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

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Motorcycle bore and stroke [duplicate]

Manufacturers often detail bore and stroke in their promotional material and claim 'achieving the ideal compression ratio' How do different bore / stroke / compression ratios affect an engine's ...
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21 views

Excess oil in car engine [duplicate]

Mechanic changd the oil filter forgot to drain the old oil and continued to add the new oil So basically the engine has double the capacity of oil Will this caise damage to the engine
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3answers
85 views

EFI engine car failed Emission test?

i have an EFI engine car (Nissan N16 Super Saloon - 2000yr) i bought it 6monthes ago as an used car. After i bought it, i had check engine lights on, then i drove it to a mechanical shop few times ...
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3answers
14k views

Best Ways to Pass Emissions?

I recently bought a 1989 Mercedes 300E that didn't run. Has a straight-six gas engine. Thanks to the miracle of Seafoam and a lot of luck, I was able to get fuel delivery happening again. I then ...
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2answers
141 views

Motorcycle bogs down under load

I recently did a head gasket repair on my 1986 Kawasaki GPZ1000RX and now that everything is back together it starts up fine, idles fine, and revs high without a problem while in neutral, but when I ...
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4answers
2k views

Why are most engines made with even numbers of cylinders?

Why are most engines made with even numbers of cylinders? Are odd numbers of cylinders somehow less efficient than even ones?
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1answer
338 views

2011 Jeep Liberty ran without oil, did this cause my engine to blow?

I have a 2011 Jeep Liberty and the oil pan rusted out and it was driven for a while without oil. The oil pan was fixed a couple days later. This happened in April 2014, in Oct 2014 the engine started ...
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1answer
32 views

Lawn tractor won't start

Not sure if this is the right stack exchange forum to post this in or not, hoping it is... I have a Toro lawn tractor which is having issues starting. I have been using it fine for the last few weeks ...
3
votes
1answer
54 views

Is a greasy exterior a sign of bad maintenance?

All car's I've had (second hand and between 15-30 years old) have always had a greasy veil over engine components. I understand moving components need to be lubricated but this gives off the ...
2
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1answer
28 views

2004 Volvo S60 starting issue

I am interested in buying a 2004 Volvo S60. The guy selling the car says: "It won't start. When you try to start it. its as if the battery was bad, but it's not" Does anyone know what that means? ...
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2answers
4k views

Effects of driving through deep water WITHOUT hydrolocking (car still bogged down and died)

So, yesterday we had very heavy rains, and unfortunately I was driving in an unfamiliar area of town. I drove through high water, which caused my car to sputter and so I turned around. The car behaved ...
5
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3answers
27k views

Burning smell and faint white smoke

I have a 1999 Audi A4. Recently there is a burning smell when driving that is noticeable when stopped after driving. At night I noticed a faint white smoke blowing out of the front in the headlights. ...
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0answers
85 views

Car turns off when travelling at high speed

I usually keep a speed of 150-160 km/h (93-99mph) on the highway without any problems whatsoever. However, yesterday I decided to go up to 170 km/h (106mph) and the engine doing around 4600 rpm, when ...
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3answers
1k views

Estimate for head removal / reinstall

In changing the spark plugs in my 2000 Ford Mustang GT (4.6L), I sheared one of them (number 3) The ceramic is totally removed, as is the hex nut. The threaded portion as well as the ground electrode ...
2
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1answer
24 views

1999 Chevy Suburban Sluggish Start

My Suburban started doing something odd on starting before, but I'm not completely sure how to describe its behavior. It get's past the battery part fine when it's starting, and the starter motor is ...
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0answers
27 views

Cause of greasy gunk accumulation under exhaust headers

When examining my engine bay earlier, I noticed a large amount of black gunk built up on the bottom part of the engine under the exhaust headers. I removed the exhaust header heat shield and found ...
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0answers
20 views

