18
votes
5answers
1k views

What is regenerative braking and why don't we use it?

I know that many electric cars use regenerative braking to enable the car to become more efficient by converting what would otherwise be lost heat energy in to a more useful, reusable form of energy. ...
16
votes
11answers
72k views

Wheel stuck or fused to drum

1997 Chevy 1500 My right rear wheel is stuck or fused to the drum. I can get the lugnuts off, but no luck getting the wheel off. I took it to a tire place and they couldn't remove it either, and said ...
16
votes
1answer
577 views

What is the difference between a 180° V4 and a true boxer motor?

Reading this thread which talks about V4 motors, I am wondering what exactly is the difference between a 180° V4 motor you'd find in a Subaru and a true boxer (or horizontally opposed) flat 4 cylinder?...
15
votes
1answer
3k views

Why does diesel engine need a warm-up before the start-up?

When starting up, diesel engine needs approximately 5s before turning the key for ignition. Why is this neccessary and what can be damaged if you don't do that?
14
votes
5answers
79k views

Is it possible to harm your car by giving someone a boost?

This post explains why it's a potential hazard to clip to the negative post on the dead battery when giving a boost. But I've also been told that I could damage the electronics in my own car if I give ...
14
votes
4answers
2k views

Why do 5- and 6-speed transmissions typically need different gear ratios?

My 2013 Subauru WRX has a 5-speed manual, and I long for it to have a 6th gear when cruising on the highway. A friend has a 2012 Subaru STI with a 6-speed manual, and I noticed his car runs through ...
14
votes
11answers
5k views

Why does stopping and starting a car in heavy traffic burn more fuel?

Why does stopping and starting a car in heavy traffic burn more fuel than simply coasting on a highway at 55 mph?
14
votes
3answers
1k views

Afraid to crank engine - how can I tell if my cylinders are flooded with water?

Backdrop We had really heavy rains here today. I was in my '99 M5, idling in traffic when I noticed the brake pedal feel became really notchy. When I let go of the brakes the pedal would not travel ...
14
votes
5answers
483 views

How do I remove a broken drill bit from metal?

I was building a mount for my custom bobber. My 1/4" carbide drill bit broke off into 3/4" plate of steel. How do I remove it?
14
votes
1answer
2k views

What is a governor and what is it used for?

I was watching a classic car restoration program on YouTube in which they were working on a '50s Cadillac with an automatic transmission. The mechanic in the video diagnosed a transmission glitch as ...
13
votes
2answers
174 views

Cold temperatures and tire pressure light

I have 2013 Nissan Rogue. I live in Toronto, Canada, so it is very cold here right now. I understand that cold temperatures can cause the tire pressure light to come on, but will it actually affect ...
13
votes
1answer
323 views

Replace car batteries with capacitors?

I recently watched this video on YouTube which basically shows the guy replacing a larger capacitors with some smaller capacitors which he had bought. The larger capacitors were actually in place of a ...
13
votes
5answers
32k views

How to test for defective glow plugs?

On a diesel engine, how can I know which glow plugs are defective, and can I change these only?
12
votes
3answers
369 views

Diesel Engine Runaway - What is it?

I was watching some youtube videos and diesel engine runaway videos started to pop up where apparently the diesel engine runs out of control until it destroys itself. My Question What is diesel ...
11
votes
1answer
184 views

“Valve like” noise after modifying camshaft ninja 300

A friend and I bought a modified camshaft for his ninja 300/EX 300. After installing and checking/adjusting valve clearance everything seemed ok. After a few laps on our local track the bike started ...
11
votes
1answer
418 views

Why has white powder formed on metal parts after cleaning with degreaser and what can I do about it?

I just cleaned much of my engine compartment with Abro Heavy Duty Degreaser, and I noticed that on certain metal parts like the valve cover, thermostat housing and transmission housing a white powder ...
11
votes
4answers
4k views

What happens if unsuitable oil is used in a vehicle engine?

