General internal combustion engine questions.

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3
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0answers
186 views

Engine oil leak from motorcycle

I'm having this peculiar problem. There is an engine oil leak from my 160 cc motorcycle. The thing is that, I got the engine oil changed couple of days back, by a nearby mechanic. Now the problem is ...
3
votes
0answers
136 views

2003 Suzuki Katana 600 shuts off after running for 10–20 seconds [closed]

My 2003 Suzuki Katana GSX600F shuts off after ten to twenty seconds after start. It doesn't spit and sputter, it just shuts down. I have loosened the bowl screws while it's running and confirmed that ...
3
votes
2answers
506 views

97 GMC k1500 missing badly. Ignition system problems?

I have a 97 GMC Sierra k1500 with a 305 (5.0L) engine. It seems like every year for a few years now it will suddenly start missing very badly. There will be random misfires on all cylinders almost ...
3
votes
1answer
123 views

Corsa Sport (2007) low compression cylinders 2 & 4

I have been having trouble with my Corsa. It sometimes just cuts out or does not want to start at random times. I have had the car serviced, I have had the starter motor replaced & am now having ...
3
votes
1answer
351 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 ...
3
votes
1answer
108 views

How to reach bolt at the rear of BMW M41 Engine?

I can't manage to properly reach the top right screw (zoom picture of it on the second picture). How could I do that ? (the tool I have is too long to be able to go on the rear, there is nearly no ...
2
votes
5answers
6k views

What modifications need to be made to an engine to enable higher safe RPMs?

I first had this question while playing a racing game - it was a touring race with BMW 320i's, and I noticed that I could rev up to 8,500 RPM before shifting gears. Now my car (an older 320i), ...
2
votes
2answers
1k views

What is the specificity of Formula 1 engines, that enables them to reach 18.000 RPM?

Are they made the same way as classical engines ?
2
votes
2answers
23k 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
3answers
4k views

Blue-ish smoke coming out from the exhaust

I have a VW Golf mk4, 1.9 TDI from 2001 with 230.000+ km on board and for some time now I have blue smoke coming out of the exhaust. The problem aggravates when I'm stuck in traffic or when the ...
2
votes
4answers
600 views

Car engine starts only for a fraction of a second and doesn't anymore?

Recharged the car battery, dashboard lights all on, starter motor producing the starting sound. Engine not starting. After seeing this question, I cleaned the solenoid brushes and at the first turn of ...
2
votes
2answers
1k 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 ...
2
votes
3answers
130 views

When should we change the machine lubricant? Cold engine or hot engine?

According to the manual, we should change the lubricant when the engine is still hot to easy the lubricant flow out completely. But from other perspective, loosening the bolt at the high temperature ...
2
votes
1answer
286 views

Where to pour oil into the engine (BMW E34)?

As the title says. Also, how to open the access point (if it non trivial). (It's an M50B25TU engine)
2
votes
2answers
5k views

Why bikes with gears are preferred when there is gearless(or automatic gear) technology?

I know that lower gears have higher acceleration & low top speeds and higher gears have low acceleration & higher top speeds. But I would like to know why this gear system was designed first ...
2
votes
2answers
81 views

What is Variable Valve Timing technology?

Recently when I visited a car showroom the salesman pitched the car by saying it has VVT technology which is superior compared to other cars. I researched and found out that it alters the valve ...
2
votes
3answers
93 views

How do I reduce engine idling rpm without stalling it?

Considering idling losses are present in every engine, reducing the idling rpm might be providing significant savings. But, as I noticed on my bike, the chances of engine stalling increases with ...
2
votes
2answers
48 views

Engine doesn't want to stop

I have a '59 Nash Met. with a straight 4. It runs great, but when I turn it off the engine continues to run for up to a minute, sometimes violently shaking as it comes to a halt. Any idea what causes ...
2
votes
3answers
2k 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 ...
2
votes
3answers
737 views

Problems in building higher displacement 2 stroke engines

I understand(from preliminary research) that when engine gets bigger(higher displacement) it is practically not possible to have a two stroke engine. What are the implications in building a higher cc ...
2
votes
3answers
142 views

Should I clean the engine area

Should I clean the engine area to remove years of built up grease and dirt? What are the benefits?
2
votes
3answers
3k views

92 Civic engine won't start after replacing head gasket

I just replaced the head gasket in my 1992 Civic. Started it up before putting everything back together (just a second since it had no coolant, exhaust wasn't connected, etc.) and it ran fine. But now ...
2
votes
2answers
93 views

What are some problems faced when driving vehicles during heavy rain?

Please could somebody explain the problems we could face while we are driving during heavy rain or along flooded roads? What are examples of designs that mitigate the issues of driving in heavy rain? ...
2
votes
1answer
130 views

Should we wait a few seconds before starting the engine?

My OCDed cousin's told me when he enter his car, he put the key to ignition then count to 3 and start the engine. The main raison of him doing that is to give enought time to fluids (I'm not sure ...
2
votes
2answers
190 views

What does CC refer to when describing an engine?

I have been learning about various older cars on Wikipedia. I've always wondered what the "cc" refers to in the engine description. For example: 1964–1969 Porsche 911: 1991 cc 1965-1969 Porsche 912: ...
2
votes
3answers
208 views

Hyper-miling and stress on engine oil

The other time I asked my mechanic, are my tyres 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
votes
3answers
121 views

What is this tank for ?

I just bough an old (1980s) Nissan Pathfinder. In the engine I have managed to identify the engine-oil hole, the radiator-water hole and the windshield-washer hole (you can tell I'm a car expert!) ...
2
votes
2answers
4k views

What could cause an engine to make a chirping sound when it's first started up?

