Tº Volkswagen Vento Motor problem

It is not my car but I want to know that it can be, since my uncle thought that the water passed to the oil, but they told him that what he had bad was the vulvo that goes on the radiator, after that, the electro does not work so that he leaves it with direct connection, that same day of the change of the vulvo when the accelerate was exhausted by the place of the place of the deposit. Normal the flow, but now it does not lose water, but the engine tº is raised, which can be or that can be affecting, can it be the water pump ??? And how to verify the water pump would be to see if you have a game ??? or how ??? I await your answer, it's a Volkswagen Vento 1998 Motor 2.0

You may have to check that the thermostat opens correctly, when the engine is at operating temperature, the hoses that go to the radiator must be both hot, if one heats and another the thermostat does not open and you must change it, to know if the water pump works when accelerating the engine has to leave water through the thin hose that goes to the water storage; It also happens that this mangaite obstructs and does not let the refrigerant flow; If all this is correct you should think about the Board.

Hello good, a test to verify the water pump is also, you take two thermometers and go to the two sleeves of the heating radiator and you put a thermometer to each sleeve, you start the vehicle and the war hundred 10 minutes, if you see a difference greater than 20 degrees between the two thermometers the water pump is giving little flow, so it is damaged. Bullet. all the best

First, if only temperature rises, you have to check if the thermostat opens, this is known to check if the sleeve that leaves the radiator is heated when the engine is heated at normal operating temperature.
If this is so, it can be of the bulb that carries on the radiator this will be checked by bridging the two cables it has. If this is correct, with the cold engine, the water storage is uncovered, we will let the engine temper a bit and we will observe whether to accelerate the engine, bubbles appear on the deposit, which means that the Board of Cuatura is deteriorated and the compression gases to the refrigerant pass. To be completely you have to do a pressure test by putting it with a useful by the spark plug hole

Very good, but do not forget the easiest and most obio, first see if the electro starts or not, if it does not start, bridge the bulb cables and see if it starts, if it does not start, try the fan with direct current, if it makes it check the fuses and relais, and if everything is well just the thermostat, radiator and acking joint.