Questions tagged [engine]

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

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55 views

How is it possible for the oil to fall back to the oil pan soon enough to prevent oil starvation?

This is one thing I don't understand. When the engine is running, the oil is pumped by the oil pump towards the upper part of the engine (cylinder head assembly). I know there are some galleries ...
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2answers
101 views

Is it harmful for the engine if you drive a long distance nonstop?

I'm planning to have a 370 kilometers road trip between two cities. I want to drive at 90 km/h average speed and without any break or stop. Is it harmful for the engine to run nonstop for about 4 or 5 ...
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26 views

Long term engine issues by using Active Exhaust?

Looking to install OEM active valve mufflers on my 2019 Mustang EcoBoost. Wondering if the valves opening and closing, thus changing exhaust back-pressure would cause the engine to run lean/rich and ...
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Burning smell comes from the engine oil sump area

My motorbike has been suffering from an issue which goes like this . Whenever I drive for a few kilometres a smell comes from the engine oil sump area even if the engine oil is brand new . One year ...
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Bf falcon trying to skid

i tried doing a skid and burnout i put my foot all the way down on the brake and accelerator with traction control off tried multiple times nothing happen expect when i went to a dirt road it worked ...
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EJ205 - Valves Seats Recut and Reseated by machinist then failed leakdown test on engine stand

After getting the community's help on my previous question, I sent my cylinder heads to a local machine shop to get a valve job done (valve seats cut, valves reseated, and valve clearances redone). ...
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26 views

Is it right to presume that the top hose to heater matrix is always the hot hose?

Is it right to presume that the top hose to the heater matrix always comes fom the engine goes to the heater matrix and then exits, cold, to the lower radiator hose? I have an o series engine ...
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33 views

Engine vibration when A/C is on

I have a Toyota IQ 2010 model. I bought this car second hand having driven 50,000 KM. When I bought the car it had power and acceleration issues, it wouldn't even climb a small ramp. Other problems ...
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352 views

What can cause knocking sound when pressing and releasing gas pedal?

I hear a knocking sound whenever I pres the gas pedal and accelerate fast, or when I quickly take my foot off the gas. I hear it at low speeds 25-40mph. Just replaced the CV axles, put on new tires, ...
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2012 Hyundia Accent

I have 2012 Hyundai Accent. The EPS light came on. After it runs for a while and I try starting it, it is difficult to start and then the rpm gauge doesn't work and the eps light comes on. It doesn't ...
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How to design an exhaust pipe to increase scavenging at specific RPMs

Good day all. I'm looking for advice on an exhaust design problem. It is easy to find videos explaining exhaust scavenging, but how do you control it? Surely there must be some physics that can be ...
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2013 Dart SXT Clunking/Grinding, Front Right

I own a 2013 Dart SXT, 140k miles. I typically do all my own maintenance, so most of the car is in decent shape. However, for the first time I took my car to a shop to get an alignment + 2 front tires....
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Is there a special procedure for preparing a new but very old stock engine?

I have a 1979 Austin morris (leyland,freight rover) Sherpa campervan 1979 model 230 with a "17v" "o" series engine 1.7 litre. I am soon to replace the engine with a new old stock (...
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1answer
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Leakdown Test | EJ205 on Engine Stand and replaced all Valves

I have my EJ205 out of my 2003 WRX. I pulled the engine in the first place to troubleshoot a 90% pressure loss in Cylinder 4 (measured via a leakdown test with the Engine still in the car). The ...
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1answer
47 views

Smoke from engine, cranks but wont start

I came off the motorway to a slip road, slowing down to 20mph and about to turn when I saw smoke coming from my engine bay. Then all the lights on my dashboard (not just warning but all of them) ...
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Engine locked while driving

Hi I have a volvo 440 d13 motor. Driver could not get the truck started but dashboard displayed that it was in neutral and no faults appeared. A mechanic went to site and said that the truck was stuck ...
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Engine oil change from 15w50 to a higher viscosity

