Akrapovic Posted June 24, 2019 Posted June 24, 2019 José Clopatofsky, director of the magazine 'Motor', answers those and other questions. Some people wonder why your car overheats frequently? Why is a noise heard when accelerating? At what time should the oil be changed? and other concerns that surely you have also had at some time. Clopatofsky, director of the magazine 'Motor' answers these questions. Is gas saved if the air conditioner is not used? Is it true that when driving on the highway, for example, going up the Line or similar, the ideal is to do it without having the air conditioning turned on to avoid extra fuel consumption and lack of engine power? / Ricardo Forero The air spends between 4 and 8 horses depending on the size of the compressor. Then that power will not be available to move the car, but the surplus is enough. The comfort of the interior is paid. You decide if you are comfortable or stifled. Overheats frequently I have a 1998 model CR-V truck that has a problem that has not been solved so far, as it has been repaired twice due to overheating in the brand's workshops in Bogotá. Every time I'm going to use it, I have to check the water in the radiator and I have an auxiliary bottle because they are always almost empty. Why is the problem? What should they look? / Jorge Gómez As always, the remedy is to find a leak because the water that is not in the bottle and the radiator is because it escaped through some leak in hoses, radiators, cap, flask, pores, etc. The water in the jar or jar has minimum and maximum levels because there is a phenomenon of expansion so the key is to see the level in hot which is the point at which the engine is using all the liquid. There are devices to measure the tightness of the system by pressurizing it, and although I guess they will have done the tests, they have to be repeated because it is the only way to find leaks, either external or eventually at some point of the cylinder head or pores in this or the block, but this is more remote. Noise when turned on I have a vehicle whose engine makes diesel-type noise when it is initially turned on. What can be happening? Will it be the type of gasoline or the drivers? / Jairo Bernal Gasoline has nothing to do with it because to make an audible piston in the ignition it is necessary that the spark is totally lost and when heating, it breaks the pistons in the short term. The impellers, if they are hydraulic, can cause that noise, not all but one that is discharged, and you have to identify it well to avoid getting into the expense of changing them all, which is what the workshop will probably suggest. Another probable cause is that you have an improper oil filter and it does not retain the lubricant, so when you turn it on it takes a while while it is full and the oil pressure rises and the noise that you will surely hear is the crankshaft hitting the crankshaft . The secrets to take care of the painting of your car This is the first hybrid, electric and plug-in Ferrari vehicle Sym, the Taiwanese brand that bets on the motorcycle in Colombia Five modifications that you should not make to your car Electric scooters and shared bikes await regulation Mercedes-Benz joins sustainable mobility with the EQ brand Oil change I have a R9 Maximum Model 93 that I use very little with short routes and only in the city. A year ago I did the 20w 50 oil change but it has only traveled 300 kilometers. Can I continue driving it up to 5,000 km or due to the time I have to renew the oil anyway? / Luis Carlos Hidalgo You can follow up to 8,000 without doubt because the oil is changed for hours of service, not by calendar. Of course, when you use it, take out the car and make a good distance and time, minimum 20 minutes or more, so that the residues that may be in the oil evaporate when it is well heated and sludge is avoided. They do not know what has I have an Optra 1.4, 2007, in very good condition, just that it navigates. I took it to the test bench and they did not come up with the problem. What can I do or where can I go to correct this? / Sergio Camacho Show the anchoring bushings of the rear axle because when they have a game, the entire rear axle gives direction and the car navigates. That phenomenon is given by moving parts of their suspensions. the octanes and the compression ratio How does the compression ratio influence an engine? What does 8: 1, 9: 1 and 10: 1 mean? As for octanes in gasoline 85, 95 or 110, what does this mean? How do I know the number of octanes a car should use? / Gregorio Vidales The compression ratio is the difference between the total volume of a cylinder of an engine with that which remains when the piston reaches its top dead center. How many times that space is reduced is the figure you quote, for example, 10 times when it is 10 to 1. The higher it is, the more reaction there is in combustion and the more power the engine generates. 2
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