Questions tagged [engine]

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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7answers
51k 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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1answer
1k views

Is pre-heating a modern engine worth it?

I have a 2011 Toyota Yaris and live in climate where -5C temperatures are common and -20C are not unheard of. The car has an electric engine pre-heater installed. I don't know exactly what is the type ...
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2answers
62 views

04 Mercury Montery stalling while driving

While driving on the highway my van stalled. Once on the side of the road, I tried to restart and no joy. All indicators and lights came on but when I turned the key nothing happened. I jiggled he ...
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2answers
4k 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 no ...
5
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2answers
6k 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: ...
5
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1answer
2k views

Rod knock in my engine?

Kindly assist. My 1GFE engine had a rod knock sound and I replaced all the bearings, oil filter, cleaned the sump & strainer and tolled it with brand new fully synthetic oil. The engine ran for ...
5
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2answers
2k 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
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2answers
3k views

Astra Turbo sounding like a diesel

http://www.youtube.com/watch?v=ph6JOhFJcJA The video above demonstrates the sound I hear when my car is at operating temperature. I don't know why it would sound so rough. It doesn't sound quite as ...
5
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1answer
7k views

Smoke coming out of oil fill port

I've been reading up on this smoking oil dipstick tube/oil port for Volvos and they all seem to stem around a clogged PCV system as being the root cause. We're looking at a 2005 Volvo S80 5cyl 2.5L ...
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2answers
2k views

Semi synthetic oil engine break-in

I've finished rebuilding the engine of my motorcycle (4 stroke 650cc single-cylinder). For now it runned only once varying between 1000 and 2000 RPM for 5 minutes with a couple of short bursts after ...
5
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2answers
1k 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
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1answer
850 views

XJ600 1994 Seca 2

I am wondering if anyone can shed light on an issue we are having with this particular bike. Basically, the bike starts fine cold and warms up and drives perfectly for about 15 minutes ( responsive to ...
5
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1answer
3k views

Block flatness tolerance?

2006 Solstice (says hello). The engine overheated for some reason, going from ~200F to ~300F in a matter of seconds. (Actually, the gauge changed directly from 203F to 298F.) The head is over at the ...
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2answers
6k views

Oversize rod bearings question

I have a simple question that has been on my mind for a bit and I cant seem to find the answer. My question being: how do I know what size rod bearings to buy? I know that I have to use plastigage to ...
4
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2answers
2k views

Why can a reasonably new car consume oil?

I have understood that the oil consumption between cars varies a lot, more than an order of magnitude. And by this I don't mean that a specific model of car consumes more oil than another model of car,...
4
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2answers
239 views

Can I hold an engine (with aluminum block) using its gearbox studs?

I just finished building my own engine stand, however, I have (yet another) problem to solve: in the original Czechoslovakian manual I see the factory stand holds the engine from a side, holding it by ...
4
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2answers
8k views

Going more than recommended Speed in Break-in Period

I have a new Yamaha motorbike. Seller told me not to ride speed more than 50 Kmph for first 1000KM but I rode it 60 for 10 - 15 minutes due to some reason. How does it affect to my Motorbike ?.
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2answers
3k views

Forced induction and engine braking

So does forced induction negate the effect of engine braking on compression motors? For example, going down an incline, drop into 3rd (automatic) to get some engine braking going. With my new Chevy ...
4
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2answers
35k views

What is piston slap?

I tried searching this website for this question but couldn't find any. So what exactly is piston slap? is it harmful for the engine? can it be avoided?
4
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1answer
2k views

2001 Pontiac Grand Am SE oil in the coolant

Recently my car started chugging and "vibrating" at low speeds, and the check engine light is flashing on and off. On inspection, I found oil in the coolant. I don't know a lot about cars, but a ...
4
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1answer
1k views

Why is lugging hard on connecting rods?

I was researching the effects of lugging and came upon this thread, one of whose answers claims that lugging is really hard on the connecting rods. but without explaining why. Can you explain ...
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3answers
1k views

Dying car, at random intervals

So my 1996 Jaguar XJR is just stopping at random. It happens when the car is doing low RPM, like when I am coming/stading at a stop light. Any ideas on where to start to troubleshoot this problem? ...
4
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2answers
29k views

Effects of Dirty Piston Heads and Intake Valves

What are the effects of dirty ( allot of carbon build-up ) piston heads and intake valves? I just used an endoscope to take a look at my piston heads while changing my spark plugs and the heads had ...
4
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2answers
424 views

Which school of thought is right for breaking in engines - keep RPM below 3000 for the first 3000 miles, or rev up to redline?

My friend has overhauled his engine recently and he sought my advice about the most efficient way of breaking in his new engine (Peugeot 405 1.8L Petrol). It is usually said that you should keep RPM ...
4
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3answers
119k views

Car will not start Sometimes?

Hey i just wanted to ask about my girlfriends car she has been having problems with for over a year.. we had it checked but they always say nothing is wrong (usually because the car starts when they ...
4
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1answer
895 views

How long does items in the engine last in general for standard size cars?

I have a volkswagon passat wagon. It just reach 70000M and it is 2007 model. I recently check the engine at the dealership. Now they asked me to replace all the following items to fix engine overheat ...
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1answer
5k views

Opel Corsa D engine issue?