I have a 2000 Mitsubishi Lancer CK2 with a 4g15 dohc 16 valve engine. I've been using Valvoline VR1 15w40 engine oil and recently noticed its burning a bit more oil than usual. The tailpipe is clean ...
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59 views

Keeping a device in cigarette lighter

I own a Ford Fiesta 2006 when my car is turned off my cigarette lighter stays on as I only have one I use a 3 way cigarette lighter plug splitter adapter I use one port for the dash cam and one for an ...
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1answer
147 views

my car can't climb even a small ramp

I own a Toyota IQ model 2010 I have been experiencing this issue from the past year that my car when stopped on a small ramp it wouldn't even climb. Then I have to reverse all the way and get some ...
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1answer
42 views

Engine performance

On a straight four diesel engine Can you replace some pistons bearings and leave other unchanged , Will that have any negative effects on the performance of the engine
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32 views

Testing whether engine stutter/hesitation is caused by catalytic converter

I have a 2005 Ford Expedition, from my dad, which stutters and hesitates to accelerate. Sometimes it barely has a problem and sometimes it's bad. It has new spark plugs and spark plug coils which the ...
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1answer
198 views

Pros and cons of driving a vehicle with a misfiring cylinder

Check engine light came on for a Toyota Prius that is only being driven about once a month since COVID-19 pandemic began. OBD-II scanner shows P0302, which indicates the problem is a misfiring ...
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engine not cranking, it only gives click sound as I try to start

2009 Hyundai i20 engine died while driving and it is now not cranking. I have changed spark plugs but in vain
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1answer
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Spark Plug Deposits

So, I pulled the spark plugs today to check to see how the engine is running. After pulling all 6 spark plugs, I've noticed there is a white deposit caked onto the spark plugs. I doubt this is normal ...
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My Solara 2005 showing hot steam coming under hood

I have been smelling something strange over a week and now catch it https://youtu.be/0tv9vBT_oKU It is shooting hot steam and I believe one time I saw a little bit red fire coming out from the right ...
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What if I added a little tap water to the engine coolant?

I had my engine coolant level at "below LOW" and I was sure there is a leak. So I added 0,5l of tap water (full capacity of coolant is 5l) to check for the leak. It turned out it is not a coolant leak ...
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crankshaft rotation R6

I am performing a valve adjustment, I have been reading the yamaha r6 workshop manual, and it tells me to rotate the crankshaft counterclockwise, by doing this I hear gear sounds that I did not like, ...
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1answer
43 views

5L vortec won’t start

Ok, so I hope this doesn’t seem like a stupid question. Take away all logical scenarios and just answer in theory. If a timing chain could jump exactly 180’ would the intake and exhaust valves reverse ...
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2012 VW Amarok is leaking oil into the overflow bottle

I have a 2012 VW Amarok TDI 400 Highline. I have replaced the head, both turbos, and the engine oil cooler, I did a thorough flush, however I took the car for a short drive ( about an hour ) and I ...
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28 views

Loud ticking noise from engine that increases when idling, but disappears entirely when accelerating

I have a 2008 Land Rover with a TD4 engine and 90000 miles. The engine’s been making a ticking noise while idling that gets louder if the car continues to idle, but when I speed up, it completely ...
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1answer
80 views

Alternator output power relationship

Overview: I am currently working on a project that requires a 24v alternator, which is powered by a mower engine. This engine in particular runs around 3,000 rpm, give or take, and does not exceed 3,...
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2004 Yamaha Outboard 50HP vibrating around half throttle (2700-3100 RPM)

I've recently bought a 2004 Yamaha outboard, specifically a F50 TLRC (four stroke 50HP) and it is generally in good condition, takes a couple key turns on startup but always starts, a little rough on ...
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2answers
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What causes a VW Golf 2017 engine warning light to appear?

