Hot answers tagged

16

Yes, you should fill your tire. The fact the other tires all are nominally correct means you should trust your gauge. Modern tires often have reinforced sidewalls that mask the appearance of low pressure. Waiting for a bad wear pattern is not a good plan, as then you'll have an unevenly worn set of tires.


15

What is a Differential ? A differential’s job is to compensate for differences. Specifically the differences in wheel speed when turning. For instance, imagine taking a corner. Your inside wheel has a shorter distance to travel than the outside wheel as you go around the corner. That means that your outside wheel has to turn faster to keep pace with the ...


11

It's used on front engine rear wheel drive and most 4 wheel drive vehicles it couples the transmission with the rear differential. Picture Source In the picture above you can see the driveshaft where it's connected to the pinion on the rear end. The drive shaft is the part on the lower right side of the picture. The other end of it would be connected to ...


11

Some things to check in order of likelihood- Check the battery connections are tight. A loose connection may prevent your car from starting, even when the lights, radio, etc., may seem to be working fine. The battery may not be fine. Lights are not high load,so having the lights work is not an indicator of how healthy your battery is Starter motor. ...


11

I would refer to it as a CV (constant velocity) joint spider.


10

Yes it can be easily done, but based on your scenario it's not necessary unless you want to sit for extended periods without running the engine. If you are going to leave the vehicle running for Air Conditioning for instance then you don't need to do anything it should work fine as equipped from the factory. Here are some things to consider If you still ...


10

It depends on a ton of things and it won't be linear in most cases. Every car has different things that wear out at different rates and those things affect horsepower differently as they age. Not everything that wears affects power. A coolant hose that wears out might cause the engine to overheat, but it won't affect power until then. But vacuum hoses can ...


9

Looking at this page, it shows the curb weight of a Volkswagen Passat B5.5 1.9 TDI 130 6sp to be 1342 kg. Subtracting this from your number, it comes up with 83 kg for your driver weight, or about 183 lbs for us 'Mericans ;-) This should be fairly close as long as it is the same spec as yours. It should be fairly close, though. I'd imagine there are some ...


9

Depending on the car model and the technology used, not all fluids I mention here do exist. Here is list of all that I know of: fuel (some cars use two typed of fuel, e.g., petrol and gas, so they have two fuel tanks) engine oil two-stroke oil (in some systems the oil is separated and only combined in the injection) gear oil Automatic Transmission fluid ...


9

In very cold climates there are electric heaters that replace the dip stick. They are plugged into an AC outlet and because they reach the oil pan they can apply heat directly to the oil. That way the oil doesn't get cold to the point where it totally looses it's ability to keep your engine protected at start up. It's plugging in that electric heater that ...


9

The charging system of a car can deliver TONS of power, so small fluctuations in the alternator or battery are going to be meaningless to the comparatively small amount of power a phone charger needs, so I'm going to say "no effect at all" here. Different models of USB chargers will put out a different amount of power, normally labeled in Amps or Milliamps. ...


8

I read on a forum that the issue could be down to certain earth wires. When depressing the clutch pedal, you may be earthing a electrical line going to the sound system which in turn stops the music. There are various earths located in the engine bay. Check around the inner wings etc and make sure all of them are tight.


8

Depending on who asked you, and why, I would assume they were talking about the special socket needed to removed locking lug nuts from the car. On cars that have them, one of the 4 or 5 lug nuts/bolts will have a smooth outside and a special pattern on the inside that only a certain key will fit. The lock can typically be found near where your spare tire ...


8

While i'm not sure if there are mechanical tachometers like speedometers electronic tachometers are quite simple. An electronic tachometer works like an old analog volt meter. The speed of the engine is converted to a voltage. The voltage is fed to the moving coil. The coil creates a magnetic field. That field of the coil tries to align itself with the ...


7

Of course it's possible, but in an ideal electric car, you don't even need a transmission with multiple gears. The electric motor has a much greater range of torque/speed output at its disposal than an internal combustion engine does.


7

A blinker relay uses a thermal switch which is a piece of curved, spring steel and a thinner piece of spring steel near it that has a wire coiled around it with a resistive property. When current is applied to the relay the coil of wire heats up and expands the small piece of spring steel until it pushes it to make contact with the larger piece of spring ...


