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14 votes
Accepted

When buying a new tire at car shop, they pumped the new tire and it popped loudly, is that normal?

This is absolutely normal. What's going on is they are seating the beads of the tire against the rims. In order to get them to do this, they have to over pressurize the tires a bit, which then allows ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
12 votes
Accepted

Scraping sound in new small engine

I actually decided to go ahead and just tear into it no matter the answer and can make the following statements: Bore and piston rings were absolutely immaculate and there was no scraping whatsoever ...
Yanick Salzmann's user avatar
9 votes

Minor boost leak and shrill tone at peak boost: hose clamp, gasket or blow off valve?

It is quite likely the work performed has introduced a subtle air leak that only manifests itself under high boost. Pressurizing the intake tract with the car off will help you identify the source of ...
Zaid's user avatar
  • 39.2k
9 votes

How can I be sure that a rod knock is actually a rod knocking?

When you start the engine and you hear the sound, does it sound better after the vehicle is warmed up? A rod knock will only sound worse (louder) as the engine heats up. It will not go away as the ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
9 votes
Accepted

Why is air buffeting worse for most cars with the rear windows than the front windows?

In the simplest terms possible, the windshield acts as a spoiler or fairing, pushing the air out and up as your vehicle gains speed. The air naturally will push back to be along the side of the ...
CharlieRB's user avatar
  • 9,015
9 votes

Dealership's service dept drove my car 19 km

I see this completely normal and not a cause of concern. The service advisor's explanation is certainly a valid reason, but they could have needed to drive the car for a total of 19kms for many ...
WeakMech's user avatar
  • 964
9 votes
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Brake pads sliding (?) between reverse and forward?

Could be a couple of problems but most likely in my mind is that the calipers are not properly fixed to the caliper brackets or the caliper brackets are not properly fixed to the the wheel hub. I ...
jwh20's user avatar
  • 12.1k
7 votes

Weird "old"-sounding engine noise. What's the problem?

While @DucatiKiller is most likely correct, there is another possible reason for this noise, that being a leaking exhaust manifold. If the exhaust manifold is leaking at the head, it will make an ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
7 votes

Weird "old"-sounding engine noise. What's the problem?

it sounds like valves Your valves are at the top of the motor under the black cover. They are reciprocating devices, they move in and out and are operated by a camshaft that is spinning at half the ...
DucatiKiller's user avatar
  • 32.9k
7 votes

Minor boost leak and shrill tone at peak boost: hose clamp, gasket or blow off valve?

I Believe It's a Hose Connection Point Unmetered air whether it's a negative pressure or positive pressure is bad. That being said, I find it interesting that losing some of the boost isn't ...
DucatiKiller's user avatar
  • 32.9k
7 votes
Accepted

Loud squealing sound, only while driving (2002 Toyota 4Runner)

Sounds exactly like worn brake pads to me. Have you checked those recently? Brake pads actually have a wear tab on them like the one pictured below. This is designed to make noise (that chirping sound)...
Dalton D's user avatar
  • 1,958
6 votes

What is making a noise under my steering wheel when car is not moving?

I would venture to guess that it is a completely random, and in no way threatening plastic trim piece/wiring harness/adjustment lever under the steering column that is rubbing or vibrating against it'...
MooseLucifer's user avatar
  • 6,007
6 votes

Noise during hard braking

Other than some excessive wear/tear on your brakes? Most likely not. Brakes are made to take some abuse. More than likely the ABS kicked in and was the noise you heard. They can sometimes seem a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes

Loud squeaking - stops when braking

From your description, it seems the brake "squealer" has started to rub against the brake rotor. This is a tab which is attached to one of the two disk brake pads. When the friction material ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes
Accepted

Why does the fuel pump buzzing sound go away after a couple of seconds?