I have a 2011 1.4 petrol Corsa D. When accelerating the car lurches. This doesn't happen all the time and is seemingly random. It may happen when I accelerate from 60 on the motorway back to 70 or 30 ...
4
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3answers
2k views

Should I keep the engine running for a minute or two after reaching my destination to cool down?

My father bought a new car and in the owners manual it advises to keep the engine running for a little while after stopping, the car in question is a 2016 Skoda Rapid with no turbo on it. I know in ...
4
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1answer
3k views

Should I care about valve order or are they interchangeable?

So I've just learned how to take valves down and I'm pretty fascinated by the whole mechanism. I got a C-clamp compressor and took two valves out just to try. Went smooth. A question: is it important ...
4
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1answer
234 views

Poor battery condition, replacement required! Or is it?

I drive a 2004 VW Passat B5. Recently, my insurance company came round to fit a black box to my car as part of the terms and conditions of my car insurance policy. Whilst they were doing this they had ...
4
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1answer
579 views

What will upgrading the Camshaft do to my BBC 454?

I have been told that upgrading the Camshaft in my GM 454 will increase performance. What will this do exactly and what will the engine actually gain? 10069286 block casting 454cu '90-'91 MY, Mark IV ...
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1answer
173 views

Car engine coolant system (radiator cap) air

I have only one question! So what I've heard, it's bad to have air left in the coolant system! So my question is, can air get inside the coolant system if I just take off the radiator cap to check ...
3
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1answer
371 views

How does EVAP interact with a vehicle?

I have an EVAP system (mandated by California) on my Yamaha FZ-07, but only a minimal idea of how it works. First of all, it looks like my fuel tank has a separate "breather" hose separate from any ...
3
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1answer
11k views

The effect of hitting deep water hard

Like other questions I've read before posting this one, I was driving through unfamiliar territory during a storm. I was coming down a bridge and it was dark and I couldn't see that the street was ...
3
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1answer
4k views

Bottom piece of spark plug broke off in motorcycle engine

I was riding my 2005 RM125 dirt bike the other day when it bogged down all of a sudden. I noticed the spark plug had backed out of the head, thus causing the stall. I pulled the spark plug all the way ...
3
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1answer
927 views

Shortblock vs Longblock

What is the difference between a shortblock and a longblock? Both terms are used to refer to the engine, but what's the difference between them?
3
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1answer
454 views

VW Golf 2001 Mk4 Diesel ASR Engine Problem

I've spent a crazy amount of money on my car lately and I still have the same problem. I've replaced the: Catalyst Converter Radiator Starter Motor EGR Valve Track Rod ends & Wheel Bearings The ...
3
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2answers
2k views

Why are intake valves dirtier than exhaust?

I took my engine apart and one of the things I noticed, on both cylinder heads of my Tacoma V6, is that the intake valves (picture right) are significantly darker (or dirtier) than the exhaust ones (...
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1answer
2k views

Coil Pack Location

Where are the coilpacks located in a 1998 Buick LeSabre? Images would be most appreciated. Robert
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1answer
1k views

What are cam shaft end bearings?

I now have a basic understanding of the role a cam shaft plays in the internal combustion engine, but what is a bearing? Or more specifically, what exactly is a "cam shaft end bearing"? Also, where ...
3
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1answer
564 views

'Re-Timing' my Engine after timing belt removal

I have little mechanical experience. I decided to try and do the Timing Belt / Water Pump in my 2003 Subaru Outback ( Interference Engine ). Watched a video where someone neglected to put the engine ...
2
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3answers
7k 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
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3answers
2k views

Can you estimate engine condition based on how quickly the oil turns black?

I checked the oil level on my car that had oil changed 2000 km ago (the car doesn't seem to consume any oil, so I don't check it every 1000 km). The oil color was in an intermediate state between new ...
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2answers
602 views

Motorcycle engine mounting bolts grade

I need to decide upon a pair of bolts that will be used on my motorcycle to mount a pair of frame sliders. The already present frame sliders are installed with (supposingly???) 10.9 grade M10x1....
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4answers
5k 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
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1answer
32 views

Mazda 6 V6 auto rough misfiring – fuel flow problem?

2007 Mazda 6 3.0L V6 automatic with ~80k miles: Runs "rough," especially while stopped in drive – feels like what I imagine an occasional cylinder misfire would feel like, producing a sort ...
2
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1answer
805 views

Considerations for a successful VW 2004 Jetta 2.0L engine swap in place of a 1.6L engine

Vehicle make: Volkswagen Model: Bora Year: 2004 Issue: Swapped the 1.6L for a 2.0L. No programming of the ECU was necessary neither was a change of ECU necessary until vehicle started misbehaving - ...
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1answer
1k 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
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1answer
142 views

Detect engine stumble or hesitation

I want to know if I can detect my engine is having hesitation/stumble problem from an OBD. I mean not from any fault codes, but from the parameters obtained from the OBD. e.g. calculate the obtained ...
2
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1answer
96 views

Designing IC engine [closed]

I am trying to design a theoretical internal combustion (IC) engine. The ultimate goal is to achieve 3000 hp with this engine, for which I know I will need low bore x stroke ratio, high compression, ...