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

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5
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1answer
47 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 ...
8
votes
1answer
129 views

Car stalls/dies suddenly while driving and is not starting again

I own a Indian Make TATA INDICA Ev2 (CR4) Turbo Engine car. I did rebore recently and the mileage was 130,000 KMs. After rebore first service of 3000 km is successfully completed and now I'm facing a ...
8
votes
2answers
225 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
56 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 ...
5
votes
1answer
388 views

Jerks on 2nd gear at low speed

My car jerks on second gear when I slow down while on second gear and then want to accelerate back. After changing the plugs and air filter it got a bit better but after driving 500+ miles it is back ...
4
votes
1answer
53 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
202 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
88 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 ...
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vote
2answers
62 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?
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2answers
49 views

2004 Dakota problems

I have a 2004 Dodge Dakota 4.7. My truck started to shake going down the road. I heard a pop unsure if it was metal slapping or a backfire. Had it towed home and hooked it up to a computer. The codes ...
3
votes
1answer
76 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 ...
6
votes
1answer
105 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 ...
3
votes
2answers
58 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 ...
10
votes
1answer
122 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 ...
7
votes
1answer
93 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?
6
votes
1answer
73 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 ...
4
votes
2answers
109 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. ...
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vote
0answers
20 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 ...
12
votes
2answers
84 views

How to Remove Core Plugs? (aka Freeze Plugs)

I have been removing core plugs from an engine I'm rebuilding with varying levels of violence. The engine block is aluminium and I'd like to reduce the chance of of me damaging it. How do I remove ...
5
votes
1answer
86 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 ...
8
votes
1answer
77 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 ...
7
votes
0answers
53 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
43 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 ...
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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 ...
4
votes
1answer
24 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 ...
8
votes
1answer
61 views

Would bored out 307 need new heads

I have a Chevy 307 with casting number 3970020 and everything I've read says this particular block can be bored out to 4" effectively making it a 327. I plan to have my machine shop test it and make ...
7
votes
2answers
97 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 ...
8
votes
3answers
108 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 ...
9
votes
1answer
228 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 ...
7
votes
1answer
465 views

What is a head?

Due to this question I now have a fairly well-rounded understanding of what a head gasket is. I assumed that sometimes, when people would talk about "heads" that this was just an abbreviation of ...
2
votes
0answers
21 views

What actually is brake horsepower (BHP)? [duplicate]

I know that BHP is the measure of power of an engine. I realised that I have no idea how the number (for example 540 BHP) relates to the engine itself. Does 1 HP mean one rotation of the crankshaft ...
8
votes
2answers
143 views

Natural Gas Engines - What are these things?

Someone I knew when I was younger converted a car to run on compressed natural gas (CNG) because CNG was extremely cheap in comparison to petrol or diesel. How can cars be converted to run on CNG and ...
6
votes
3answers
103 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 ...
6
votes
1answer
74 views

External Combustion Engines - What are these things?

What are external combustion engines? How do they work? What types of external combustion engines are there? What are all the common advantages and disadvantages of external combustion engines in ...
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vote
1answer
25 views

What “type” of engine does a Ford Fiesta, 2008, style climate D, 1.4 TDCi have? [duplicate]

a mechanic asked me this and I didn't know the answer.
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3answers
296 views

Location of exhaust manifold

In four cylinder engines, why are some cars designed with the exhaust manifold towards the front of the car while other cars have it towards the back? Is there any advantage in one design over the ...
8
votes
1answer
51 views

Roller rockers to a stock valve train

78 Nova but the engine is from a different car; casting # V0707CMH. I have a 350 with 305 heads. Stock valves, pushrods, cam, and lifters. The nuts on my stock rocker arms are in need of replacement; ...
9
votes
3answers
671 views

Why does my RPM drop when sitting idle at traffic lights?

While I'm sitting idle at traffic lights I put the car into neutral. The engine stays idling at about 1000 RPM. However every now and then it drops down to about 500 RPM and then quickly back up to ...
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 ...
10
votes
4answers
584 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? ...
8
votes
2answers
519 views

Why is the effect of a bad fuel pump more noticable at higher speeds?

I get that the main effect of a bad fuel pump is that the engine will cut out at higher speeds, and that this is often not easily noticeable until that happens because there are little or no prior ...
4
votes
2answers
59 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 ...
14
votes
2answers
892 views

Why is a W-16 called, well, W?

The term "W-16" seems to imply some sort of configuration that resembles the letter W, which implies three banks of cylinders with one sharing a common cylinder head. In fact, the Bugatti W-16 in the ...
7
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2answers
58 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?
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0answers
80 views

My mechanic forgot to put Coolant and now my car is not work! what can i do? or who should i blame [closed]

I had a small accident and I hit the whole front of my car and the radiator was damage. I took it to my friends mechanic (which i though i could trust) and asked for an estimate. He owes a Bodyshop ...
1
vote
0answers
36 views

The critical components that define an Adv tourer from other motorcycles [closed]

Mainly want to understand the running of an adv tourer. 1) what is the basic difference between the showa suspensions,WP suspensions and an upside down fork? Advantages & disadvantages of the ...
5
votes
1answer
33 views

Toyota corolla verso 1.794 petrol vvt-1-t2 [closed]

Recently Purchased Vehicle @milage 81.075 in the past vehicle has consumed 5.25 Litres of oil a full oil composition test was carried by my Garage. They also advise it is an uneconomical repair it has ...
4
votes
2answers
85 views

What is meant by bore and stroke?

All engine specifications reflect a bore and stroke number. Example Aprilia Tuono V4 R 2012 Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder 998.9 cc / 60.96 cu in Bore x ...
19
votes
4answers
1k views

What are the benefits of a dry sump?

I've heard references to dry sumps, usually in reference to racing engines. But more recently I came across an article about a 'supercar' which stated that it had a dry sump. What are the benefits of ...
7
votes
1answer
197 views

How do old cars actually lose horsepower?

I have heard that when a car gets old it slowly but surely loses its horsepower to some degree. For example, I used to drive a 1997 Ford Fiesta with a 1.25L 1242cc engine that supposedly produces a ...