I did a test drive of a used VW Golf 2017 manual transmission, 140 000 km. The yellow engine warning light appears when the key is half-turned and disappears when the engine starts. What could cause ...
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1answer
37 views

2004 Acura TSX. Locating a missing unplugged wire under hood?

Bought a used Acura and I was looking under the hood and found this unplugged wire. It's orange and right behind the fuse. It's bunched up with other wires. Is it just and extra cable that doesn't ...
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0answers
26 views

White Smoke and Engine Coolant Light

I’ve just been in traffic for around an hour and my engine coolant light came on. As I couldn’t pull over anywhere there’s no way I could turn off my engine for a good amount of time(nightmare). The ...
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52 views

Lawnmower locked up, cannot turn shaft

Thank you for coming here. My dad recently picked up a Craftsman gcv 160 mower. When I unloaded it, I ran it for a while, then drained the oil. Remember, it worked when I got it. The oil was very ...
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428 views

Will driving car without coolant cap do long term damage to car?

So this morning I did something stupid. I had checked the coolant in my car and it was fractionally below the min point, but still fluid in the tank. I poured in some water so it filled to between the ...
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2answers
35 views

Empty radiator, engine temperature fluctuating

Hi and thank you in advance, I have a 2005 honda civic ex, everything stock. My engine temperature gauge has been fluctuating, mostly in city, on highway it stays in the middle range. Here is what I ...
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1answer
59 views

CC per HP in a 2-stroke engine?

I have a bunch of 2-stroke engines and the websites that I found only tell me about 4-cycle engines. Do you happen to know the ratio of cc to HP?
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I have a 2008 Ford Expedition XLT

I have a 2008 Ford Expedition XLT. While changing my spark plugs I didn’t push them down as far as was required therefore on two of them the hook broke off and now it’s making a clacking metal sound. ...
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1968 I-6 swap questions about the spindles and or any tips/ etc

I have a original inline 6 that I’m swapping with a 302 I already have a c-4 trans that is in the car currently, I know of swapping the front end and what I have to do for the extra weight but (not ...
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1answer
63 views

White smoke coming from dash when I accelerate above 60 and steams up the windshield when I accelerate it up to 30 or 35 any advice would help thanks!

My 03 Chevrolet s10 extreme 4.3L is sending White smoke through my air vents and from under my dash, also is steaming up the windshield when I accelerate my tuck above 60 but when I’m accelerating to ...
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1answer
54 views

How does enough oil remain after combustion to lubricate during exhaust stroke

To my understanding, cylinder walls are lubricated by retaining a tiny amount of oil in the honed or otherwise manufacturing prepared cavities in the cylinder walls, so that when the piston rings ...
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1answer
109 views

Is this a bad engine mount?

So it's my first time opening the hood of my car, only to find this. I came to ask because this doesn't look normal, I dont know any reason what could cause this as its a new unit, 600 kms on my odo ...
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29 views

Why does my motorcycle turn off?

My name is Tracy from Dallas and I'm trying to diagnose a strange problem on my bike. Bike: Harley Davidson Street Glide. My motorcycle turns off while running and it turns off while at a stand still....
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Engine feels sluggish sometimes

1998 Nissan frontier 2wd xe kingcab 4 cylinder automatic transmission Sometimes it feels slow to accelerate, like it's not getting gas, or like its not in the right gear, and the shifts feel a little ...
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1987 Suzuki Dr 125 what size mm carb does it take

What size mm carb is on a suzuki1987 Dr 125 and what type of aftermarket can I get for it
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4answers
2k views

Does a, “5% oil life remaining” dash message mean low quality or low quantity, or both?

I’ve never seen this question answered on any boards. When my 2008 Ford Escape says I have 3% oil life remaining, I know it means I’m due to change it. But for curiosity sake, is the algorithm or ...
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1answer
38 views

Black smoke coming from tail pipe?

I recently purchased a Honda CRF50 dirt bike for my kids. When applying the throttle black smoke that smells like gasoline comes out of the tailpipe. From what I understand this means that there is ...
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2answers
42 views

Second butterfly valve in riding lawnmower?

So I am helping out my neighbor with her lawnmower, tuning it up and what not for the summer. I noticed that when running the lawnmower, as soon as you take it off of choke, it revs up as fast as it ...

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