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

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How to flush engine coolant system after oil intrusion

My 02 Buick LeSabre has oil coming from the radiator into the coolant reservoir. Just recently I had a new motor put in to fix the issue. What would be the best/proper way to flush the radiator? It ...
7
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1answer
228 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 ...
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1answer
277 views

What are crankshaft bearings and how are they different from camshaft end bearings?

I hope the answer is not too similar to this question. I have a basic understanding of the role a crankshaft plays in the internal combustion engine, which leads me to ask: Crankshaft Bearings ...
7
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1answer
673 views

When I remove a spark plug is it bad news if dirt or grime falls into the engine

Despite my best effort to clean up a corroded spark plug and blowing the area with compressed air before removing would it be bad news if dirt or grime falls into the engine in the process of removing ...
7
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1answer
62 views

2015 Honda Mobilio - Car shakes when started

I have a 2015 Honda Mobilio with a manual transmission. I have had this car for 6 months and have not experienced any problems until yesterday morning. When I start my car, the engine shakes badly. ...
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2answers
89 views

How do I remove oil sludge from an installed engine?

What's the preferred, non-chemical/non-additive method for removing oil sludge from an engine that's still installed in the vehicle? I'll have the head and oil pan removed. How do I clean out the ...
7
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1answer
159 views

Electric water pump control

Electric fans are now common on cars, both aftermarket and stock. The advantages in horsepower, faster warmup, and hence emissions are well documented elsewhere. The same reasoning can be applied to ...
7
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1answer
111 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?
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1answer
85 views

What exactly is a head gasket?

From what I have gathered, a "head gasket" is an important part of the engine on most cars, but that is about it. What is a head gasket? Where is a head gasket? Why is it necessary?
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1answer
141 views

What exactly is meant by “engine coolant”?

I know that engine coolant is a fluid in the engine used to dissipate heat spots and keep the engine cool in general as the moving parts generate heat. In this context, I would call the oil an "engine ...
7
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3answers
194 views

Will an old engine have worse fuel efficiency than a new engine?

I have a gasoline-engine car that is four and half years old and has been driven for 60 000 kilometers. I have noticed that the fuel efficiency is not what it was when the car was new. However, I ...
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2answers
2k views

What is the likelihood that my crankshaft is warped?

This may be an involved question so bear with me. :) I have a 1998 Honda Accord EX (4cyl) with 281xxx KM, and last week I was told by my mechanic that the harmonic balancer is warped. And in fact, ...
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1answer
43 views

What are primary & secondary engine balance?

I am kind of confused when it comes to this topic. I think I kind of understand primary balance. Which is the back and forth rotation of the pistons. But I don't fully understand it or even get ...
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1answer
151 views

Overheat, coolant loss, P0170/P0117, hard start, smoke, delayed throttle, no vtec

So I'm on the road right now (or was, when I wrote this) having an issue that started a few days ago and I'm trying to diagnose it. I am not sure what info is relevant, it does feel like more than one ...
7
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1answer
71 views

Dirty air filter seal

Whenever I have had work done in the past that I can't perform myself, timing belt etc every garage I have been too has made a real mess with my air filter. When I check the filter there is always ...
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4answers
216 views

2002 Ford F350 Superduty 7.3L Turbo diesel using a quart of oil every 43 miles

This Diesel engine has been rebuilt and it didn't use any oil till the HPOP went out. I replaced the oil pump and then I noticed my turbo when going up a hill and the Turbo would sound like a sneeze ...
7
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1answer
167 views

Car can't start after rocker gasket change

I have a 2008 BMW 120d LCI with N47 engine. Recently was diagnosed with some oil leak on the rocker gasket near the injector area. Were advised to change the rocker gasket seals. So I did change the ...
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1answer
1k views

Why does an engine's idle RPMs take time to settle from a cold start?

I've noticed my car's (healthy) engine will idle at a slightly higher RPM for a few moments after it's been started from cold/not run for a day. I also noticed that my (somewhat less healthy) other ...
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2answers
11k views

Why would my engine temperature raise from normal to high and drop back down again?

I have a Nissan Micra (UK, 51-plate, 2001 model) that I have been using to drive to work on a daily basis - 10 miles each way a day on a variety of roads - streets, main roads, main roads in traffic, ...
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3answers
342 views

Will I be okay running thinner oil with a minor oil leak on an older car?

Recently when I had some work done I was shown a minor leak, I believe he told me it was the oil pan. It doesn't drip out onto the ground, but if you look closely you can see condensed oil drops on ...
7
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1answer
462 views

Ants in my lawn mower engine

Related questions: Are small engines on topic? (meta) Reviving a vehicle that has been idle for a long time. With the arrival of Spring, I went to dust off my riding lawn mower. It had been sitting ...
7
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1answer
48 views

Longer crank time

Today I noticed something strange with my car. I was at a gym studio when I turned the key and I noticed it took a few "er er"'s longer before it started. As anxious I am about my expensive toys, I ...
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1answer
122 views

Warm fuel injected engine stutters when accelerating

I have a 1994 Honda Concerto 1.5l gasoline car, fuel injected. When the engine is cold there are no accleration problems. But once it warms up it stutters if I step hard on the gas. When it does ...
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3answers
14k views

What happens when you run out of fuel?