1999 Jeep Cherokee 4.0L engine

Where can I get a wiring diagram for a 1999 jeep cherokee? I am having problems with a couple fuses blowing in the power distribution center under the hood and it causes the check gauges and check ...
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1answer
38 views

very low speed in fact no pick up at all and lot of vibration of my ford fiesta diesel

I don't know how to maintain a Ford Fiesta diesel car's engine which has lot of noise with no pick up and power steering oil leakage. My car has lot of problems like pick up, speed, mileage, rattling ...
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0answers
35 views

Mitsubishi Eclipse dies while driving, then won't stay on after cranking back up

I drive a 2001 Mitsubishi Eclipse RS 4 cyl. It has a replaced engine from a Galant. The car has started dying on me seemingly randomly - I haven't seen a pattern in the fuel level, time of day, speed ...
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2answers
105 views

Jet ski maintainance

I have two old jet skis, one of which isn't working too well anymore. I'd like to learn how to fix it. I'd probably not be able to sell it for very much anyways. Are there any good books or resources ...
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0answers
17 views

Peugeot 207 gti depollution fault

Car starts rough but runs fine ,no loss of power. check engine light on and depollution system faulty on dash. Local garage scanned car and came up with camshaft sensor fault but they think timing ...
2
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4answers
130 views

Check engine lights came up after Air filter change?

Yesterday I changed air filters in my car (Nissan supper saloon N16 - model year 2000). After installation the check engine light came on when I started the engine and the engine seemed to be running ...
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votes
2answers
6k views

my car acts like its going to stall at a stop

my car drives fine but when i come to a stop light or any stop it acts like it will stall but never does. did some easy things like oil change. no check engine light is on but it seems to keep ...
6
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1answer
149 views

No power at higher RPM

I just had to do some fixes on my 1993 Kawasaki ZR750. I had some rust in the tank so I got it cleaned and sealed. To be thorough I also checked the rest of the system. Here's what I did: ...
4
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1answer
62 views

Why does my car cut off the first time I try to start it?

I'm trying to figure the problem with my 2004 Nissan Skyline I purchased about a year ago. Every time I start my car it cuts right off and for it to stay on I have to press the gas pedal in order to ...
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2answers
61 views

Safe Vehicle Operating Temperature while towing

I have a F-350 Dually that is capable of towing 16,000lbs. I regularly pull 14-15K lbs. I have a programmer that gives me a digital display of both my EOT and my ECT. What would you say is the ...
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4answers
13k views

Car dying at low RPM only after filling up with gas

My question is closely related to one about a Jag dying at low RPM, but is slightly different because it only occurs after refueling and because the problem persists after cleaning the throttle body, ...
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3answers
321 views

Why does GM still insist on push rod engines?

GM continues to design and produce push rod (Over Head Valve or OHV) engines while most of their competitors have gone to over head cam (OHC) configurations for their performance engines. Is there a ...
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3answers
5k views

Lots of oil in radiator, but no coolant in oil and oil is not low

Theres oil in the radiator and the overflow tank of my 2002 GMC Envoy. The oil is fine, and has no water in it. The SUV gets regular oil changes, and the oil presure is fine. Water temperature is ...
5
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1answer
699 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 ...
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3answers
1k views

Manual engine has no power in third fourth and fifth gear when driving up an incline.

When my engine is in neutral it reaches red line with no problem. It also has power in first and second gear. The problem happens when i am driving up a long incline, I will be in third or fourth ...
11
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1answer
287 views

What mechanical revolution is measured in “RPM”?

I do realize that it stands for revolutions per minute, but what are the revolving pieces that are measured? Assuming it is the crankshaft, is RPM calculated by the crank shaft sensor, or by some ...
15
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3answers
734 views

What does a liter class engine mean?

