Internal Combustion Engine. Most engines in road going vehicles are 4-cycle internal combustion gasoline engines.

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3
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2answers
1k views

“tick-tick” sound in Enfield Clasic Motorcycle

BIKE ENFIELD CLASSIC 350 2013 Model ODOMETER: 14000 One and half year old Oil changed one and half month before general servicing. There is a particular sound from the engine while riding ...
0
votes
1answer
57 views

Turbo shaft broken [closed]

Ford Fiesta 1.4 diesel TDCI There was a rattling noise. Checked and found that noise is due to damaged turbo turbine. So turbo replaced. But after replacement with new turbo and 10KMS road test, the ...
9
votes
2answers
398 views

Why do Formula 1 cars use engines with many volumetrically small cylinders?

What's the benefit to Formula 1 using engines like a 3.0L V8 or a 2.4L V8? I read this Reddit discussion on why it's not practical to put small many-cylindered engines into production cars. Cost ...
7
votes
1answer
205 views

Why do electric motors produce peak torque instantly vs gasoline engines

On a separate forum someone had asked why do electric cars do not have a transmission. The simple answer was that electric cars produce peak torque at any RPM but the gasoline engine needs to rev ...
7
votes
2answers
153 views

Okay to add new oil to old?

Title pretty much explains, I change my oil every 4-6k miles depending on how generous I’m feeling, however will the oil dirty oil that’s already in the sump mix with the clean oil when topping up? ...
4
votes
1answer
52 views

what is the normal operating temperature indication on the guage?

My radiator got a leakage so I made a direct connection to the fan from the battery i.e. irrespective of the engine temperature the fan would start as soon as you turn on the ignition switch on. It ...
6
votes
3answers
161 views

Loss of engine power when using headlights

i have a nissan march 2003 (K12). when i turn on the headlights, it loose its engine power. alternator and battery are ok. anybody knows what would be the cause? thank you in advance. additional ...
6
votes
1answer
119 views

Ticking noise while idling that increases with acceleration

2013 Chevy Cruze. 86000 miles. Our car has been ticking while idling, and the noise gets louder and faster when accelerating. Oil has been changed regularly. Water pump was changed recently due to a ...
5
votes
1answer
45 views

1995 Dodge Viper

So my friend is interested in this 1995 Dodge Viper he's seen on a pre-owned showroom and I have some questions that I'd like to ask. What kind of questions related to that specific car should we ...
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2answers
51 views

Overfilling the oil level [duplicate]

I recently had my oil changed on my 2004 Buick Century. Does overfilling the oil level harm the engine?
11
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3answers
19k views

What disadvantages a car with 4-speed transmission have compared to 5, 6 or 7 speed with similar engine?

This seemed to be most relevant site to ask my question. I am planning to purchase a new car and my shortlisted car has 4 speed automatic and 1.6 litre engine. The thing that worries me is that it ...
3
votes
1answer
96 views

Which operations are done when key is turned to On position?

I would like to know which operations or functions does the car do when I turn the key to On position (the key position before starting the engine) in gas engine and in diesel engine. For example, in ...
5
votes
2answers
93 views

Very slight arcing of good spark plug wires

While looking for the reason of occasional misfires I checked if my spark plug wires are arcing at night. There was no textbook arcing with popping sounds and pretty lights, but there was extremely ...
8
votes
2answers
177 views

Follow up question on spark plug heat range

@vini_i gave a great answer to my previous question here (What is spark plug heat range) Part of that answer is that the reason for spark plugs having different heat ranges is that if it runs to ...
3
votes
1answer
50 views

Engine Temperature from OBD data

Engine Coolant temperature is obtained from OBD. But there is no PID to get engine temperature. Obviously, they are related, rather proportional I guess. But can there be a case where my engine is ...
9
votes
5answers
97k views

Car shakes when in gear at red light

I bought a '96 Toyota Camry about a month ago. When I first turn the car on and the engine is cold, I can have the car stopped (in gear) and it will not shake. The idle RPMs will be at 1000. After ...
7
votes
3answers
2k views

What kind of engine oil should one use in a diesel?