7

It sounds like you need a trickle charger or battery maintainer - this is a small charger than monitors the charge on the battery, and keeps it charged. Most modern cars have electronics that have a continuous drain on the battery - a trickle charger produces enough power to compensate for this drain, so that even if the car isn't driven for a few weeks the ...


7

It says right on the webpage: Conventional all-wheel drive cars employ complex mechanical linkages to distribute power from a single engine to all four wheels. This sacrifices efficiency in favor of all weather traction. In contrast, each Model S motor is lighter, smaller and more efficient than its rear wheel drive counterpart, providing both improved ...


7

The general area could be called the "nose" of the vehicle. Depending on the vehicle's design, the logo may be found on the bonnet/front hood, front grille or front fender. Bonnet, BMW i8 Grille, Mercedes G Wagon Front Fender & Grille, Maserati Ghibli


6

Following on from Hillsons' answer, your best bet is to get a proper split-charge system with a leisure (aka traction) battery as the second battery. These are especially designed for powering equipment for long periods of time, with a different discharge pattern to suit prolonged low-level use, rather than a normal car battery which is designed for the ...


6

I'll make this a wiki answer so others can add to it... The first and most obvious thing is the old saying "if it looks too good to be true, it probably is". Look at the condition of the interior, particularly the driver's seat and steering wheel. Does the pattern of wear match what you'd expect for the stated mileage? Paperwork - do they have anything ...


6

For a car that has 4, 5, 6 and 7 gear options, if all else is the same, then your top speed will be the same; all that would change would be your acceleration: In each gear you have a range where power is at it's highest. Below this gear speed your power is low (have you ever tried to accelerate in 5th from stationary?) And above it you hit the speed ...


6

There are two main reasons auto manufacturers have started putting more gears into their cars: acceleration and gas mileage. The main purpose of it is to keep the engine in its torque band. This is the area where the engine is working at its most efficient (improved gas mileage) and since it doesn't have to build back up to its torque band after a shift ...


6

I'm an amateur mechanic, and i'm wondering if i could use an electric impact driver in place of an air driven impact wrench. The short answer is yes, the portable electric impact wrench will work great. The Dewalt unit that you show in your picture is the one that I have and it works wonderfully. I wouldn't worry too much about the battery (other than ...


6

I work at a manufacturing plant where we have a need to drive down connections with final torque values of 35 ft-lbs. For ergonomic reasons, we provide our employees with a "run-down" tool for getting the torque close, then they come behind it with a torque wrench (much like what you are doing). We've found that the electric impact tools have a better life ...


6

Because you have verified the gauge is working reasonably by trying the other tires, go with the gauge. Your owners manual will have the inflation pressures for your car. Just make sure that the recommended pressure in the manual is less than the maximum tire pressure imprinted on the sidewall of the tire. If it is, just fill it to the manuals recommended ...


6

In a car normal lug nuts or lug bolts in your case have some type of hex head. This can be easily removed with a lug wrench or a ratchet and socket. This also make wheels easy to steal. To counteract the theft there exist special lug bolts that have a non standard pattern. This pattern requires a key to covert the special pattern to a standard hex. This is ...


6

Definitely a knackered switch. The knob probably switches the common earth for the motors in each mirror so it looks like it's earthing both mirrors when it's in the R position. Like @Paulster2 said, you need a new switch. Try and find a service manual (there's usually PDFs floating around on the Internet) so you've got instructions for getting the door card ...


6

A catalytic converter incorporates a structure that is coated in precious metals. When catalytic converters first came out that structure was ceramic balls coated in the metals. This didn't work so well and the structure was changed to either a honey comb or a monolith, both ceramic. The tubes of the honey comb run the length of the converter. A monolith is ...


6

When you are traveling 20-30 mph, shift into high gear (6th IIRC) and push the gas 1/2 to 3/4 of the way down. If you see the RPM rise with no immediate increase in speed, the clutch is worn to the point that it is slipping. The amount of time between slight slippage and total failure is usually not very long. For a higher power car, you can expect to ...



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