (branches, pieces of plastic etc.) that accidentally got into moving parts of an engine and auxiliary equipment. Even noise and whistling under the hood may show that generator bearings are worn-out. Snaps may come from worn-out or delaminated drive belt. If the shriek or whistling increase or disappear after pressing an accelerator the problem is in drive belts. Don’t panic if you hear different sounds from under the hood. Usually most of the problems can be solved at the spot with minimal knowledge and skills. And your classic car will be as good as new.