I got an 1987 Toyota Land Cruiser with a 2H diesel engine. I never changed oil on a diesel engine prior to this truck, so I'm a little confused. Toyota Factory Shop Manual recommend API CC oil type, ...
6
votes
1answer
87 views

What is spark plug heat range

I was watching a show and their project was adding a bolt on turbo kit. In the process they mentioned that they needed a colder spark plug. What does a hot or cold spark plug mean? What changes ...
3
votes
1answer
64 views

Hours of labor required for 2007 Altima 2.5 engine refresh/rebuild

The cost obviously depends on the mechanic's hourly rate, but I know that the manufacturers provide authorized dealers with a guide of how many hours each service / job should take. However I can't ...
3
votes
2answers
55 views

Why might you choose to change to using an aftermarket throttle body?

I have heard that some people might want to buy an aftermarket throttle body. Is the reason for this simply to replace a broken one or are there also other specific advantages (and disadvantages) to ...
6
votes
1answer
90 views

What is the effect of the throttle body on the power curve produced by the engine?

I heard from another member of this community that the throttle body, among other things, has the ability to change the power curve of the engine. What exactly is a throttle body? How might the ...
7
votes
2answers
55 views

Proper glow plug operation

Are glow plugs supposed to stay on after the engine has started to help with the firing of the first few revolutions?
8
votes
2answers
259 views

Fiat Punto Wont Start. Fuel Light & Three warning lights flashing

My Fiat Punto 1.2 Year 2000 MK2 (I believe) will not start. The engine turns over but the car won't start. The fuel light is flashing and petrol gauge says empty which isn't the case. There are three ...
12
votes
4answers
317 views

2000 VW Polo struggles to/won't start when engine warm

My 2000 1.4 petrol polo struggles to start when warm and sometimes will not start, until the engine has cooled down a bit, when the engine is on the hot side of warm. Embarrassingly, I have lived ...
10
votes
1answer
117 views

Coolant Reservoir

Two questions, One, is there any reason why some coolant bottles are shaped in this way? Two, if this coolant bottle was placed on its side such as in the image below for example would coolant ...
18
votes
2answers
1k views

Why do we need to cool air after it leaves a turbocharger?

When we are using a turbocharger to compress the incoming air, the air gets hotter. Usually this hot air is cooled by using intercooler before it is passed to the engine. But what is the reason ...
10
votes
4answers
371 views

Can you run an engine without a radiator?

I've heard of people starting engines in a build without a Radiator hooked up, to see if it fires. If you have an old engine and want to see if it will run: Can it be started without a radiator? ...
9
votes
1answer
6k views

Does stalling damage my car?

I sometimes stall my car, as I have a new one and the biting point is so high. Anyway, someone told me stalling damages my car, but all it does is force the engine to a stop... Does constant ...
20
votes
4answers
2k views

How do you un-seize an engine?

I have an older engine that is seized. It is a 1953 Desoto Hemi. How can I un-seize it? I have sprayed Sea Foam Deep Creep down the plugs and let sit for weeks. As well as transmission fluid. To no ...
6
votes
1answer
69 views

What is the problem if my car's engine stops running in the middle of a ride?

My car's engine frequently stops in the middle of a ride. Its an old model of Hyundai Sonata 2004. This happens especially in high gears(3,4) and faster speeds (like 60-70 mph). It has also happened ...
7
votes
1answer
83 views

What is a Blower?

I've heard of this component being used on Hot Rods. What is a blower? What does it do? Are there specific requirements for utilizing one? Are there any disadvantages of using a blower?
4
votes
2answers
1k views

Spark Plugs 1998 Buick Lesabre

Where are the spark plugs in a 1998 Buick Lesabre? Pictures would be helpful as I'm a novice at this type of thing. I'm assuming I need all six because I'm getting a check engine light saying number 6 ...
2
votes
1answer
170 views

Engine sound rumbles/grumble noise 800-1300 RPM

A 2000 Toyota Celica GTS 225k miles engine makes a mild rumbling/grumbling rough sound when accelerating slowly from a stop in drive or reverse only in the 800-1300 RPM band. Does not occur when in ...
4
votes
2answers
107 views

What is wrong with my car?