I recently heard an urban legend-like story about a guy in a developing country who decided engine oil was too expensive and so used some vegetable oil instead. The story says the car ran for some ...
11
votes
1answer
263 views

Cleaning brake fluid (general tips)

There are some other threads on other websites about cleaning up brake fluid. But I just wanted to get a more organized, concise answer here on SE. Wanted to confirm that cleaning up brake fluid just ...
11
votes
1answer
737 views

Brake Specific Fuel Consumption of 2-stroke vs 4-stroke

How much fuel do various types of engines burn per power output? I'm especially interested in naturally aspirated piston engines, and comparing two-stroke to four-stroke. The wikipedia article gives ...
11
votes
1answer
126 views

How does a dynamometer work?

I don't have much to add here. Pretty simple. How does a dynamometer work? How are Horsepower and Torque measured as separate figures during a single dyno run? There are quite a few components and ...
11
votes
3answers
7k views

What are the possible causes of vibrating steering wheel?

What can be the cause of a vibrating steering wheel when driving faster than a specific velocity (let's said 60 mph). How to discriminate one cause from on other ?
10
votes
2answers
587 views

How to I stop the 'never-ending' turn signal?

I have an '07 Chevy Malibu, whose turn signal doesn't seem to disengage whenever I make a turn, unless it's more than roughly 160 degrees (a U-turn). What are some of the possible causes and are ...
10
votes
2answers
2k views

How do variable-length intake manifolds work?

I have heard many vehicle manufacturers have been using this to improve power and torque figures. They do this by altering the length of the manifold, I am hoping for better diagrammatic explanation.
10
votes
1answer
5k views

What are the tell tale signs of a catalytic converter that might be going bad?

I've owned two vehicles whose catalytic converters were recalled due two a couple of reasons: one being the quality of the CC and the other being a reduction in power due to a material building up and ...
10
votes
1answer
231 views

Are there downsides to making an accessory socket always live, if accessories are removed when not in use?

In some cars, the power line from the battery to the accessory outlet (aka cigarette lighter socket) is always live. In others, it's off until ignition. It seems pretty much random which cars are ...
10
votes
1answer
5k views

How important is it to use a real flare nut wrench when removing the fuel line on an old Ford tractor?

An article on overhauling the carbs on a Ford 8N tractor says to use a flare nut wrench to disconnect the fuel line. How important is it use that kind of wrench, vs. an open ended wrench?
10
votes
4answers
10k views

How do I apply dielectric grease to my battery?

I recently had a new battery installed in my 2006 Subaru Forester. The shop did not use any dielectric grease, just connected the leads to the terminal and that's it. What is the preferred method of ...
10
votes
1answer
99 views

Is it possible to fit mashroomhead air filter in Honda Stunner CBF 125?

I have Honda Stunner CBF 125 2009 model. I just need to know is it possible to replace the typical air filter with mashroomhead air filter to improve the bike performance? Is there any other way ...
10
votes
1answer
522 views

How to remove the 50 amp, 80 amp and 100 amp fuses from the positive terminal of a RAV4?

I want to check the fuses at the positive battery connection of my 1998 (first generation) Toyota RAV4. Visually, the 80a and 100a look fine, but the 50a has blue deposits and I can't tell if it's ...
10
votes
1answer
579 views

Thread on bolt - what happened?

This is a follow-up question to Seized nut & bolt - difficult to access What happened - or what did I do wrong - for this bolt to lose its thread in this way? Is it simply doing it up too ...
10
votes
1answer
806 views

What type of Ferrari's came with wire wheels?

I always thought wire wheels was a British thing but recently I saw a very neat looking Classic Ferrari with wire wheels. Was this odd for an Italian car? Did they come stock with these or was it just ...
10
votes
3answers
20k views

How do I safely siphon gas from a tank?

Our 2003 Windstar was recently totaled in an accident (everybody's ok). This happened the day after we filled the tank. Before we hand over the car to the insurance, we'd like to get the fuel out of ...
10
votes
4answers
5k views

Why did V4 engines never take off?

I read that Ford Taunus (not to be confused with Taurus, it was a small model for German market) used to be made with a V4 engine but that's about it. How come V4 never became more used in modern ...
10
votes
3answers
909 views

How to test a bolted-in heavy duty 50a / 80a / 100a fuse with a multimeter without removing it?

