Pᴀᴜʟsᴛᴇʀ2
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Does kicking a tire off your car from underneath it while it's held up by a stable jack pose safety threats?
102 votes

The ONLY time you should crawl under a car is when it is supported by a jack stand or on a lift. A jack is used to jack the car up and let it down. It is a huge safety concern to use it to support the ...

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Can salt water be used in place of antifreeze?
Accepted answer
88 votes

Uh ... absolutely not. Salt water will cause corrosion with in the engine block. Salt water is an electrolyte, so will pass electricity which will cause electrolysis. Also, it might be able to handle ...

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Why don't we rotate tyres but you rotate tires?
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78 votes

tl dr: Kwik Fit is full of crap. It's good to rotate tyres (and tires, too :o). The entire idea of rotating tires is to keep the wear relatively similar (or even), front to rear. If rotation is done ...

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What actually happens when there is not enough oil in a car engine?
Accepted answer
72 votes

Engine oil does much more for an engine than lubricate. It provides cooling, cleaning, and a bunch of other chores. You already know engine function is degraded when you run out of oil. Let's see if ...

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Why don't rally cars have airbags?
Accepted answer
69 votes

For the most part, they don't need it. The purpose of the air bag is to protect the occupant as the body is thrown forward in a crash. Most racers have such vastly improved safety equipment over what ...

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How do cars drive through deep water as shown on many videos online?
57 votes

One of your questions as stated and not answered is: What is the recommended thing to do if you need to pass through an area that's been flooded? The answer to this has nothing to do with ...

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Why use snow tires on all 4 wheels on 2-wheel-drive cars?
Accepted answer
55 votes

What you are failing to realize is the non-drive axle provides stability. Yes, the two tires with power going to the ground needs traction to motivate the vehicle down the road, however, you still ...

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What does a water-like drip coming out of the exhaust of the car signify?
Accepted answer
52 votes

It signifies that the car is running absolutely correct. Here is the reason why: A gasoline (petrol) molecule is made up as such: C8H18 (or 8 Carbon atoms and 18 Hydrogen atoms) Energy is obtained ...

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Why doesn't anyone ever repair an automatic transmission?
Accepted answer
47 votes

This is one of those things which are easier said than done. To start with, let me show you a picture of a four speed transmission which has been blown apart: All of those hundreds of parts go ...

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Do cars consume less gasoline when the tank is full?
Accepted answer
46 votes

No. If anything you'll get worse gas mileage with a full tank because you're carrying a heavier load (more fuel = more weight). What you are most likely experiencing is the top half of the tank is ...

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Why are engines labeled as 2L or 3L?
42 votes

When they put "3L", which stands for "3 litres", it is the approximate displacement of the engine. Displacement is the swept volume of all cylinders combined. Swept volume of the cylinder is if you ...

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what is difference between DOHC and SOHC?
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42 votes

For those who don't know, SOHC and DOHC refer to the following: SOHC - Single Over Head Cam DOHC - Double Over Head Cam A cam refers to a "cam shaft" or the thing which goes bump in the night. The ...

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What can I do to keep a threaded bolt from falling out of its slot?
40 votes

The easiest, most economical method I can think of is to use Loctite Blue 242. You apply it to the thread, torque it to spec, then within 24 hours it will keep the bolt held in place without issue. If ...

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What are these metal clips where my wheel rims meet the tires and what are they for?
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39 votes

They are exactly what you stated: wheel weights. They are used to balance the tire so when you are going down the road you don't get an out of balance condition. These are VERY important for several ...

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Why could my vehicle be shaking around 60mph after hydroplaning?
38 votes

You stated you had dirt in your wheels from the incident. Two things could be happening to you: You still have dirt in one or more of your wheels causing an imbalance. A simple scrub will take care ...

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How can I keep stray cats off my car?
36 votes

If you do not want cats (whether stray or otherwise) on your vehicle, conceal it either in a garage or car cover. They can get the car cover as dirty as they want to, but they will not get it onto the ...

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Brakes make a "POP" sound and then I can't brake
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35 votes

Yes. One of your brake pads on the caliper side of the brakes had been worn so far down it popped out of place. Now you are stopping using the caliper piston against the brake rotor. You will now have ...

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Do matching (left/right) lights often burn out within a short time period of each other? If so, why?
Accepted answer
34 votes

No, the salesman was spot on. If you think about it, bulbs are designed to last about the same amount of time. If they are installed in pairs, then the secondary light which matches the first will ...

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We have fuel injection, why not air injection?
Accepted answer
34 votes

Simple reason: volume. @ 14.7:1 stoich, your input into the cylinder would need to be 14.7x bigger (or push that much more) through a nozzle than you would the fluid which is fuel. You state it would ...

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Do I need to replace my rotors?
31 votes

While I cannot see the back rotors very well, I can tell you without a doubt, the front rotors are brand new. You can still see the crosshatching on the surface which means it was prepped. It doesn't ...

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Battery drops to 10.5 volts after charging
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29 votes

Yes, this is a bad battery. One of the cells has most likely shorted. Each cell is a little above 2vdc. A fully charged battery will usually be ~13vdc. If you lose one cell, it will drop it down ~2vdc,...

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Why are these wires sticking out of battery terminal?
28 votes

The main reason those would be sticking out of your battery post/terminal is because the terminal clamp has become too stretched. Someone put the copper wire in there to take up the slack of the clamp....

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Should I really keep my gas tank at least half full?
28 votes

I'd suggest there's credence for all of these Your fuel pump overheating if it runs dry Unbeknownst to most, the fuel in the tank cools the fuel pump in most vehicles. The pump sits in a ...

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Car won't start after sitting for 2 years even with a jump. Is it a starter or alternator issue?
Accepted answer
27 votes

If the battery is completely dead, especially after sitting for two years, it most likely won't take a charge. Without the battery getting charged, you most likely don't have enough juice coming ...

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Seized engine due to being run without oil
27 votes

Yes, it could go that far ... it really depends on the condition of the oil and the engine when the oil dropped, but yes it absolutely could go that far. As a side note ... If she was able to get it ...

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What should always be replaced when rebuilding an engine?
Accepted answer
27 votes

If the intent is strictly to rebuild, here is a list of items which should always be replaced: Rings Compression rings Oil control rings Bearings Main bearings Rod bearings Cam bearings (not ...

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Why do I need to turn my crankshaft after installing a timing belt?
Accepted answer
26 votes

Yes, it's absolutely necessary. As you state, the primary purpose is to check the timing. It is far better to do this by hand and ensure the timing is right rather than to start the engine without it ...

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Wrong octane fuel
26 votes

It's not a problem mixing them. Just start using 95 if that is what the engine calls for. You'll not create any issues doing so. Modern day engines have sensors which can adjust for the fuel. If ...

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I ran my car on almost no oil for a few weeks before realizing the problem. Now what?
Accepted answer
26 votes

It sounds as though you were low on oil, but not out of oil. Your MS6 requires around 5.5-6 quarts of oil, so if you dumped three quarts in to get it up to level, you still had nearly three quarts in ...

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What are the pros and cons for the two possible "gear directions" when parking the car on a hill?
25 votes

You've got several things wrong, as you've made a lot of assumptions. First, in an engine if the ignition isn't turned on (ie: if it doesn't have power), you cannot push start it. You can turn that ...

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