My car had a broken piston, and broke down completely. I bought a new engine, and had it installed. everything seemed to be working aside from a low clicking sound when driving coming from the engine. ...
5
votes
1answer
76 views

Brake Mean Effective Pressure, how is this an effective measurement tool for engines?

Many engine designers measure success with Brake Mean Effective Pressure What are the equations used to calculate Brake Mean Effective Pressure? Why is this a more or less effective measurement ...
6
votes
3answers
102 views

Steam Engines - What are these things?

I know that steam engines are considered to be old fashioned, impractical and rarely used. Why are they considered impractical therefore rarely used? How exactly might a steam engine work to power a ...
9
votes
1answer
191 views

How does intake manifold runner length effect the power curve of a car?

Recently I learned that a number of things such as the cam profile, compression ratio and the intake manifold runner length and volume can all effect the power curve of the engine. Here is an ...
15
votes
6answers
2k views

Why or why not increase engine efficiency by running the car “fuel-lean” (using a turbo or supercharger)?

Everyone wants their cars to use less fuel, right? I read the following passage about running the car fuel lean from this website: Run the engine fuel-lean, that is, use excess air. It is well ...
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0answers
19 views

1999 Ford F250 xlt super duty

My truck has the 6.8l V10 Triton engine in it when I got it there was a lot of oil in the cooling system but no water in the oil it ran hot once but didn't do it again would it be the head gasket and ...
8
votes
1answer
71 views

Pneumatic Valve Spring Operation in Formula 1

In the 2006 Formula 1 World Championship the rules allowed for pneumatic valvesprings. These engines were required to have a 90° V8 engine with 2.4 liters of displacement, 4-valve-per cylinder layout ...
23
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1answer
2k views

Changing Firing Order in a 4 Cylinder Car

Backstory In motorcycling you can get cams that change the firing order and time from a traditional 1,3,4,2. It's was very common in American roadracing in the 1990's to hear 4 Cylinder engines that ...
4
votes
2answers
53 views

Why does my car die completely (after a battery recharge)?

Recently, the keys in my car were left in the ignition in the 'on' position and my battery was drained. I posted a question about replacing v. recharging (24930). I removed the battery from the car ...
7
votes
0answers
52 views

My engine stalled and wont restart - after downshifting - Automatic Trans [closed]

My engine stalled and wont restart - All I did was downshift... 2005 Chrysler Town & Country Limited. V6 - 3.8 Liter EFI. For some history, a couple days ago I noticed a clicking sound - it ...
3
votes
1answer
35 views

1995 Mercury Grand Marquis, loud whine corresponding to engine revving

My '95 Grand Marquis (or as I like to call it, a Grandma Rquis) is suddenly very loud. There doesn't seem to be any issue with the performance, and when it's idling, it's as quiet as can be. I'm ...
6
votes
2answers
22k views

Coolant/antifreeze leaking out of engine block (See photo/video)

I'm not sure exactly what is going on with my vehicle ('98 Wrangler, 4.0L), but it's pretty obvious something is wrong. I think I might have had some minor coolant leaking after the past few times ...
4
votes
1answer
23 views

Valve Guide Replacement - 1988 Jeep Wrangler

I've done some valve guide replacements on motorcycles. In the process I've typically done I heat the head up in an oven to about 300 F and shoot nitrogen into the guide which shrinks it and it ...
7
votes
3answers
6k views

Motorcycle popping on acceleration

I have a 1975 Honda XL250 that I bought earlier this summer. Up until recently its been running great. It was leaking a little gas, but nothing too serious. When it started to get worse, I opened up ...
7
votes
2answers
85 views

How can head port volume affect the power curve of an engine?

Recently I learned that even more things other than the ones already mentioned here can effect the power curve that is produced by the engine. Here is an example of one. I understand that there are ...
12
votes
7answers
14k views

Engine oil change and getting rid of old oil completely

After running the vehicle for a certain distance usually we will change the engine oil. This will not only give engine new life with the brand new oil but will also get sludge and other sediments out ...
8
votes
3answers
102 views

What are common cold weather starting issues with cars?

Based upon the current weather in parts of the Northern Hemisphere, I would imagine there are some people suffering from all manner of cold related vehicle issues. What are some of the leading issues ...