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44 votes
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Why do the brakes "freeze" the suspension?

I made a crude sketch illustrating the relevant points of the shown image. Brakes engaged: The center of gravity is above ground, the brakes "try" to slow down the car, the car itself "...
Martin's user avatar
  • 8,448
36 votes
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Brakes make a "POP" sound and then I can't brake

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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
33 votes
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When the handbrake is not working, is it safe to fully depend on putting car into park instead?

No, its up to you No No Assuming it is an automatic transmission using park is safe, there is a park pawl in the transmission that mechanically locks the output shaft, actually better than a parking ...
Moab's user avatar
  • 8,010
26 votes
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What's the best gear to leave a manual vehicle in when parked?

The lower the gear, the better the job the engine compression will do at holding the car if the brake fails, that's because a lower gear makes the engine spin faster and requires it to do more work ...
dlu's user avatar
  • 14.5k
26 votes
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Does a Car Keep Moving If Neither Accelerator, Nor Brake Is Pressed?

In short, find a better driving instructor and, if possible, learn to drive a car with manual transmission. The long (still simplified) answer: Does the accelerator control and ensure gas is flowing ...
fraxinus's user avatar
  • 2,042
25 votes

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

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 ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
19 votes
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What is regenerative braking and why don't we use it?

tl;dr: We do. It's just expensive. One of the differences between electric and chemical energy motors is that the electric systems make it much more convenient to capture and retain energy (e.g., a ...
Bob Cross's user avatar
  • 24.4k
19 votes

What are these loops in the brake line for?

They are often times referred to as service loops. Their purpose is to allow some flexibility in the event the master cylinder has to be replaced, or a fitting needs to be repaired. It makes it easier ...
mikes's user avatar
  • 19.9k
19 votes

When the handbrake is not working, is it safe to fully depend on putting car into park instead?

According to Wikipedia, this is not advisable: Most vehicle manufacturers and auto mechanics do not recommend using the transmission's parking pawl as the sole means of securing a parked vehicle, ...
Jack Aidley's user avatar
19 votes

What's the best gear to leave a manual vehicle in when parked?

When I'm on a hill with the front of my car facing up the hill I park the car in first and turn the wheels away from the curb so the transmission is fighting against gravity. When I'm on a hill with ...
fIwJlxSzApHEZIl's user avatar
18 votes
Accepted

Does the brake bleeding sequence really matter?

The sequence matters. If you have a lot of air right after your master cylinder for whatever reason, that air can travel to any point in the system. At some point, the hydraulic line attached to the ...
wesanyer's user avatar
  • 864
18 votes
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What are these loops in the brake line for?

It is about vibration. The master cylinder and brake booster are mounted to the firewall; the firewall flexes. They move up and down significantly as the body jerks up and down when driven over bumps. ...
Fred Wilson's user avatar
  • 11.6k
18 votes

5 inch lift and no brakes

Is the vehicle equipped with a brake bias valve on the rear axle? Some vehicles have a valve which adjusts the amount of rear brake balance sent to the rear brakes depending on ride height. Theory ...
Steve Matthews's user avatar
18 votes

Mechanic sent me this image and said my brake rotors should be replaced. Does this seem right?

The shiny rings on the rotors are the only parts that are doing any useful work braking the vehicle . The dull rings are rusty and are not serving any use. The rust rings will have worn the matching ...
HandyHowie's user avatar
  • 25.2k
17 votes

Disc Brakes Vs Drum Brakes

It's not really fair to say as a general statement that disc brakes perform better than drums. Brake effectiveness depends largely on the "swept" or contact area. In a truck, the shoes "liners" and ...
SteveRacer's user avatar
  • 12.4k
16 votes

What can cause perfect holes in brake rotors?

These are stomata (gas bubbles) in the cast iron or cast steel of your brake rotors. Stomata are usually perfectly round, but may be teardrop-shaped. They are sometimes not visible in the original ...
MTA's user avatar
  • 5,935
15 votes

Why does brake pedal ever move

You are correct, the brake pedal should only move when any of the 4 or more slave cylinder pistons move (some vehicles may have multiple cylinders in a caliper). Once the pistons of the slave ...
HandyHowie's user avatar
  • 25.2k
14 votes
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What could have caused 1 brake pad to wear down to metal while my other 3 pads are ~50% used?

It's must likely down to siezed slide pins, if it's a sliding caliper setup (more likely), or a siezed piston if it's a dual piston caliper. If it's the slide pins, it's a fairly easy fix - extract ...
Nick C's user avatar
  • 28.8k
13 votes

Brake flush vs. Replacing the brake fluid

There is no difference between the two. To replace it, you have to flush out the old brake fluid with new fluid. See this answer on how to bleed brake lines for more details.
Zaid's user avatar
  • 39.2k
13 votes

Do these EBC brake pads look like a counterfeit?

Checked EBC website FAQ There was a question on cross drilled rotors, that were represented as genuine EBC brand. Here is the last sentence of their reply: If you have any doubts that you are being ...
Abbottcost's user avatar
13 votes
Accepted

Brake have failed. Alternative means of braking

No. For (at least) three reasons: It's not safe. You're using the transmission/clutch to slow the vehicle down in a manner it wasn't designed to do. You're destroying your clutch. You state you ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
12 votes
Accepted

Brakes grinding when roads are snowy

Normal Sounds The sound you are hearing is the ABS releasing pressure within the system to allow the wheels to continue to rotate and not lock up when you apply the brakes in low friction conditions. ...
DucatiKiller's user avatar
  • 32.9k
12 votes

Do these EBC brake pads look like a counterfeit?

I can see two differences: The EBC website shows a 3D view of the brake pads, which show a different shape for the black region. This may be because you have a different brake pad shape from the one ...
Zaid's user avatar
  • 39.2k
12 votes

5 inch lift and no brakes

Firstly - NEVER drive any vehicle without fully working brakes - it is not worth the risk. I doubt the lift is the cause, unless the brake lines were not lengthened when it was done - if they weren't,...
Nick C's user avatar
  • 28.8k
12 votes

What's the best gear to leave a manual vehicle in when parked?

So, looking at a couple common manual transmission gear ratio charts, first gear would be best. Why? It has the highest ratio. Although it is (in the charts I found) very close to reverse. Here's a ...
kyle_engineer's user avatar
12 votes
Accepted

Can I fit thinner disc brakes to my car?

You have ordered the incorrect discs, or the supplier has made an error. You will need the correct vented, thicker, disc as the caliper has a « jaw » sufficiently large for the combined thickness of ...
Solar Mike's user avatar
  • 34.7k
11 votes
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What actually happens when there is no brake fluid in the brake fluid reservoir?

Not having brake fluid in your car won't destroy the brakes, but whatever you hit when the brakes don't work just might. :) The brakes in basically every passenger car since the 50's are ...
cdunn's user avatar
  • 9,316
11 votes

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

It sounds like the brake pads have either completely worn through or otherwise failed, your car is not safe to drive at all. In this case you will certainly need new pads on both sides and possibly ...
Chris Johns's user avatar
  • 1,596
11 votes
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Sequence for bleeding brake lines?

If you are replacing the brake fluid for example, bleed the corner farthest from the master cylinder first. Then the next farthest, etc, etc till you have done all four. If you're just bleeding air ...
cdunn's user avatar
  • 9,316
11 votes
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Replace driver side first, then passenger side brakes?

I'm going to assume you have a very good reason for not taking the other car out of the garage to give yourself more room... People replace either the front or rear brakes together because they are "...
JPhi1618's user avatar
  • 13.3k

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