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

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6
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0answers
91 views

Can you identify this part?

I have just had the cam belt and water pump changed at my local VW dealership on my 2004 VW Passat B5 and on the technical report they were kind enough to point out everything else they wanted to ...
6
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0answers
41 views

Ford F-150 4x2 4.9l straight 6 misses after lots of work

Just seems like plug wire, plug, or something missing shakes whole truck. It's acting like it's starving for gas. New plugs, plug wires, MAF sensor, idle control sensor, cleaned and still can't figure ...
6
votes
0answers
243 views

Remanufactured 5.3 engine not firing on one bank

2007 Chevy Avalanche 5.3 vin 3. Bought a remanufactured engine, after install truck runs only on bank 1 (1,3,5,7). Have power to coil packs on bank 2 (2,4,6,8) but no spark. Put in new cam sensor, ...
5
votes
5answers
2k views

What good is it for an engine to have lower CCs and higher BHP?

I was watching "The Perfect Road Trip 2" by Top Gear, where at some point Richard Hammond is driving a Mercedes A45 AMG. He says that the car develops a whooping 355 BHP, and all that comes from a ...
5
votes
3answers
509 views

Do Most Common Engines Have A Cylinder Head?

I know there are different types if engines. All with different set-ups and designs. But do most engines have a cylinder head? And how many? I know inline engines have one, V-lines have two and radial ...
5
votes
3answers
1k views

What exactly is a clutch?

I found out recently that the flywheel, driven by the crankshaft, is connected to (or part of) the clutch. I have a basic understanding of what a clutch does due to the fact that I know how to drive a ...
5
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2answers
202 views

What does NM@rpm mean in car's spec sheet?

I checked my car's specs sheet this morning and in it I noticed: Torque NM@rpm: 145@4600 What does NM@rpm mean?
5
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3answers
7k views

Are Oil Puddles in Cylinder Head Normal?

Changing spark plugs and one well was full of oil. I took off the valve cover to replace the gasket and noticed that there was quite a bit of oil puddled in the cylinder head. Is this normal or could ...
5
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2answers
113 views

Where does the piston stop after the ignition is turned off?

Compression stroke at TDC or Exhaust at TDC or somewhere else? Is this position fixed or does it depend on other conditions?
5
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4answers
318 views

Can 100% calculated load be reached in neutral?

While searching for information about how is engine load calculated I came across this question which contains an equation for the ECU load calculations. As I understand it under fixed atmospheric ...
5
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3answers
5k views

Does revving a car when cold make it warm up faster?

As winter comes along, I've always thought that revving the car would make it warm up faster, so the heating works better to clear the icy/steamed up windows. Does revving my car at idle to about 2-...
5
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2answers
11k views

What exactly is Honda's i-VTEC technology

I see that almost all of Honda's cars have an "i-VTEC" logo at the back. I googled it and came to know that it has something to do with different cam profiles. Can someone explain? A diagram or ...
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 ...
5
votes
1answer
200 views

Are there any modern diesel engines that require electricity to continue running?

I was reading this question about an owner checking the alternator by disconnecting the battery, which is an easy way to validate on a gasoline engine. The single answer assumes that the OP is ...
5
votes
1answer
158 views

Which engine part is this?

I own a speedboat that is powered by a 5 liter V8 Mercruiser with 200bhp. Yesterday when trying it out for the 1st time this season, 2 things happened: 1 - the boat was always trying to turn left ...
5
votes
3answers
77 views

Is it possible to detect defect of vehicle's engine by examining sound it makes

The idea is: every once in a while I use some imaginary smartphone app and record vehicle's engine sound. Then the app should interpret that sound and say OK/NOK. If NOK I drive to be further examined ...
5
votes
2answers
128 views

Basic operation of a choke valve

As user Steve Matthews pointed out on my last question Car interior rattles on idle The ideal use of a coke is "Use the choke until the car warms up properly. You can reduce the amount of choke ...
5
votes
4answers
5k views

Can I use high temp RTV instead of a gasket?

I read somewhere that I can use RTV silicone instead of a regular rubber gasket as an engine seal. Is this feasible?
5
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2answers
3k views

Do fast cars need to occasionally be driven fast?

In the broad spectrum of cars, there's higher end models with sport-focused engines. Examples would be an BMW M3, and even more so Ferraris and Koenigseggs etc. Apparently they're more fussy, in that ...
5
votes
2answers
104 views

Can a full teardown of my 318 TDS (1996 1.7 Gasoil) E36 engine have bad side effects?

I would like to get more acquainted with the engine of my car, learn mechanics, and also just clean the engine of accumulated dirt and grime. As such, I am considering tearing down the engine. For ...
5
votes
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 ...
5
votes
1answer
398 views

Possible cause for piston melt in CNG 6 cylinder?

I don't have engine overheat complaint. There was sufficient engine oil and coolant. Oil pressure also at specified rate? Always I am having this issue on first cylinder at maximum time?
5
votes
3answers
603 views

Should I avoid full throttle when driving with a cold engine?

Apparently I should avoid full throttle until my engine temperature is warmed up fully (to 90 degrees on the gauge) Normally I just get in and drive normally after about 10 seconds, and then after ...
5
votes
2answers
678 views

Reboring a cylinder: compression ratio of new piston

I'm going to have the cylinder of my 2004 TT600RE motorcycle rebored (because it's damaged, not to increase power). The manual says the piston size is 95mm and the compression ratio is 8.5 : 1. I'm ...
5
votes
3answers
5k views

Ford Taurus common oil leak area?