My question is specific to diesel or gasoline (petrol) engines. Many people told me that it is very bad to run out of diesel since it can damage the engine and it's difficult to re-engage it ...
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3answers
379 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 ...
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2answers
72 views

My 94 Honda Civic..which is a manual..will crank but not start… but it will clutch off

My 94 Honda Civic..which is a 5 speed manual..will crank but not start..It will clutch off and runs and drives well after that. I have to pump the clutch several times before it will even start to ...
7
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1answer
130 views

Short shifting after full throttle

Other than normal wear and tear, are there any detrimental effects or added harm done to the engine by going full throttle in 1st and/or 2nd gear, then shifting up well before redline (say 4k rpm on a ...
7
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1answer
397 views

Fast idle when engine is hot

I have a 2001 Buick Century. Lately, after driving around long enough for the engine to get hot, the idle speed will sometimes race. The car will want to surge forward even when I'm not giving it ...
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2answers
4k views

What is this loud semi-regular clicking on a 2001 Honda CR-V?

Due to the nature of my problem I've had little success on Google. I appreciate any help. I have a 2001 Honda CR-V EX with 130000 miles on it and I'm the original owner. The week prior to my ...
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0answers
58 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 ...
7
votes
1answer
89 views

What is the cause of this strange engine noise and white smoke from the engine?

My car has a problem the engine whistles (Hard to better describe it) white smoke comes out of the engine beneath the fuel filter Two different mechanics could not understand what's happening I ...
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votes
8answers
13k views

What would cause motor mounts to go out on a factory engine?

I got my factory motor mounts replaced on my 2000 eclipse at 175k miles. I am now at 189k and the mounts blew again. I can hear the same rattling and squeaking. I had the spark plugs and valve cover ...
6
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4answers
322 views

Do air filters purifty air better with age?

I have been reading in a few places that air filters get better with age, is this true? And how much better? Would it have any effect on quality of the oil or make oil dirty faster? Or is there ...
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2answers
7k views

What happens to a car engine when giving max throttle while not in gear

I was driving (well standing still actually) during rush hour, and I was suddenly wondering what would happen to a car engine when I would push the accelerator pedal all the way down while the engine ...
6
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2answers
1k views

Why would I paint my car engine?

I've been watching Pete's Garage on YouTube and the guy is absolutely amazing and very enlightening on the subject. He has at least one video on engine painting but he mentions it in a number of ...
6
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3answers
562 views

Trying to figure out the name of this car part!

I got new tires today and saw that the part that's circled is broken on my car. It looks like it just snapped at the top because part of the bolt appears to still be in whatever the tube is. Anyone ...
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3answers
241 views

Weird “old”-sounding engine noise. What's the problem?

Hyundai Sonata 2000 150,000 miles I started getting a noise in the engine that I would describe as "light", and "enginey" Here is a video with sound. https://vid.me/9gkr The sound becomes more ...
6
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2answers
2k views

Should we wait a few seconds before starting the engine?

My cousin 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 which one) ...
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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
6
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2answers
156 views

What is this (cooling-system related) part?

A while back I stopped my 2000 Ford Ranger (V6 4WD) and all of a sudden there was white smoke pouring out from under the hood, indicating that something was leaking radiator fluid. When I opened the ...
6
votes
4answers
3k views

Why does my car scream on cold start?

My 1988 Subaru XT6 2.7L engine screams at me on a cold start then it will stop and then do it again when I take it out of park, but then it stops. Also, my car is losing antifreeze. Any ideas why?
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5answers
1k views

Engine on BMW G650GS 2011 does not start when it's hot

I have a rather strange problem with my BMW G650GS. In the morning, when the engine is cold, it starts fine with a single crank. There is no problem with riding, the engine works fine and never chokes....
6
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4answers
232 views

Cheap vs Expensive Fuels [closed]

What is the difference between the cheapest fuels in a place like Tesco's and the 'high quality', highly priced competitors? Is there actually any noticeable difference in available power, engine ...
6
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1answer
258 views

why is it not good to stall a cold engine

I've always known that you cannot stall (regular turn off by turning key (i'm not sure how that's called in english)) an engine if it is not yet reached it's work temperature. For example, if i go to ...
6
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5answers
16k views

How does cold, dry weather affect horsepower?

It's now properly winter over here in Australia, and the butt dyno is very favourable of the cold, dry air. It's like a free cold air intake for everyone, right?? I can think of two scientific ...
6
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3answers
17k views

How do I find a vacuum leak? I'd highly prefer not to use a carb cleaner spray

The car is a 1998 Oldsmobile Intrigue with 3.8L V6 engine (3800 Series). I've been doing my research and due diligence, but please understand I'm very inexperienced with automobiles. I went to ...
6
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3answers
378 views

Engine temperature range?

Our 'new' ('07) Cobalt has a digital temp readout. Temperature varies substantially, depending on driving conditions - I've seen it as high as 210(F) on city streets, on a not-very-warm day. Our old ...
6
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1answer
80 views

Engine oil found in the radiator - how did it get there?

What could be the possible cause of oil leaking into the radiator when the engine is running? I have changed the O-rings on the oil cooler and pressure tested the cooler.
6
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2answers
774 views

Do you need charged battery for car to Idle

I am planning to acquire a 2001 Mitsubishi lancer 1.5 the car runs perfect but the it has an almost flat battery, even the horn doesn't work unless driven around.(No starting Problem though weirdly) ...
6
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3answers
347 views

What is an inverted triangle piston skirt?

The recently launched Suzuki GSXR150 boasts an inverted triangle piston skirt. From what I have been told, it seems to be MotoGP technology which has been stripped down to suit a 150cc bike. Kindly ...