I have had this question for a long time, can I assume that a 1000 CC engine is able to hold a liter (1L) of water content? Please let me know if my understanding is correct, so I can understand more....
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1answer
33 views

2006 Chevy impla 3.5

The coolant is hot and bubbling. The car is not overheating. I changed the water pump, the thermo sensor, thermostat and intake gaskets. Not sure if it sealed completely. Wondering, is it the head ...
5
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2answers
2k views

What is that knocking sound my engine makes when the revs drop too low?

I have a 2013 Subaru Impreza with a 2.0 liter engine and a manual transmission, and when I let out the clutch too fast while in reverse or 1st, sometimes the engine RPM will drop so low that it makes ...
7
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2answers
714 views

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

I have a 2005 Ford Escape 2.3 L engine, there is a knocking type sound as soon as the engine is started and the speed of the "knocking" follows the RPM. How can I be sure that it is in fact a rod ...
4
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1answer
52 views

2003 Dodge Ram 1500 3.7 engine knock

My truck has been making a knocking noise upon acceleration. Today the knocking is constant and louder. What could this be? Pistons? Oil sludge? New motor?
5
votes
1answer
316 views

My brand new bike stopped while running - why? [duplicate]

I purchased a brand new Royal Enfield Classic 350 yesterday. This morning I rode it to my office (around 20 Km), parked in the basement, and in the evening I started to ride home. After 10 Km the ...
7
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3answers
1k views

Do valves rotate over time?

As I was doing my valve servicing, one question came to mind: As valves undergo millions of cycles of reciprocating motion, do they actually rotate or is their position relative to the seal fixed? Or ...
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4answers
348 views

Hyper-miling and stress on engine oil

The other time I asked my mechanic, are my tires about needing to be changed? He said, naw, another 8000 miles. After driving 7000 miles, I asked another mechanic who again said, long way to go. ...
2
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1answer
167 views

How much force is needed to push a piston down? [closed]

Combustion from fuel and air is used to push a piston down. When they combustion it creates a lot of force, my question is how much force is needed to push the piston all the way down when the vehicle ...
5
votes
2answers
48 views

Engine oil sludge

My question is, have ever heard of it making engine oil gel, or turn sludgy if you can call that a word? I haven't, but 05 Chevy Equinox I'm servicing had this happen. Not sure if it started before or ...
6
votes
2answers
50k views

What is the purpose of a drive-shaft?

what is a drive-shaft and why we need it in a car? I do get the point of having crankshaft (using Wikipedia) but still confuse with drive-shaft
2
votes
2answers
35 views

Overheating and more

Hi I have a 2000 Buick park ave v6 3800 series and the problem started as a small leak in the radiator from the little drain plug so I righted that and the leak moved to the whole opposite side of the ...
3
votes
1answer
170 views

Corsa D Stuttering Accelaration with Malfunction Light flashing

I have a 1.2l Vauxhall Corsa D (62 plate) that has done 63K miles. A problem has developed over the last day or two that is becoming a concern, and has got worse over the last 24 hours. Whilst ...
4
votes
1answer
57 views

Heavy noise from the tappet of my RE Classic 350

I own a Royal Enfield Classic 350 (2014 model). After completing 10000 km, I started hearing an irritating sound from the tappet (service guys says so). At that time it didn't last long, so I thought ...
3
votes
4answers
129 views

Diagnostic, diy repair guides, technical manuals

So I was wondering for a list of good diy diagnostic, repair softwares (not obd). I am aware of Autodata, Vivid and Mitchell on Demand. What else do you know? I am also looking for a software that ...
8
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2answers
452 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.
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2answers
455 views

How often should spark plug wires be replaced?

I last replaced them with the plugs about 4 years/60-70k miles ago. I bought platinum plugs I if I remember correctly, so I still got some life on those. The car (2001 Buick Regal) is still in good ...
3
votes
2answers
10k views

Gas pedal not responding

It just doesn't work, as if I weren't even pressing it and it happens regardless of the speed. I have to turn the engine off and on again and it'll work for another 3 or even up to 20 minutes ...