I want to check if this particular 50 amp fuse on a RAV4 (1998 first generation) is blown or not. Just looking, it's hard to tell because of what I assume are blue-green deposits on copper (this is ...
9
votes
3answers
2k views

What are the causes of fluctuating intake manifold vacuum

I have a 2005 Honda CBR600 F4i which suffers from occasional hesitation at low rpm when accelerating. I also get occasional fault codes from the ECU indicating a vacuum leak. Today I connected a ...
9
votes
1answer
152 views

What is the yellow precipitate in my outboard's carburetor?

I've got a 2008 Tohatsu 9.8 HP four stroke outboard. My low speed jet keeps getting fouled and on several occasions, I've found yellow almost crystalline "growths" for lack of a better word inside ...
9
votes
1answer
52 views

Lada Niva 1700 Carburetor Model

The compression is good and does not burn excessive oil .Fuel consumption has dropped from 8 kilometers per liter to 5.7 kilometers per liter.Same driving cycle same location. What should I look for?
9
votes
3answers
1k views

How to prioritize repairs?

My car needs some work, but I don't like taking out too much debt and my savings are sort of depleted for the moment, so I need to do a little at a time. How can I prioritize the work that needs to be ...
9
votes
4answers
3k views

Is it OK to skip gears?

I'm not sure if this is on topic, but I'd like to know the answer before it comes a repair question. I have a Y2K Triumph Speed Triple - great bike. First gear comfortably takes to 90km/h. Needless ...
9
votes
2answers
16k views

Brakes make grinding noise during stops at low speeds

I've got a Mazda B2300 pickup that's started making a grinding sound whenever I come to a stop. Braking at a high speed doesn't make any noise, but once I get under 25-30 MPH, the grinding sound gets ...
9
votes
2answers
18k views

Huge puddle of water under car

I parked my Dodge Viper after driving for about two hours (in July, ~90°F, AC at full blast). Half an hour later I noticed a huge puddle under the engine, on the passenger side. I am pretty sure it ...
9
votes
2answers
277 views

What are Performance Camshafts?

I read the following question recently: What is it about performance cams that make engines produce more power when they are installed? I know there are a few components for cars that have "cam" ...
9
votes
0answers
62 views

Torque convertor shudder?

I drive a 2011 GMC Sierra 2500HD ex-cab 2wheel drive with a 6.0 gas engine and a six speed 6L90 automatic transmission. I have started noticing what I believe is called "shudder" from my tranny under ...
9
votes
2answers
265 views

What are the visual signs that brake rotors must be replaced?

Let's say you take off the wheel (when replacing the pads, for example) and look at the brake rotor. What are the signs that it's time to replace the disc? Let's stick to clear visual signs that don'...
8
votes
2answers
434 views

Will a ground to the frame work properly if the bolt is powder-coated?

Would there be any electrical issues if a grounding point had a bolt welded and powder-coated or is it better to drill a hole, weld a nut to the frame and then powder-coated?
8
votes
1answer
300 views

How to fix freezing locks

Does anyone know how to prevent locks on car doors from freezing, this is usually only a problem in older cars. I'm not thinking of solutions like WD-40 that really only work for a few days and then ...
8
votes
2answers
447 views

How to test if oil is leaking into combustion chambers?

How can I test whether oil is leaking into cylinder combustion chambers and getting burnt in case of oil level loss? As opposed to, for example, leaking through the oil pan or the timing chain cover.
8
votes
1answer
648 views

Proper way to do maintenance on an air bag system (SRS)?

My air bag system light started coming on a while ago. Sometimes it will come on and stay on, other times it will go off after a while. This usually happens when it starts raining out. I did some ...
8
votes
2answers
195 views

Shutting off fans at highway speeds

On my vehicle (92 Civic) and most others I've seen, the condenser fan comes on whenever the A/C clutch is engaged. This seems like a waste of electricity (and thus fuel) when cruising at 60-75 mph, ...
8
votes
6answers
28k views

Stubborn oil drain plug caused by hot oil?

I'm trying to change the engine oil but running into difficulties removing the oil drain plug. One of the instructions I followed to change the engine oil was to give the car a short drive prior to ...

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