I've owned a Diesel Peugeot 307 for a year now but during the recent winter months I have noticed a strange sound in the engine when I started it up. As sounds aren't well described with words, I have ...
2
votes
2answers
298 views

wont start only rapid clicking 2004 chrysler concorde lxi 3.5L

I have a 2004 Chrysler Concorde LXi 3.5. Couple months ago I was driving pulled over shut car off and went into store..when I can out and tried to start it it just rapid clicks . I let it sit for 20 ...
2
votes
2answers
2k views

Should I replace a “blown” engine on my John Deere mower?

I have a 2005 John Deere 115 19 HP automatic riding mower. After leaving it in the garage all winter, I started the mower, drove it about 50 yards, and engaged the blade. It went about 20 feet, made a ...
2
votes
2answers
342 views

Does the a gasoline or diesel engine appy 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 ...
2
votes
1answer
386 views

2004 Buick LeSabre sputters in wet weather only when accelerating

My 2004 Buick LeSabre recently started behaving strangely. At first I thought I had filled up with some "bad gas." I used Heat to treat and after a week or so it seemingly started to work fine. Then ...
2
votes
3answers
305 views

Is my mechanic ripping me off?

My 2002 ford focus (built after may 23) died and the AAA and tow guy both said that it needs a new fuel pump. Anyway I went to the mechanic and he said it'll be 350 for the pump and 200 for labor. I ...
2
votes
3answers
3k views

Squeaking Noise when Cold Start. Suspect something wrong with belts, Also engine missing when sudden acceleration desired from Total Stop

From the past few weeks whenever I crank my car there is a squeaking noise which may continue for about 30-60 sec or even longer (This is intermittent sometimes it doesn't really happen). The engine ...
2
votes
3answers
2k views

Why would welsh plugs start leaking?

I have a VW Citi Golf, and the Welsh plugs on the engine block suddenly started leaking water. The engine sounds fine, but it obviously leaked a lot of water and although I didn't drive far, I'm not ...
2
votes
1answer
192 views

Does using the entire rev range of a car damage it?

On my standard 2000 1.2 Opel Agila, I often have to get to about 5000RPM to join a fast road on a steep (1 in 10) hill, as it is gutless on hills. I have to do this almost every day, and I have ...
2
votes
1answer
31 views

Cylinder Leak-down vs Compression Test

I understand that both cylinder leak down and compression tests are used to test for cylinder head, cracks, warps, and gasket leaks. I understand the difference between how each works: compression ...
2
votes
1answer
45 views

Installing an RPM meter

I need to install one in my car, as it doesn't have one, what modifications do I have to do? Edit: My car is: Suzuki swift 1996 But I would like the answer to be generic, as to what to look for if ...
2
votes
3answers
110 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?
2
votes
1answer
52 views

first “non-replaceable” parts to break

I'm currently modifying my '08 Subaru WRX with everything from suspension(Sways/Strut/Springs...) to Engine(Turbo/TMIC/Injectors...) and much much more...However I would like to get ahead of the game ...
2
votes
2answers
62 views

What is meant by Engine Life Factor(ELF). Should I consider it while buying a vehicle? If so why is it not widely quoted?

The term Engine life factor going by the name suggests that higher the value more is the life of the engine. If so why doesn't companies specify this as a part of their standard specifications?
2
votes
2answers
198 views

Weedeater doesn't run very well w/ muffler on

I know nothing about this kind of stuff. But, when I started my weedeater, and put it on no choke (or even half choke), and gave it full throttle, it slowly died unless I let up on the throttle. I ...
2
votes
2answers
101 views

1999 Toyota Corona burning through oil in a week

I have a 1999 Toyota Corona with a D4 engine. The engine is giving me trouble and seems to be burning all the oil. It burnt through in about a week (after topping it up completely), and I say burn ...
2
votes
2answers
1k views

Formula for calculating output power after putting a rpm reduction gear

I'm thinking of starting of converting an old car to an electric car. I have a question, but google won't answer me my very long not very well explained question. Take this scenario. I would take a ...
2
votes
2answers
87 views

Can a variable engine exist?

I have really no knowledge about mechanics but such a curious guy. Excuse my Ignorance. Does a variable engine exist? Like as the vehicle slows down the engine will slow down and when the vehicle ...
2
votes
1answer
163 views

motorcycle oil for m50B25TU (BMW E34)?

I just bought an e34 from a friend and he said he uses liqui moly racing synth 10w-50 for the engine. My mechanic was quite surprised when I told him and said I shouldn't use that, instead use real ...
2
votes
3answers
2k views

Possible causes of this Honda Civic K20 engine whine/hiss?

I own a 2008 Euro Civic Type-R which has almost the same engine as the US Civic Si (K20Z3 vs K20Z4). Since a bit of time I have a really annoying high pitched noise coming from the engine. It's ...
2
votes
2answers
3k views

Car overheating problem

I have a 2002 Ford Focus. Whenever the car is idling the heat gauge goes up at an alarming rate and goes the farthest into the red that it can if left alone. Now if I rev the engine a little the ...
2
votes
2answers
9k 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. ...
2
votes
2answers
54 views

Pontiac g6 runs lean; throwing codes

My 2006 g6 v6 3.5 is showing codes p0171, p0174, p0705 and u0073 171 and 174 show that the engine is running lean. Is this a serious issue? 0705 shows the trans range sensor a circuit 0073 says the ...