Most fuel systems have a pressure-switch. So when the power is first applied the fuel system is unpressurized. The fuel pump is then turned on to build up pressure so the engine can start. Once the ...
jwh20's user avatar
  • 12.1k
5 votes

'66 Dodge Dart made a loud CRACK, engine almost stalled. The second time it happened, there was a puff of black smoke

The car usually has trouble starting on the first try. It'll start and immediately stall. If it's warm out, I can pump the gas pedal once and it starts up fine. Otherwise, it might take a couple ...
Jim W's user avatar
  • 1,935
5 votes

Horrific Squealing on Start - 2002 Pathfinder

Check the tension on the serpentine belts at the front of the engine - sounds like they're a tad loose. It may be something else, but start there.
PeteCon's user avatar
  • 8,712
5 votes

Car horn works only sometimes and with very very low sound

Check to see how many volts the horn relay is sending to the horn. if it's less than ignition voltage at the horn either the relay is bad or you have a wiring problem. If you have ignition voltage at ...
Ben's user avatar
  • 10.7k
5 votes

Is this Mazda 3 motor mount broken?

Whoever said that these mounts commonly fail is entirely correct. These mounts are oil filled. The brown stuff on top is likely not hydraulic fluid. When the mounts fail they split along the bottom ...
vini_i's user avatar
  • 16k
5 votes

If my wheel bearings are freshly replaced, what could still be causing a loud whining sound?

Fist thing is to check that the bearings have been torqued properly, over tightening is easy to do and a common problem on newly replaced bearings. Also if one bearing goes it is sensible to ...
Chris Johns's user avatar
  • 1,586
5 votes

Tire slowly deflates. One click per rotation noise while braking on same tire

I don't see how they could be associated Your tire is mounted to your rim. The rim is mounted to the wheel hub. Your break disc would be, in many cases, mounted by tightening the lug bolts to your ...
DucatiKiller's user avatar
  • 32.9k
5 votes

Audio System Noise-supercharger whine

This has less to do with the audio signal, than it does with grounding. What you have described is a ground loop. You likely have a grounding issue somewhere. Obviously we are not able to tell you ...
CharlieRB's user avatar
  • 9,015
5 votes

Problems with Turbo Engine of Audi TT 1.8L 2005 150BHP

Smoke emitted from the tailpipe is likely either coolant or, more likely given the oil light, engine oil. The "wooooo" noise you described is in all likelyhood a boost leak. The wipers stopping mid-...
Steve Matthews's user avatar
5 votes

Problems with Turbo Engine of Audi TT 1.8L 2005 150BHP

From the description I'd suspect turbo failure.. and I'm sorry to say that if that's the case you're looking at another big bill.
motosubatsu's user avatar
  • 10.1k
5 votes
Accepted

Sheared off exhasut pipe: How to fix without a welder?

To expand on what Mike said, the easiest/cheapest way to fix this is by creating a sleeve. Use some thin metal which is fairly easily bendable. Actually, using a large metal can body like you'd find ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes

truck makes a tapping/knocking sound only happen the first start of the day and stops after truck is warm

Older vintage Silverados had a known issue with piston slap. It is worse in the winter but is always present even in warmer weather. The forums have been saying for well over a decade it has to do ...
mikes's user avatar
  • 19.9k
5 votes

Excessive engine noise and vibration in cabin 09 toyota camry 2.4l

One possibility is that an engine mount has broken. The engine may now be resting against some of the bodywork or other components in the engine bay causing vibrations to be passed into the passenger ...
HandyHowie's user avatar
  • 25.4k
5 votes
Accepted

Loud Knocking/Clicking While Turning Left

Two things come to mind: Before you drive it any further, check the lug nuts all the way around to ensure they are tight. I've seen a lot of vehicles exhibiting what you are talking about have loose ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes
Accepted

Continual knocking sound coming from a front wheel when turning

A worn CV joint is the most likely issue that would cause knocking at full steering lock. What usually happens is a split forms in the CV joint rubber boot which allows the grease to escape and dirt ...
HandyHowie's user avatar
  • 25.4k
5 votes

Can a trained mechanic tell the difference between a rod knock or a timing chain rattling?

Depending on the vehicle, a mechanic should easily be able to differentiate a rod knock from a timing chain rattle. The main reason is, the two noises are completely different. Also, timing chains don'...
Pᴀᴜʟsᴛᴇʀ2's user avatar

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