On my last oil change, the technician noted some oil around top and side of the engine block and said there is a small leak. The only way to find where it is coming from is doing the whole dye test, ...
5
votes
2answers
11k views

Engine never warms up (actually: it cools down) at highway speeds

I have a 1997 Caravan (base model) and normally on my drive to work and my highway drives in rush-hour, the engine warms up just fine. I took a road trip for work, about an hour and fifteen minutes ...
5
votes
2answers
2k views

Why is cold-start fuel mixture enrichment necessary?

I know a rich mixture is more fuel added than air in the ratio required (14.7:1), but how can it affect anything? I mean, if fuel is added but with no air it can't combust, so how can that affect the ...
5
votes
3answers
3k views

Why are drive by wire systems so unresponsive?

Purchased a honda Fit seeing their reasonable price and good engine power. However I have a lag between me pushing the pedal and the engine responding. I constantly have to downshift to get any power ...
5
votes
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, ...
5
votes
2answers
181 views

Reaching top speeds to maintain engine tuned

I live in Central America. Driving is different than in 'Western' countries. Roads are often in bad shape, and it is very common to encounter people / cows / carts / painfully slow cars on the '...
5
votes
2answers
35 views

Ignition timing of 4 stroke two wheeler

Gentlemen, So I work in this lab with a small dyno for a two wheeler engine hooked onto it. The engine hasn't been used for years and I had to correct few things in the wiring. I had to remove the ...
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 ...
5
votes
3answers
172 views

I drove my car with the dipstick left out, did I do any damage?

Please guide me. I went for a regular check up of my new Celerio gasoline driven car. The Maruti Workshop mechanic made a mistake. He left the dipstick out after he checked my oil. I figured it out ...
5
votes
2answers
84 views

Do I need to worry about varying boost pressure when installing an electric supercharger?

Do I require to vary the boost pressure with respect to an increase or decrease of throttle (engine rpm)? *Note: The supercharger is electrically driven (motor) and not by engine crankshaft.
5
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2answers
75 views

2004 VW Passat B5 Peculiar Engine Noise

Recently I have noticed that whilst driving there is a very high pitched whining coming from the front of the car. On closer visual inspection with the engine running I opened the bonnet to try to ...
5
votes
2answers
985 views

Is it important that the gasket on the dipstick make a seal against the dipstick tube?

I just did an oil change on my 1995 Nissan Altima, and noticed that the gasket on my dipstick does not make a seal inside the dipstick tube. The inside diameter of the tube is maybe 3/32 of an inch ...
5
votes
3answers
8k views

What does it take for a modern muscle car to sound like a classic muscle car?

To preface, I would grade my exhaust knowledge with a "B-". I know what the major components are and what they do, but I don't know if and when certain exhaust parts became mandated or introduced ...
5
votes
4answers
14k views

My battery was too low, and now my check engine light is on

I've noticed it in the last year (2013) that my 2008 Jetta with the original OEM battery would be taking a little longer to start than before, sometimes (but very rarely) not starting in the amount of ...
5
votes
2answers
681 views

Does the a gasoline or diesel engine supply fuel at high speeds when not pressing the pedal and more

Let say I directly connect a small engine to my bicycle, and that I'm superman who can overcome any force. Then I start cycling (using my legs...) - the engine starts to rotate, even though I haven't "...
5
votes
2answers
143 views

What is the difference between “multi port” and “combined port” fuel injection?

I have heard these terms tossed around quite a bit and I understand that fuel injection is needed in order to inject fuel in to the engine (from a fuel rail/injectors?). What is the difference ...
5
votes
2answers
197 views

Water leaking into frame case/engine?

I just had my 2012 Mini Cooper S (66K miles) repaired last week last week for a failed/leaky water pump. My car had an episode where it overheated and shut down and wouldn't start after pulling over ...
5
votes
2answers
295 views

Ditch water in radiator

I lost a coolant hose going down the road and all my antifreeze was gone. I found a puddle along the road and filled my radiator back up after I fixed the hose. Will this cause electrolysis in my ...
5
votes
2answers
1k views

Royal Enfield Classic 350 - Motor Break-in Best Practice

How many km's should be driven with a lower speed to setup the bore for a Royal Enfield Classic 350, what is the minimum speed for that duration and how many km's should we maintain that lower speed?
5
votes
2answers
394 views

When do engine type and mileage of a car affect pricing?

I'm currently designing a customer relationship management tool for auto shop owners and was wondering: Does engine type or the odometer value of a car ever affect pricing for a customer? What ...
5
votes
2answers
3k views

BMW 330D 2001 E46 Turbo Charger not working as expected after changing

I have a problem with my car. My car: BMW 330D, 135kw, 2001 year, E46. A week ago my turbo charger got broken when I was driving. There was a lot of white smoke going out of exhaust and there was ...
5
votes
2answers
86 views

Engine sputters when turning left corner

In my 1986 Ford F-150 (carbureted) when I go left around a corner, the engine sputters. Feels very similar to running out of gas, but it picks back up once I stop turning. Only happens in a sharp ...
5
votes
1answer
91 views

Are there any vehicle engines that don't have a mechanical oil pump?

I my answer to How to move car a small distance without tow dolly I suggested putting a manual transmission vehicle in 3rd gear while towing with a rope or strap to apply back pressure and help keep ...
5
votes
2answers
65 views

What exactly is an intake manifold?

This is one of those phrases I have heard a lot but never bothered to ask what it meant. Until now. What exactly is an intake manifold?
5
votes
1answer
109 views

How to increase horsepower? [closed]

How can you increase horsepower on an engine through general modifications without modifying the internals of the engine? Are there benefits or tradeoffs from doing so? What kind of things could I ...
5
votes
2answers
836 views

What is the “dollar bill” test?

One of the questions recently made reference to an exhaust failing the "dollar bill" test. How does one perform it and what does it tell you?